TY - JOUR AU - Alan, Anil AU - He, Chaozhe R. AU - Molnár, Tamás Gábor AU - Mathew, Johaan Chacko AU - Bell, A. Harvey AU - Orosz, Gábor TI - Integrating Safety With Performance in Connected Automated Truck Control: Experimental Validation JF - IEEE Transactions on Intelligent Vehicles J2 - IEEE Transactions on Intelligent Vehicles VL - 9 PY - 2024 IS - 1 SP - 3075 EP - 3088 PG - 14 SN - 2379-8858 DO - 10.1109/TIV.2023.3305204 UR - https://m2.mtmt.hu/api/publication/34686317 ID - 34686317 LA - English DB - MTMT ER - TY - JOUR AU - Allen, Lara I. AU - Molnár, Tamás Gábor AU - Dombóvári, Zoltán AU - Hogan, S. John TI - The Effects of Delay on the HKB Model of Human Motor Coordination JF - SIAM JOURNAL ON APPLIED DYNAMICAL SYSTEMS J2 - SIAM J APPL DYN SYST VL - 23 PY - 2024 IS - 1 SP - 1 EP - 25 PG - 25 SN - 1536-0040 DO - 10.1137/22M1531518 UR - https://m2.mtmt.hu/api/publication/34486405 ID - 34486405 N1 - Funding Agency and Grant Number: Hungarian Academy of Sciences through its Distinguished Guest Scientist Programme Funding text: Funding: The fourth author received support from the Hungarian Academy of Sciences through its Distinguished Guest Scientist Programme. LA - English DB - MTMT ER - TY - JOUR AU - Balogh, Tamás AU - Insperger, Tamás TI - Extending the admissible control-loop delays for the inverted pendulum by fractional-order proportional-derivative controller JF - JOURNAL OF VIBRATION AND CONTROL J2 - J VIB CONTROL VL - Előzetes kiadás / Early view PY - 2024 PG - 9 SN - 1077-5463 DO - 10.1177/10775463231181662 UR - https://m2.mtmt.hu/api/publication/34040356 ID - 34040356 N1 - Funding Agency and Grant Number: Ministry of Culture and Innovation of Hungary [TKP-9-8/PALY-2021]; Nemzeti Kutatasi Fejlesztesies Innovacios Hivatal [NKFI-K138621, BME-NVA-02]; New National Excellence Program of the Ministry for Culture and Innovation [UNKP-22-3-II-BME-98] Funding text: The author(s) disclosed receipt of the following financial supportfor the research, authorship, and/or publication of this article: The research reported in this paper has been supported by Project no.TKP-9-8/PALY-2021 provided by the Ministry of Culture and Innovation of Hungary from the National Research, Developmentand Innovation Fund,financed under the TKP2021-EGA funding scheme, by the Nemzeti Kutatasi Fejlesztesies Innovacios Hivatal(Grant nos. NKFI-K138621 and BME-NVA-02) and by the UNKP-22-3-II-BME-98 New National Excellence Program of the Ministry for Culture and Innovation from the source of theNemzeti Kutatasi Fejlesztesies Innovacios Hivatal. AB - Stabilization of the inverted pendulum by fractional-order proportional-derivative (PD) feedback with two delays is investigated. This feedback law is obtained as a combination of PD feedback with two delays and fractional-order PD feedback with a single delay. Different types of stabilizability boundaries and the corresponding geometric and multiplicity conditions are determined using the D-subdivision method. The stabilizable region is depicted in the plane of the delay parameters for given fractional derivative orders. Several special cases and the concept of delay detuning are also discussed. It is shown that the admissible delay can be slightly increased compared to the integer-order PD feedback by introducing a fractional-order feedback term. LA - English DB - MTMT ER - TY - JOUR AU - Bártfai, András AU - Vörös, Illés AU - Takács, Dénes TI - Stability analysis of a digital hierarchical steering controller of autonomous vehicles with multiple time delays JF - JOURNAL OF VIBRATION AND CONTROL J2 - J VIB CONTROL VL - 30 PY - 2024 IS - 1-2 SP - 330 EP - 341 PG - 12 SN - 1077-5463 DO - 10.1177/10775463221146624 UR - https://m2.mtmt.hu/api/publication/33555101 ID - 33555101 AB - This study investigates the lane-keeping control of autonomous vehicles with an emphasis on the digital delayed nature of the system. The vehicle dynamics are represented using a kinematic bicycle model, and a hierarchical lane-keeping controller is introduced with multiple delays in the feedback loop. An extension of the semidiscretization method is presented, in order to perform the stability analysis of the digitally controlled vehicle with multiple discrete time delays. The differences between the continuous approximation and the exact consideration of discrete time delays are highlighted. We show that in certain cases, neglecting the effects of quantization can lead to significant inaccuracies, especially when tuning the lower-level controller. The results are verified using a series of small-scale laboratory experiments. LA - English DB - MTMT ER - TY - JOUR AU - Cao, X. AU - Bui, D.C. AU - Takács, Dénes AU - Orosz, Gábor TI - Autonomous unicycle: modeling, dynamics, and control JF - MULTIBODY SYSTEM DYNAMICS J2 - MULTIBODY SYST DYN VL - Előzetes kiadás / Early view PY - 2024 PG - 34 SN - 1384-5640 DO - 10.1007/s11044-023-09923-7 UR - https://m2.mtmt.hu/api/publication/34077846 ID - 34077846 N1 - Correspondence Address: Orosz, G.; Department of Mechanical Engineering, United States; email: orosz@umich.edu LA - English DB - MTMT ER - TY - JOUR AU - Cohen, Max H. AU - Molnár, Tamás Gábor AU - Ames, Aaron D. TI - Safety-critical control for autonomous systems: Control barrier functions via reduced-order models JF - ANNUAL REVIEWS IN CONTROL J2 - ANNU REV CONTROL VL - 57 PY - 2024 SN - 1367-5788 DO - 10.1016/j.arcontrol.2024.100947 UR - https://m2.mtmt.hu/api/publication/34741351 ID - 34741351 LA - English DB - MTMT ER - TY - JOUR AU - Debnath, Minakshi AU - Chang, Joshua AU - Bhandari, Keshav AU - Nagy, Dalma AU - Insperger, Tamás AU - Milton, John G. AU - Ngu, Anne H. H. TI - Pole balancing on the fingertip: model-motivated machine learning forecasting of falls JF - FRONTIERS IN PHYSIOLOGY J2 - FRONT PHYSIOL VL - 15 PY - 2024 SN - 1664-042X DO - 10.3389/fphys.2024.1334396 UR - https://m2.mtmt.hu/api/publication/34767934 ID - 34767934 AB - Introduction: There is increasing interest in developing mathematical and computational models to forecast adverse events in physiological systems. Examples include falls, the onset of fatal cardiac arrhythmias, and adverse surgical outcomes. However, the dynamics of physiological systems are known to be exceedingly complex and perhaps even chaotic. Since no model can be perfect, it becomes important to understand how forecasting can be improved, especially when training data is limited. An adverse event that can be readily studied in the laboratory is the occurrence of stick falls when humans attempt to balance a stick on their fingertips. Over the last 20 years, this task has been extensively investigated experimentally, and presently detailed mathematical models are available. LA - English DB - MTMT ER - TY - JOUR AU - Fodor, Balázs AU - Kossa, Attila TI - Stability study of the compressible Mooney-Rivlin hyperelastic model JF - JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN J2 - J STRAIN ANAL ENG VL - Előzetes kiadás / Early view PY - 2024 PG - 11 SN - 0309-3247 DO - 10.1177/03093247241233712 UR - https://m2.mtmt.hu/api/publication/34728803 ID - 34728803 N1 - Correspondence Address: Fodor, B.; BMW Group, Germany; email: balazs.fodor@bmw.de Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH, FK 142457 Funding text 1: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the Hungarian National Research, Development and Innovation Office (FK 142457). AB - The unstable behavior of the isotropic, compressible Mooney-Rivlin hyperelastic model is investigated and described. The constitutive equation is parameterized with the help of the ground-state Poisson’s ratio and the dimensionless ratio of the material parameters [Formula: see text] and [Formula: see text]. Transverse stretch solutions are obtained for standard homogeneous loading modes, and the stress solutions are computed numerically for the physically permitted range of the ground-state Poisson’s ratio. We introduce a numerical technique to isolate subdomains with non-unique transverse stretch responses. Our analysis revealed some limitations of the model and allowed us to make critical observations about the strengths and weaknesses of the model. The analyses we present are essential to understand the characteristics of this widely used hyperelastic model. The novel results have important implications for the application of the isotropic, compressible Mooney-Rivlin hyperelastic material model. LA - English DB - MTMT ER - TY - JOUR AU - Hauck, Bence AU - Szekrényes, András TI - Enhanced beam and plate finite elements with shear stress continuity for compressible sandwich structures JF - MATHEMATICS AND MECHANICS OF SOLIDS J2 - MATH MECH SOLIDS VL - Előzetes kiadás / Early view PY - 2024 PG - 39 SN - 1081-2865 DO - 10.1177/10812865231221992 UR - https://m2.mtmt.hu/api/publication/34628212 ID - 34628212 N1 - Correspondence Address: Hauck, B.; Department of Applied Mechanics, Hungary; email: bence.hauck@mm.bme.hu Funding details: TKP-6-6/PALY-2021 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, 134303, BME-NVA-02, TKP2021-EGA-02 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding text 1: The author(s) disclosed receipt of the financial support for the research, authorship, and/or publication of this article: This work was supported by the ÚNKP-22-3-I-BME-88 New National Excellence Programme of the Ministry for Culture and Innovation from the source of the National Research, Development and Innovation Fund. This work was also supported by the National Research, Development and Innovation Office (NKFI) under grant no. 134303. The research reported in this paper was supported by the National Research, Development and Innovation Fund (grant no. BME-NVA-02 and TKP2021-EGA-02) provided by the Ministry of Innovation and Technology financed under the TKP2021 funding scheme. The research reported in this paper was also supported by project no. TKP-6-6/PALY-2021 provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. AB - This paper concerns and presents new improved beam and plate finite elements for analysing sandwich structures from the structural and modal points of view. In this study, the material behaviour is supposed to be linear elastic and orthotropic, but the method could be extended for nonlinear problems as well. The current models are able to treat the compressibility of the soft core materials, besides the interlaminar continuity conditions and the zero shear stresses on the shear-free surfaces are granted by the Lagrange multiplier method. In order to provide stress continuity along the element boundaries, the Hermite interpolation is employed for the elementary formulations that yields subparametric finite elements. On the contrary, the semi-analytical solutions of these enhanced beam and plate models are also discussed here for particular boundary conditions. The verification of the new finite elements is carried out by two case studies. The test examples are modelled and solved in commercial finite element software (ANSYS) with general shell and solid elements, too. The results derived from different models are subjected to a comprehensive comparison. Also, the structural and modal analyses of the test examples are presented during the case studies. The structural analysis of an overconstrained sandwich panel is also discussed to point out the significance of the proper shear stress distributions. Finally, the advantages and disadvantages of the newly developed elements and semi-analytical solutions are revealed in detail. © The Author(s) 2024. LA - English DB - MTMT ER - TY - JOUR AU - Hauck, Bence AU - Szekrényes, András TI - Advanced finite element analyses to compute the J-integral for delaminated composite plates JF - APPLIED MATHEMATICAL MODELLING J2 - APPL MATH MODEL VL - 126 PY - 2024 SP - 584 EP - 605 PG - 22 SN - 0307-904X DO - 10.1016/j.apm.2023.11.012 UR - https://m2.mtmt.hu/api/publication/34420141 ID - 34420141 LA - English DB - MTMT ER - TY - JOUR AU - Heitz, T. AU - He, N. AU - Ait-Mlouk, A. AU - Bachrathy, Dániel AU - Chen, N. AU - Zhao, G. AU - Li, L. TI - Investigation on eXtreme Gradient Boosting for cutting force prediction in milling JF - JOURNAL OF INTELLIGENT MANUFACTURING J2 - J INTELL MANUF VL - Előzetes kiadás / Early view PY - 2024 PG - 17 SN - 0956-5515 DO - 10.1007/s10845-023-02243-9 UR - https://m2.mtmt.hu/api/publication/34342452 ID - 34342452 N1 - College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China Skövde Artificial Intelligence Lab, School of Informatics, University of Skövde, Skövde, 541 28, Sweden Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, 1111, Hungary Correspondence Address: He, N.; College of Mechanical and Electrical Engineering, China; email: drnhe@nuaa.edu.cn Correspondence Address: Chen, N.; College of Mechanical and Electrical Engineering, China; email: ni.chen@nuaa.edu.cn LA - English DB - MTMT ER - TY - JOUR AU - Sanz-Calle, M. AU - Munoa, J. AU - Morelli, L. AU - Iglesias, A. AU - López, de Lacalle L.N. AU - Dombóvári, Zoltán TI - On the effect of radial engagement on the milling stability of modes perpendicular to the feed direction JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 49 PY - 2024 SP - 111 EP - 127 PG - 17 SN - 1755-5817 DO - 10.1016/j.cirpj.2024.01.006 UR - https://m2.mtmt.hu/api/publication/34568143 ID - 34568143 N1 - Dynamics & Control, IDEKO, Arriaga industrialdea 2, Elgoibar, 20870, Spain Mechanical Engineering Department, Faculty of Engineering of Bilbao, University of the Basque Country, 3 Rafael Moreno Ave., Bilbao, 48013, Spain Department of Industrial Engineering, University of Firenze, via di Santa Marta 3, Firenze, 50139, Italy MTA-BME Lendület Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3, Budapest, H1111, Hungary Export Date: 9 February 2024 Correspondence Address: Sanz-Calle, M.; Dynamics & Control, Arriaga industrialdea 2, Spain; email: msanz@ideko.es Funding details: European Commission, EC Funding text 1: Special thanks to Mikel Zatarain for providing the motivation for this paper. This project (Fibremach FTI 971442) has received funding from the European Union's Horizon 2020 research and innovation programme (H2020-EU.3. - H2020-EU.2.1.). AB - This paper analytically studies the effect of radial engagement on chatter stability when the flexibility is perpendicular to the feed motion, with thin-walled part milling being the most relevant industrial case. By studying the mean directional factor and its harmonics, the superior stability of the up-milling strategy over down-milling for both Hopf and flip chatter is demonstrated. The optimal engagement for a theoretical infinite stable depth of cut Hopf is obtained, as well as the expressions for the critical depth of cut. For flip chatter, three different cutting zones with different lobe shapes can occur depending on the radial engagement. It is also shown that while flip chatter cannot be completely eliminated by tuning the radial engagement alone, an engagement can be found in up-milling that maximises stability. Finally, the findings are validated through experimental tests. © 2024 The Author(s) LA - English DB - MTMT ER - TY - JOUR AU - Shen, Minghao AU - Dollar, Robert Austin AU - Molnár, Tamás Gábor AU - He, Chaozhe R. AU - Vahidi, Ardalan AU - Orosz, Gábor TI - Energy-Efficient Reactive and Predictive Connected Cruise Control JF - IEEE Transactions on Intelligent Vehicles J2 - IEEE Transactions on Intelligent Vehicles VL - 9 PY - 2024 IS - 1 SP - 944 EP - 957 PG - 14 SN - 2379-8858 DO - 10.1109/TIV.2023.3281763 UR - https://m2.mtmt.hu/api/publication/34686316 ID - 34686316 LA - English DB - MTMT ER - TY - JOUR AU - Szaksz, Bence Máté AU - Stépán, Gábor AU - Habib, Giuseppe TI - Dynamical integrity estimation in time delayed systems: A rapid iterative algorithm JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 571 PY - 2024 PG - 16 SN - 0022-460X DO - 10.1016/j.jsv.2023.118045 UR - https://m2.mtmt.hu/api/publication/34167992 ID - 34167992 N1 - Export Date: 2 October 2023 CODEN: JSVIA Correspondence Address: Szaksz, B.; Department of Applied Mechanics, Hungary; email: szaksz@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Virág, Ábris Dávid AU - Juhász, Zsolt AU - Kossa, Attila AU - Molnár, Kolos TI - Combining oscillatory shear rheometry and dynamic mechanical analysis to obtain wide-frequency master curves JF - POLYMER J2 - POLYMER VL - 295 PY - 2024 PG - 11 SN - 0032-3861 DO - 10.1016/j.polymer.2024.126742 UR - https://m2.mtmt.hu/api/publication/34676087 ID - 34676087 N1 - Export Date: 23 February 2024 CODEN: POLMA Correspondence Address: Molnár, K.; Department of Polymer Engineering, Műegyetem rkp. 3., Hungary; email: molnar@pt.bme.hu Funding details: Ohio State University, OSU Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, FK 138501, FK 142457, TKP-6-6/PALY-2021 Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding text 1: The research reported in this paper was supported by the National Research, Development and Innovation Office ( FK 138501 and FK 142457 ). Project no. TKP-6-6/PALY-2021 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund , financed under the TKP2021-NVA funding scheme. The authors are grateful for the kind help of Kristóf Molnár and the Biomacromolecular Engineering Research Group at the College of Food, Agricultural, and Environmental Sciences of The Ohio State University in the GPC/SEC analysis. Funding text 2: The research reported in this paper was supported by the National Research, Development and Innovation Office (FK 138501 and FK 142457). Project no. TKP-6-6/PALY-2021 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. The authors are grateful for the kind help of Kristóf Molnár and the Biomacromolecular Engineering Research Group at the College of Food, Agricultural, and Environmental Sciences of The Ohio State University in the GPC/SEC analysis. AB - In this paper, we present a novel approach combining widely available techniques, oscillatory shear rheometry and dynamic mechanical analysis to obtain wide-frequency range master curves. We carried out finite element analysis to investigate the influence of the specimen thickness and Poisson's ratio on the moduli measured with a shear sandwich clamp in solid-state. We demonstrated that the thickness/height ratio of the specimen greatly influences its shear stress state. Using polystyrene, which is a thermorheologically simple thermoplastic, we showed that continuous master curves can be generated from melt-state torsion and solid-state shear tests. Our results can facilitate the characterisation of polymers from viscous to elastic state and the development of test methods that use more accurate calculations. © 2024 The Authors LA - English DB - MTMT ER - TY - JOUR AU - Virág, Lilla AU - Egedy, Attila AU - Varga, Csilla AU - Erdős, Gergely AU - Berezvai, Szabolcs AU - Kovács, László AU - Ulbert, Zsolt TI - Determination of the most significant rubber components influencing the hardness of natural rubber (NR) using various statistical methods JF - HELIYON J2 - HELIYON VL - 10 PY - 2024 IS - 3 PG - 19 SN - 2405-8440 DO - 10.1016/j.heliyon.2024.e25170 UR - https://m2.mtmt.hu/api/publication/34539439 ID - 34539439 N1 - Department of MOL Hydrocarbon and Coal Processing, Research Centre for Biochemical, Environmental and Chemical Engineering, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, Veszprém, H8200, Hungary Department of Process Engineering, Research Centre for Biochemical, Environmental and Chemical Engineering, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, Veszprém, H8200, Hungary Sustainability Solutions Research Lab, Research Centre for Biochemical, Environmental and Chemical Engineering, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, Veszprém, H8200, Hungary ECon Engineering Kft, Kondorosi út 3, Budapest, H1116, Hungary Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary Export Date: 18 March 2024 Correspondence Address: Virág, L.; Department of MOL Hydrocarbon and Coal Processing, Egyetem Str. 10, Hungary; email: virag.lilla@mk.uni-pannon.hu LA - English DB - MTMT ER - TY - JOUR AU - Vizi, Máté Benjámin AU - Stépán, Gábor TI - Digital stability of the Furuta pendulum based on angle detection JF - JOURNAL OF VIBRATION AND CONTROL J2 - J VIB CONTROL VL - 30 PY - 2024 IS - 3-4 SP - 588 EP - 597 PG - 10 SN - 1077-5463 DO - 10.1177/10775463221148893 UR - https://m2.mtmt.hu/api/publication/33644687 ID - 33644687 LA - English DB - MTMT ER - TY - JOUR AU - Alan, Anil AU - Molnár, Tamás Gábor AU - Ames, Aaron D. AU - Orosz, Gábor TI - Parameterized Barrier Functions to Guarantee Safety Under Uncertainty JF - IEEE CONTROL SYSTEMS LETTERS J2 - IEEE CONTROL SYST LETT VL - 7 PY - 2023 SP - 2077 EP - 2082 PG - 6 SN - 2475-1456 DO - 10.1109/LCSYS.2023.3285188 UR - https://m2.mtmt.hu/api/publication/34034213 ID - 34034213 LA - English DB - MTMT ER - TY - JOUR AU - Alan, Anil AU - Molnár, Tamás Gábor AU - Das, Ersin AU - Ames, Aaron D. AU - Orosz, Gábor TI - Disturbance Observers for Robust Safety-Critical Control With Control Barrier Functions JF - IEEE CONTROL SYSTEMS LETTERS J2 - IEEE CONTROL SYST LETT VL - 7 PY - 2023 SP - 1123 EP - 1128 PG - 6 SN - 2475-1456 DO - 10.1109/LCSYS.2022.3232059 UR - https://m2.mtmt.hu/api/publication/33545107 ID - 33545107 LA - English DB - MTMT ER - TY - JOUR AU - Bártfai, András AU - Barrios, Asier AU - Dombóvári, Zoltán TI - Stability Analysis of a One Degree of Freedom Robot Model with Sampled Digital Acceleration Feedback Controller in Turning and Milling JF - JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS J2 - J COMPUT NONLIN DYN VL - 2022 IDETC-CIE Selected Papers from the MSNDC Conference PY - 2023 SP - 1 EP - 9 PG - 9 SN - 1555-1415 DO - 10.1115/1.4062229 UR - https://m2.mtmt.hu/api/publication/33769724 ID - 33769724 N1 - MTA-BME Lend€ulet Machine Tool Vibrations Research Group, Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, 1111, Hungary IDEKO, Dynamics and Control Department, Elgoibar, 20870, Spain Export Date: 26 May 2023 Correspondence Address: Bartfai, A.; MTA-BME Lend€ulet Machine Tool Vibrations Research Group, Hungary; email: andras.bartfai@mm.bme.hu AB - This study is interested in the stability of robots in machining. The goal is to improve the dynamic performance of robots using an additional acceleration signal fed back through the conventional built-in proportional-derivative controller provided by the manufacturer. The structure of the robot is modelled with a simple one degree of freedom lumped model and the control signals are fed back via a linear spring and damping. The time delays of feedback controllers are considered zero-order holds, which results in sawtooth-like time-periodic time delays. The resulting equation of motion is an advanced delay differential equation. The semidiscretization method is shown for such systems having multiple sampled digital delays and continuous delays. First, we establish the stable regions in the plane of the sampling delay and the gain of the acceleration signal without machining. Then we show the possibility to improve stability in turning and milling using the additional acceleration feedback controller compared to the cases without any controller or using only the built-in proportional-derivative controller. LA - English DB - MTMT ER - TY - JOUR AU - Bartos, M. AU - Habib, Giuseppe TI - Hybrid vibration absorber for self-induced vibration suppression: exact analytical formulation for acceleration feedback control JF - MECCANICA J2 - MECCANICA VL - 58 PY - 2023 IS - 12 SP - 2269 EP - 2289 PG - 21 SN - 0025-6455 DO - 10.1007/s11012-023-01731-9 UR - https://m2.mtmt.hu/api/publication/34434611 ID - 34434611 N1 - Department of Applied Mechanics, Faculty of Mechancial Engineering, Budapest University of Technology and Economics, Müegyetem rkp. 5, Budapest, 1111, Hungary Swiss Federal Institute of Technology in Zürich (ETH Zürich), Rämistrasse 101, Zürich, 8092, Switzerland MTA-BME Lendület “Momentum” Global Dynamics Research Group, Budapest University of Technology and Economics, Müegyetem rkp. 5, Budapest, 1111, Hungary Export Date: 14 December 2023 CODEN: MECCB Correspondence Address: Habib, G.; MTA-BME Lendület “Momentum” Global Dynamics Research Group, Müegyetem rkp. 5, Hungary; email: habib@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Beer, T. AU - Stautner, M. AU - Beudaert, X. AU - Gil, M. AU - Dombóvári, Zoltán AU - Plakhotnik, D. TI - IMPLEMENTING OF PHOTOREALISTIC SURFACE RENDERING IN CAM SIMULATION JF - MM Science Journal J2 - MM Science Journal VL - 2023 PY - 2023 IS - Special Issue SP - 6921 EP - 6929 PG - 9 SN - 1803-1269 DO - 10.17973/MMSJ.2023_11_2023112 UR - https://m2.mtmt.hu/api/publication/34406973 ID - 34406973 N1 - ModuleWorks GmbH, Aachen, Germany Hochschule Ruhr West, Muehlheim, Germany IDEKO S Coop, Elgoibar, Spain Budapest University of Technology and Economics, Budapest, Hungary University of Twente, Enschede, Netherlands Export Date: 30 November 2023 Correspondence Address: Plakhotnik, D.; ModuleWorks GmbHGermany; email: denys@moduleworks.com AB - In this paper, different approaches to visualize CAM simulation results are presented. Simulated machined surfaces can be rendered in a photorealistic manner taking into account real tool motions and vibrations measured during the machining process. The actual tool trajectories are used to derive the microrelief of machined surface that lead to different reflective properties to be used in the CAM surface rendering pipeline. Broaching and grinding were two machining processes to adopt this photorealistic visualization. First, the generic CAM simulation computed the triangulated representation of the inprocess workpiece. Second, the triangles were enriched with the computed micro topography information that is used by the developed shader implementation during the visualization process. LA - English DB - MTMT ER - TY - JOUR AU - Beregi, Sándor AU - Avedisov, Sergei S AU - He, Chaozhe R AU - Takács, Dénes AU - Orosz, Gábor TI - Connectivity-Based Delay-Tolerant Control of Automated Vehicles: Theory and Experiments JF - IEEE Transactions on Intelligent Vehicles J2 - IEEE Transactions on Intelligent Vehicles VL - 8 PY - 2023 IS - 1 SP - 275 EP - 289 PG - 15 SN - 2379-8858 DO - 10.1109/TIV.2021.3131957 UR - https://m2.mtmt.hu/api/publication/32653366 ID - 32653366 N1 - Budapest University of Technology and Economics, Department of Applied Mechanics, Budapest, H-1111, Hungary University of Bristol, Department of Engineering Mathematics, Bristol, BS8 1TW, United Kingdom University of Michigan, Department of Mechanical Engineering, Ann Arbor, MI 48109, United States Toyota Motor North America R&D - Infotech Labs, Mountain View, CA 94043, United States Plus.ai Inc., Cupertino, CA 95014, United States MTA-BME Research Group on Dynamics of Machines and Vehicles, Budapest, H-1111, Hungary University of Michigan, Department of Civil and Environmental Engineering, Ann Arbor, MI 48109, United States Correspondence Address: Takacs, D.; Budapest University of Technology and Economics, Hungary; email: takacs@mm.bme.hu AB - The concept of utilizing vehicle-to-everything (V2X) connectivity to improve the resilience of automated vehicles in an environment where optical sensors may not provide reliable data is investigated. Longitudinal and lateral controllers are designed to enable a connected automated vehicle (CAV) to utilize V2X information from nearby connected human-driven vehicles (CHVs). The linear stability of the controllers are investigated theoretically while taking into account the time delays in the feedback loops. Novel performance measures are introduced to quantify the plant and string stability properties of the longitudinal controller from experimental data. The stability of the lateral controller is also evaluated in lane-keeping experiments. The robustness of the designed controllers against latency is demonstrated and the performance of the overall systems is showcased experimentally using real vehicles on a test track. LA - English DB - MTMT ER - TY - JOUR AU - Béri, Bence AU - Stépán, Gábor TI - Effect of axial force on the stability of milling: Local bifurcations around stable islands JF - JOURNAL OF VIBRATION AND CONTROL J2 - J VIB CONTROL VL - 29 PY - 2023 IS - 1-2 SP - 440 EP - 452 PG - 13 SN - 1077-5463 DO - 10.1177/10775463211048256 UR - https://m2.mtmt.hu/api/publication/32510579 ID - 32510579 N1 - Funding Agency and Grant Number: New National Excellence Program of the Ministry for Innovation and Technology from the national research, development and innovation fund [UNKP-20-3]; NRDI Fund (TKP2020 NC) of the Ministry for Innovation and TechnologyNational Research, Development & Innovation Office (NRDIO) - Hungary [BMENC]; Hungarian National Research, Development and Innovation OfficeNational Research, Development & Innovation Office (NRDIO) - Hungary [NKFI-K-132477, NKFI-KKP-133846] Funding text: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the UNKP-20-3 New National Excellence Program of the Ministry for Innovation and Technology from the source of the national research, development and innovation fund, by the NRDI Fund (TKP2020 NC,Grant No. BMENC) based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology and by the Hungarian National Research, Development and Innovation Office (NKFI-K-132477 and NKFI-KKP-133846). AB - In this paper, the stability properties of milling processes are presented when the axial component of the cutting force is also taken into account as a compressive force acting on the cutting tool. The mechanism of the material removal operation is described by a one degree-of-freedom oscillator subjected to the so-called surface regeneration effect. This can be represented mathematically by a nonlinear, time-periodic, delay differential equation. The regenerative compression affects the natural frequency of the system, which is modelled through the lateral stiffness variation of the bearing support of the main spindle. This extension of the general milling model leads to the birth of stable islands within the originally unstable parameter domain. Since the exploitation of these regions may open new ways in practice for increasing the efficiency of machining, the domain of attraction is investigated qualitatively near the stability boundaries of the stable island by means of a semi-analytical method. LA - English DB - MTMT ER - TY - JOUR AU - Béri, Bence AU - Bachrathy, Dániel AU - Stépán, Gábor TI - Multi-Dimensional Bisection Method in HIL Environment: Stability and Chatter Prediction in Turning JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 67 PY - 2023 IS - 3 SP - 169 EP - 174 PG - 6 SN - 0324-6051 DO - 10.3311/PPme.19579 UR - https://m2.mtmt.hu/api/publication/33847453 ID - 33847453 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI-KKP-133846, NKFI-K-132477, FK-138500] Funding text: Acknowledgement The research reported in this paper has been supported by the Hungarian National Research, Development and Innovation Office (NKFI-KKP-133846, NKFI-K-132477 and FK-138500) . AB - In turning operations, the harmful small-amplitude but high-frequency chatter vibrations are identified in hardware-in-the-loop (HIL) experimental environment by means of the application of a multi-dimensional bisection method. The dummy workpiece clamped to the real main spindle is excited by contactless electromagnetic actuators and the response of the workpiece is detected by laser-based sensors. According to the present and the stored previous positions of the rotating workpiece, the desired cutting force characteristic along with the surface regeneration effect can be emulated by means of a high-performance real target computer. While the conventional experimental results in the HIL environment identify the stability limits of the cutting operation accurately only in a high-resolution grid of the technological parameters, the embedded bisection method reduces significantly both the size of the required grid and the time duration of the measurement by path following the boundaries of the linear loss of stability. Based on this technique, the experimental stability boundary of the emulated turning process is presented in a wide range of spindle speeds. LA - English DB - MTMT ER - TY - JOUR AU - Bodor, Bálint AU - Bencsik, László TI - Variational Principles for the Trajectory Tracking Control of Underactuated Mechanical Systems JF - JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS J2 - J COMPUT NONLIN DYN VL - 18 PY - 2023 IS - 6 PG - 10 SN - 1555-1415 DO - 10.1115/1.4056593 UR - https://m2.mtmt.hu/api/publication/33563467 ID - 33563467 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund; [BME-NVA-02]; [TKP2021-EGA-02] Funding text: National Research, Development and Innovation Fund(Grant Nos. BME-NVA-02 and TKP2021-EGA-02; FunderID: 10.13039/100009567). AB - Robotics is undergoing dynamic progression with the spread of soft robots and compliant mechanisms. The mechanical models describing these systems are underactuated, having more degrees-of-freedom than inputs. The trajectory tracking control of underactuated systems is not straightforward. The solution of the inverse dynamics is not stable in all cases, as it only considers the actual state of the system. Therefore employing the advances of optimal control theory is a reasonable choice. However, the real-time application of these is challenging as the solution to the discretized optimization problems is numerically expensive. This paper presents a novel iterative approach to solving nonlinear optimal control problems. The authors first define the iteration formula after which the obtained equations are discretized to prepare the numerical solution, contrarily to the accessible works in the literature having reverse order. The main idea is to approximate the cost functional with a second-order expansion in each iteration step, which is then extremized to get the subsequent approximation of the optimum. In the case of nonlinear optimal control problems, the process leads to a sequence of time-variant linear-quadratic regulator (LQR) problems. The proposed technique was effectively applied to the trajectory tracking control of a flexible rotational-rotational joint (RR) manipulator. The case study showed that the initialization of the iteration is simple, and the convergence is rapid. LA - English DB - MTMT ER - TY - JOUR AU - Dekemele, Kevin AU - Habib, Giuseppe TI - Inverted resonance capture cascade: modal interactions of a nonlinear energy sink with softening stiffness JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 9839 EP - 9861 PG - 23 SN - 0924-090X DO - 10.1007/s11071-023-08423-9 UR - https://m2.mtmt.hu/api/publication/33797918 ID - 33797918 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics. Giuseppe Habi; National Research, Development and Innovation Fund [BME-NVA-02, TKP2021-EGA-02]; Ministry of Innovation and Technology financed [TKP2021]; National Research, Development and Innovation Office [NKFI-134496] Funding text: Open access funding provided by Budapest University of Technology and Economics. Giuseppe Habib acknowledges the financial support of the National Research, Developmentand Innovation Fund (Grant no. BME-NVA-02 and TKP2021-EGA-02) provided by the Ministry of Innovation and Technology financed under the TKP2021 funding scheme and by the National Research, Development and Innovation Office (Grantno. NKFI-134496). AB - Nonlinear energy sinks (NESs) are broadband passive vibration absorbers that are nonlinearly connected to a host system. If an NES is attached to a multi-degree-of-freedom mechanical host system under transient loading, the vibrations in the host system will transfer to and dissipate in the NES. During this transfer, the NES sequentially resonates with the modal frequencies of the host system, dissipating one mode at a time. This phenomenon is called resonance capture cascade (RCC). So far, RCC has only been investigated for NESs with a hardening nonlinear stiffness. Because of this stiffness, the transfer of modal vibrations happens from high to low frequency. In this study, an NES with a softening stiffness is proposed. Investigating the slow invariant manifolds reveals that an inverted resonance capture cascade occurs, where the transfer of vibrations to the NES is from low to high frequency. The analysis is carried out by exploiting high-dimensional slow invariant manifolds. The proposed NES is compared to the conventional NES with hardening stiffness. LA - English DB - MTMT ER - TY - JOUR AU - Dobák, Dávid AU - Csernák, Gábor TI - Negyed és fél járműmodell identifikációjának GP-LFM technikával való megvalósíthatósága JF - MESTERSÉGES INTELLIGENCIA J2 - MESTERS INTELL VL - 5 PY - 2023 IS - 1 SP - 35 EP - 49 PG - 15 SN - 2676-9611 DO - 10.35406/MI.2023.1.35 UR - https://m2.mtmt.hu/api/publication/34060225 ID - 34060225 AB - Napjainkban a dinamikai rendszerek identifikációja a magas minőségi követelmények miatt fontosabb, mint valaha. A járműiparnak biztonságkritikus területként különösen magas az igénye az olyan eljárásokra, melyekkel leszoríthatók a tesztelés magas költségei. Mivel Magyarország az egyik legnagyobb járműipari beszállító Európában, a mérnököknek ismerniük kell a korszerű technikákat. Cikkünkben demonstráljuk az ún. Gaussian Process – Latent Force Model (GP-LFM) technika hatékonyságát az egy szabadsági fokú negyed járműmodellen keresztül. Bemutatjuk és egyben általánosítjuk az elméletet több szabadsági fokú rendszerek identifikációjához, amely a későbbiekben lehetővé teszik a komplexebb rendszerek, például a fél járműmodell identifikációját. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dombóvári, Zoltán AU - Tóth, Rudolf AU - Iglesias, A. AU - Bachrathy, Dániel AU - Stépán, Gábor TI - Flip-validated milling process in hardware-in-the-loop environment JF - CIRP ANNALS-MANUFACTURING TECHNOLOGY J2 - CIRP ANN-MANUF TECHN VL - 72 PY - 2023 IS - 1 SP - 369 EP - 372 PG - 4 SN - 0007-8506 DO - 10.1016/j.cirp.2023.04.089 UR - https://m2.mtmt.hu/api/publication/33797882 ID - 33797882 N1 - MTA-BME Lendület Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, H-1521, Hungary Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, Hungary Ideko – Member of BRTA, Dynamics & Control, Basque Country, Elgoibar, Spain Export Date: 5 May 2023 CODEN: CIRAA Correspondence Address: Dombovari, Z.; MTA-BME Lendület Machine Tool Vibration Research Group, Hungary; email: dombovari@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Floch, Kristóf AU - Kossa, Attila TI - Motion Tracker Beta: A GUI based open-source motion tracking application JF - SOFTWAREX J2 - SOFTWAREX VL - 23 PY - 2023 SN - 2352-7110 DO - 10.1016/j.softx.2023.101424 UR - https://m2.mtmt.hu/api/publication/34022861 ID - 34022861 N1 - Export Date: 22 June 2023 Correspondence Address: Floch, K.; Department of Applied Mechanics, Hungary; email: kristof.floch@edu.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Fodor, Gergő AU - Sykora, Henrik Tamás AU - Bachrathy, Dániel TI - Collocation method for stochastic delay differential equations JF - PROBABILISTIC ENGINEERING MECHANICS J2 - PROBABILIST ENG MECH VL - 74 PY - 2023 PG - 8 SN - 0266-8920 DO - 10.1016/j.probengmech.2023.103515 UR - https://m2.mtmt.hu/api/publication/34124575 ID - 34124575 N1 - Funding Agency and Grant Number: Hungar-ian Scientific Research Fund [OTKA FK-138500] Funding text: The research leading to these results was supported by the Hungar-ian Scientific Research Fund (OTKA FK-138500) . AB - In this work, we present a collocation-based numerical approach for handling stochastic delay differential equations. We approximate the solution function, and after that, we carry out integrations between the predefined collocation points to achieve a mapping from the delayed state to the present state. We build the first and second moment mapping matrices based on the mapping, and we utilize the matrices to approximate the stationary first and second moments and their stability. Numerical studies of a first and second-order stochastic delay differential equation show the convergence and time complexity of the stochastic collocation method. The last section covers the issues and possible further improvements of the method. LA - English DB - MTMT ER - TY - JOUR AU - Gábos, Zoltán AU - Plakhotnik, D. AU - Dombóvári, Zoltán TI - DIGITAL GEOMETRY GENERATION OF HIGH PRECISION BROACHING TOOL CUTTING EDGES THROUGH IMAGE PROCESSING ALGORITHM JF - MM Science Journal J2 - MM Science Journal VL - 2023 PY - 2023 IS - Special Issue SP - 7014 EP - 7020 PG - 7 SN - 1803-1269 DO - 10.17973/MMSJ.2023_11_2023124 UR - https://m2.mtmt.hu/api/publication/34406972 ID - 34406972 N1 - Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest, H-1111, Hungary MTA-BME Lendület Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, H-1521, Hungary ModuleWorks GmbH, Aachen, Germany University of Twente, Enschede, Netherlands Export Date: 30 November 2023 Correspondence Address: Gabos, Z.; Department of Applied Mechanics, Műegyetem rkp. 3, Hungary; email: zoltan.gabos@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Gábos, Zoltán AU - Barton, David A.W. AU - Dombóvári, Zoltán TI - Equation-free bifurcation analysis of a stochastically excited Duffing oscillator JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 547 PY - 2023 PG - 20 SN - 0022-460X DO - 10.1016/j.jsv.2022.117536 UR - https://m2.mtmt.hu/api/publication/33536357 ID - 33536357 N1 - Funding Agency and Grant Number: European Union [958357] Funding text: This project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under grantagreement No. 958357 (InterQ), and it is an initiative of the Factories-of-the-Future (FoF) Public Private Partnership LA - English DB - MTMT ER - TY - JOUR AU - Genda, A. AU - Stépán, Gábor TI - On the stability of bodies suspended asymmetrically with an inelastic rope JF - ACTA MECHANICA J2 - ACTA MECH VL - 234 PY - 2023 SP - 3009 EP - 3018 PG - 10 SN - 0001-5970 DO - 10.1007/s00707-023-03546-x UR - https://m2.mtmt.hu/api/publication/33742873 ID - 33742873 N1 - Correspondence Address: Genda, A.; Institute of Engineering Mechanics, Kaiserstr. 12, Germany; email: attila.genda@kit.edu LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe TI - Predicting saddle-node bifurcations using transient dynamics: a model-free approach JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 20579 EP - 20596 PG - 18 SN - 0924-090X DO - 10.1007/s11071-023-08941-6 UR - https://m2.mtmt.hu/api/publication/34207865 ID - 34207865 N1 - Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület “Momentum” Global Dynamics Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary Correspondence Address: Habib, G.; MTA-BME Lendület “Momentum” Global Dynamics Research Group, Műegyetem rkp. 3., Hungary; email: habib@mm.bme.hu AB - This paper proposes a novel method for predicting the presence of saddle-node bifurcations in dynamical systems. The method exploits the effect that saddle-node bifurcations have on transient dynamics in the surrounding phase space and parameter space, and does not require any information about the steady-state solutions associated with the bifurcation. Specifically, trajectories of a system obtained for parameters close to the saddle-node bifurcation present local minima of the logarithmic decrement trend in the vicinity of the bifurcation. By tracking the logarithmic decrement for these trajectories, the saddle-node bifurcation can be accurately predicted. The method does not strictly require any mathematical model of the system, but only a few time series, making it directly implementable for gray- and black-box models and experimental apparatus. The proposed algorithm is tested on various systems of different natures, including a single-degree-of-freedom system with nonlinear damping, the mass-on-moving-belt, a time-delayed inverted pendulum, and a pitch-and-plunge wing profile. Benefits, limitations, and future perspectives of the method are also discussed. The proposed method has potential applications in various fields, such as engineering, physics, and biology, where the identification of saddle-node bifurcations is crucial for understanding and controlling complex systems. LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe AU - Epasto, Alberto TI - Towed wheel shimmy suppression through a nonlinear tuned vibration absorber JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 8973 EP - 8986 PG - 14 SN - 0924-090X DO - 10.1007/s11071-023-08314-z UR - https://m2.mtmt.hu/api/publication/33672828 ID - 33672828 N1 - Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, 1111, Hungary MTA-BME Lendület “Momuntum” Global Dynamics Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, 1111, Hungary Department of Mechanical and Aerospace Engineering, Sapienza – University of Rome, Rome, Italy Correspondence Address: Habib, G.; MTA-BME Lendület “Momuntum” Global Dynamics Research Group, Műegyetem rkp. 3., Hungary; email: habib@mm.bme.hu AB - The implementation of the nonlinear tuned vibration absorber (NLTVA) for the suppression of shimmy vibration in towed wheels is addressed in this study. We adopt a modified straight tangent tyre model of a single-degree-of-freedom towed wheel system with an attached NLTVA. Stability analysis illustrated that the NLTVA can significantly improve the stability of the equilibrium of the wheel. Bifurcation analysis highlighted the existence of large bistable regions, which undermines the system’s safety. However, numerical continuation analysis, coupled with a dynamical integrity investigation, revealed that the addition of an intentional softening nonlinearity in the absorber restoring force characteristic enables the complete suppression of the bistable regions, also reducing the amplitude of shimmy oscillations in the unstable region. Quasiperiodic motions were also identified; however, their practical relevance seems marginal. LA - English DB - MTMT ER - TY - JOUR AU - Hajdu, Dávid AU - Bachrathy, Dániel TI - Active vibration control for milling operations including frequency response function uncertainties JF - PROCEDIA CIRP J2 - PROCEDIA CIRP VL - 117 PY - 2023 SP - 181 EP - 186 PG - 6 SN - 2212-8271 DO - 10.1016/j.procir.2023.03.032 UR - https://m2.mtmt.hu/api/publication/33800449 ID - 33800449 N1 - Correspondence Address: Hajdu, D.; Budapest University of Technology and Economics, Hungary; email: hajdu@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Hajdu, Dávid AU - Astarloa, Asier AU - Kovacs, Istvan AU - Dombóvári, Zoltán TI - The curved uncut chip thickness model: A general geometric model for mechanistic cutting force predictions JF - INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE J2 - INT J MACH TOOL MANU VL - 188 PY - 2023 PG - 16 SN - 0890-6955 DO - 10.1016/j.ijmachtools.2023.104019 UR - https://m2.mtmt.hu/api/publication/33796393 ID - 33796393 N1 - Funding Agency and Grant Number: Ministry for Innova-tion and Technology [2019-2.1.2-NEMZ-2019-00005]; Hungarian National Research, Development and Innovation Office; CDTI-acreditacion y concesion de ayudas destinadas a centros tecnologicos de excelencia cervera; Ministry for Innovation and Technology; [EUROSTARS FORTH E!12998]; [NKFI PD-137673]; [CER-20191001] Funding text: The research reported in this paper has been supported by the project EUROSTARS FORTH E!12998, by the Ministry for Innovation and Technology (2019-2.1.2-NEMZ-2019-00005) and by the Hungarian National Research, Development and Innovation Office (NKFI PD-137673) . This research work has been done under the framework of the project MIRAGED: Posicionamiento estrategico en modelos virtuales y gemelos digitales para una industria 4.0 (CER-20191001) , supported by CDTI-acreditacion y concesion de ayudas destinadas a centros tecnologicos de excelencia cervera. LA - English DB - MTMT ER - TY - JOUR AU - Hauck, Bence AU - Szekrényes, András TI - Fracture mechanical finite element analysis for delaminated composite plates applying the first-order shear deformation plate theory JF - COMPOSITE STRUCTURES J2 - COMPOS STRUCT VL - 308 PY - 2023 PG - 14 SN - 0263-8223 DO - 10.1016/j.compstruct.2023.116719 UR - https://m2.mtmt.hu/api/publication/33648736 ID - 33648736 N1 - CODEN: COMSE Correspondence Address: Hauck, B.; Department of Applied Mechanics, 5 Műegyetem rkp., Hungary; email: bence.hauck@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Heitz, T. AU - Bachrathy, Dániel AU - He, N. AU - Chen, N. AU - Stépán, Gábor TI - Optimization of cutting force fitting model by Fast Fourier Transformation in milling JF - JOURNAL OF MANUFACTURING PROCESSES J2 - J MANUFACT PROCES VL - 99 PY - 2023 SP - 121 EP - 137 PG - 17 SN - 1526-6125 DO - 10.1016/j.jmapro.2023.05.046 UR - https://m2.mtmt.hu/api/publication/33939703 ID - 33939703 N1 - College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, 1111, Hungary Export Date: 1 June 2023 Correspondence Address: Bachrathy, D.; Department of Applied Mechanics, Hungary; email: bachrathy@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Hanna Zsófia AU - Takács, Dénes TI - Numerical Analysis on Shimmying Wheels with Dry Friction Damper JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 67 PY - 2023 IS - 2 SP - 118 EP - 126 PG - 9 SN - 0324-6051 DO - 10.3311/PPme.21072 UR - https://m2.mtmt.hu/api/publication/33698804 ID - 33698804 N1 - Funding Agency and Grant Number: Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences; National Research, Development and Innovation Office [NKFI-128422]; NRDI Fundd (TKP2021) under the Ministry for Innovation and Technology; Ministry for Innovation and Technology from the National Research, Development and Innovation Fund [BME-NVA-02]; [NKP-21-3]; [2020-1.2.4-TET-IPARI-2021-00012] Funding text: The research reported in this paper was partly supported by the Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences. The research carried out at BME has been supported by the National Research, Development and Innovation Office under grant no. NKFI-128422 and under grant no. 2020-1.2.4-TET-IPARI-2021-00012, as well as by the NRDI Fund (TKP2021, Project no. BME-NVA-02) based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology. Supported by the ?NKP-21-3 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. AB - The dynamics of the 1.5-degree-of-freedom model of towed wheel is investigated. Dry friction at the king pin is considered, leading to a non-smooth dynamical system. Beyond analytical and numerical linear stability analysis, the nonlinear vibrations are investigated by numerical bifurcation analysis with smoothing and by numerical simulations with event handling. The effect of dry friction at the king pin on the birth of separated periodic branches is presented on bifurcation diagrams. The presence of bistable parameter domains is also shown. The effect of smoothing is investigated by comparing bifurcation diagrams of the smoothed and the original non-smooth systems. LA - English DB - MTMT ER - TY - JOUR AU - Kádár, Fanni AU - Stépán, Gábor TI - Nonlinear dynamics and safety aspects of pressure relief valves JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 12017 EP - 12032 PG - 16 SN - 0924-090X DO - 10.1007/s11071-023-08484-w UR - https://m2.mtmt.hu/api/publication/33834357 ID - 33834357 N1 - Correspondence Address: Kadar, F.; MTA-BME Lendület Momentum Global Dynamics Research Group, Hungary; email: fanni.kadar@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Kádár, Fanni AU - Stépán, Gábor TI - An implicit system of delay differential algebraic equations from hydrodynamics JF - ELECTRONIC JOURNAL OF QUALITATIVE THEORY OF DIFFERENTIAL EQUATIONS J2 - ELECTRON J QUAL THEOR DIFFER EQUAT VL - 2023 PY - 2023 IS - 28 SP - 1 EP - 8 PG - 8 SN - 1417-3875 DO - 10.14232/ejqtde.2023.1.28 UR - https://m2.mtmt.hu/api/publication/34094268 ID - 34094268 N1 - Export Date: 14 August 2023 Correspondence Address: Kádár, F.; Budapest University of Technology and Economics, Műegyetem rakpart 5, Hungary; email: fanni.kadar@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Kiss, Ádám AU - Molnár, Tamás Gábor AU - Ames, A.D. AU - Orosz, Gábor TI - Control barrier functionals: Safety-critical control for time delay systems JF - INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL J2 - INT J ROBUST NONLIN VL - 33 PY - 2023 IS - 12 SP - 7282 EP - 7309 PG - 28 SN - 1049-8923 DO - 10.1002/rnc.6751 UR - https://m2.mtmt.hu/api/publication/33879846 ID - 33879846 N1 - MTA-BME Lendület Machine Tool Vibration Research Group, Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, CA, United States Department of Mechanical Engineering and Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI, United States Correspondence Address: Kiss, A.K.; MTA-BME Lendület Machine Tool Vibration Research Group, Hungary; email: kiss_a@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Kossa, Attila AU - Hensel, René AU - McMeeking, Robert M. TI - Adhesion of a cylindrical punch with elastic properties that vary radially JF - MECHANICS RESEARCH COMMUNICATIONS J2 - MECH RES COMMUN VL - 130 PY - 2023 PG - 7 SN - 0093-6413 DO - 10.1016/j.mechrescom.2023.104123 UR - https://m2.mtmt.hu/api/publication/33799832 ID - 33799832 N1 - Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, 1111, Hungary INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany Materials and Mechanical Engineering Departments, University of California, Santa Barbara, CA 93106, United States School of Engineering, Aberdeen University, King's College, Scotland, Aberdeen, AB24 3UE, United Kingdom Correspondence Address: Kossa, A.; Department of Applied Mechanics, Műegyetem rkp. 3., Hungary; email: kossa@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Kossa, Attila AU - Valentine, Megan T. AU - McMeeking, Robert M. TI - Analysis of the compressible, isotropic, neo-Hookean hyperelastic model JF - MECCANICA J2 - MECCANICA VL - 58 PY - 2023 SP - 217 EP - 232 PG - 16 SN - 0025-6455 DO - 10.1007/s11012-022-01633-2 UR - https://m2.mtmt.hu/api/publication/33560659 ID - 33560659 AB - The most widely-used representation of the compressible, isotropic, neo-Hookean hyperelastic model is considered in this paper. The version under investigation is that which is implemented in the commercial finite element software ABAQUS, ANSYS and COMSOL. Transverse stretch solutions are obtained for the following homogeneous deformations: uniaxial loading, equibiaxial loading in plane stress, and uniaxial loading in plane strain. The ground-state Poisson’s ratio is used to parameterize the constitutive model, and stress solutions are computed numerically for the physically permitted range of its values. Despite its broad application to a number of engineering problems, the physical limitations of the model, particularly in the small to moderate stretch regimes, are not explored. In this work, we describe and analyze results and make some critical observations, underlining the model’s advantages and limitations. For example, a snap-back feature of the transverse stretch is identified in uniaxial compression, a physically undesirable behavior unless validated by experimental data. The domain of this non-unique solution is determined in terms of the ground-state Poisson’s ratio and the state of stretch and stress. The analyses we perform are essential to enable the understanding of the characteristics of the standard, compressible, isotropic, neo-Hookean model used in ABAQUS, ANSYS and COMSOL. In addition, our results provide a framework for the parameter-fitting procedure needed to characterize this standard, compressible, isotropic neo-Hookean model in terms of experimental data. LA - English DB - MTMT ER - TY - JOUR AU - Kwon, Younghoon AU - Seo, Soyoung E. AU - Lee, Jaejun AU - Berezvai, Szabolcs AU - Read de Alaniz, Javier AU - Eisenbach, Claus D. AU - McMeeking, Robert M. AU - Hawker, Craig J. AU - Valentine, Megan T. TI - 3D-printed polymer foams maintain stiffness and energy dissipation under repeated loading JF - COMPOSITES COMMUNICATIONS J2 - COMPOS COMMUN VL - 37 PY - 2023 PG - 5 SN - 2452-2139 DO - 10.1016/j.coco.2022.101453 UR - https://m2.mtmt.hu/api/publication/33533259 ID - 33533259 N1 - Funding Agency and Grant Number: MRSEC Program of the National Science Foundation (NSF); U.S. Army Research Office [DMR 1933487]; Hungarian National Research, Development and Innovation Office [DMR 1720256 (IRG-3)]; University of California, Santa Barbara; Uni- versity of California, Office of the President and Mechanical Test Lab of the UCSB Mechanical Engineering Department; NSF; [W911NF-19-2-0026]; [NKFI-PD 137806] Funding text: This work was supported by the MRSEC Program of the National Science Foundation (NSF) under Award No. DMR 1720256 (IRG-3). SES and CJH acknowledge support by the U.S. Army Research Office under Cooperative Agreement W911NF-19-2-0026 for the Institute for Collaborative Biotechnologies. This research was supported by the Hungarian National Research, Development and Innovation Office (Grant no. NKFI-PD 137806). The authors acknowledge the use of the Microfluidics Laboratory within the California NanoSystems Institute, supported by the University of California, Santa Barbara and the University of California, Office of the President and Mechanical Test Lab of the UCSB Mechanical Engineering Department, and leveraged resources provided by NSF Award No. DMR 1933487. Authors appreciate useful discussions with Christopher Barney, Juan Manuel Uruena, David Bothman and Kirk Fields. LA - English DB - MTMT ER - TY - JOUR AU - Lu, Hangyu AU - Lu, Jianwei AU - Stépán, Gábor AU - Takács, Dénes TI - Stability Analysis and Optimization of Vehicle Active Motion Control System with Feedback Time Delay JF - LECTURE NOTES IN MECHANICAL ENGINEERING J2 - LECT NOTES MECHAN ENG VL - Vehicle and Automotive Engineering 4 PY - 2023 SP - 111 EP - 125 PG - 15 SN - 2195-4356 DO - 10.1007/978-3-031-15211-5_10 UR - https://m2.mtmt.hu/api/publication/33151748 ID - 33151748 N1 - Megjelent a Vehicle and Automotive Engineering 4 c. kötetben, Softcover ISBN: 978-3-031-15210-8 (Published: 10 September 2022), eBook ISBN: 978-3-031-15211-5 (Published: 09 September 2022), Copyright Year: 2023 Befoglalója: 33072528. Hefei University of Technology, Hefei, 230000, China Budapest University of Technology and Economics, Budapest, 1111, Hungary MTA-BME Research Group on Dynamics of Machines and Vehicles, Budapest, 1111, Hungary Correspondence Address: Lu, H.; Hefei University of TechnologyChina; email: tcsn117@163.com WoS:hiba:000926145500010 2023-12-31 12:17 típus nem egyezik AB - A delayed dynamic model of vehicle lateral motion system is established to investigate the vehicle dynamics under time delay and to optimize the effect of time delay. The dynamic model is based on the non-linear 2-dimensional vehicle equation of motions and includes an active PD torque controller with feedback time delay. The wheel rotational dynamics and the longitudinal-lateral tyre force coupling are also modelled regarding the deformation delay induced by tyre elasticity. Phase plane analysis is carried out to acquire the handling and stability properties of the uncontrolled vehicle, and on this basis, the stability analysis of the delayed system is conducted and summarized in the stability chart of two control parameters, which shows the effects of time delay on vehicle system in various driving conditions and handling characteristics. Finally, simulations validate that the stability analysis for the controlled system dynamics and the eigenvalue-based optimization method performs effectively, which can be used for many considerations in vehicle delayed systems both from theoretical and practical viewpoints. LA - English DB - MTMT ER - TY - JOUR AU - Martinovich, Kristóf AU - Kiss, Ádám TI - Nonlinear effects of saturation in the car-following model JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 2555 EP - 2569 PG - 15 SN - 0924-090X DO - 10.1007/s11071-022-07951-0 UR - https://m2.mtmt.hu/api/publication/33154473 ID - 33154473 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics; Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund [TKP2021] Funding text: Open access funding provided by Budapest University of Technology and Economics. The research reported in this paper is part of project no. BME-NVA-02, implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, and financed under the TKP2021 funding scheme. AB - The goal of this paper is to provide insight about the effect of acceleration saturation in the car-following model. In this contribution, we consider a heterogeneous, mixed-traffic scenario which contains both human-driven and autonomous vehicles subjected to time delays. Corresponding stability charts are provided from which one can tune the control parameters of the automated vehicles to achieve smooth traffic flow. By taking into account the acceleration saturation, it modifies the global behaviour of the system and reduces the range of the optimal technological parameters. On a demonstrative example, we highlight the complex dynamical phenomenon induced by the saturation and we attempt to connect these nonlinear investigations to the engineering practice and point out their relevance. LA - English DB - MTMT ER - TY - JOUR AU - Mihályi, Levente AU - Takács, Dénes TI - Linear Stability of Reversing a Car-trailer Combination JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 67 PY - 2023 IS - 2 SP - 87 EP - 93 PG - 7 SN - 0324-6051 DO - 10.3311/PPme.18971 UR - https://m2.mtmt.hu/api/publication/33761882 ID - 33761882 N1 - Export Date: 26 May 2023 CODEN: PPMMB Correspondence Address: Mihályi, L.; Department of Applied Mechanics, Műegyetem rkp. 3, Hungary; email: mihalyi@mm.bme.hu AB - In this paper, we investigate the reverse motion of a car-trailer combination. The single track model of the vehicle is used with quasi-static tire model to design a simple linear feedback controller that can achieve stable reversing motion along a straight path. The linear stability of the closed-loop system is analyzed by constructing stability charts in the plane of the control gains. The effect of the reversing speed of the vehicle on the stability is also shown. In order to validate the theoretical results, laboratory experiments are carried out using a small-scale vehicle and a conveyor belt. LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Tamás Gábor AU - Tighe, Katherine AU - Ubellacker, Wyatt AU - Kalantari, Arash AU - Ames, Aaron D. TI - Mechanical Design, Planning, and Control for Legged Robots in Distillation Columns JF - JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS J2 - J COMPUT NONLIN DYN VL - 18 PY - 2023 IS - 6 SP - 061001 SN - 1555-1415 DO - 10.1115/1.4056659 UR - https://m2.mtmt.hu/api/publication/34034212 ID - 34034212 AB - Dexterous robots have great potential to execute industrial tasks that are not suited to humans. In this work, a novel robotic mobility platform is proposed for use in the chemical industry to enable autonomous distillation column inspection—a tedious and dangerous task for humans. A roller arm mechanism is designed for a quadrupedal robot that enables moving across the distillation column. Required dynamic behaviors are generated with full-body motion planning and low-level control. The holistic process of mechanical design, planning, and control leads to desired behavior, as demonstrated by high-fidelity simulations. This marks a key step toward operating legged robots inside distillation columns. LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Tamás Gábor AU - Kiss, Ádám AU - Ames, Aaron D. AU - Orosz, Gábor TI - Safety-Critical Control With Input Delay in Dynamic Environment JF - IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY J2 - IEEE T CONTR SYST T VL - 31 PY - 2023 IS - 4 SP - 1507 EP - 1520 PG - 14 SN - 1063-6536 DO - 10.1109/TCST.2022.3227451 UR - https://m2.mtmt.hu/api/publication/33570451 ID - 33570451 N1 - This research is supported in part by the National Science Foundation (CPS Award #1932091), Aerovironment and Dow (#227027AT), and supported by the NRDI Fund (TKP2020 IES, Grant No. BME-IE-MIFM and TKP2020 NC, Grant No. BME-NC). LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Dalma AU - Insperger, Tamás TI - The Critical Length is a Good Measure to Distinguish between Stick Balancing in the ML and AP Directions JF - PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING J2 - PERIOD POLYTECH MECH ENG VL - 67 PY - 2023 IS - 4 SP - 303 EP - 314 PG - 12 SN - 0324-6051 DO - 10.3311/PPme.22937 UR - https://m2.mtmt.hu/api/publication/34289794 ID - 34289794 N1 - Export Date: 14 December 2023 CODEN: PPMMB Correspondence Address: Insperger, T.; Department of Applied Mechanics, Műegyetem rkp. 5., Hungary; email: insperger@mm.bme.hu AB - Seven novice subjects participated in experiments of stick balancing on a linear track in the anterior-posterior (AP) and the medio-lateral (ML) directions. The goal of the experiments was to test how the depth perception in the subjects' AP direction affects balancing performance compared to balancing in the ML direction, where depth perception does not play a role. It is easier to balance longer sticks than shorter ones, therefore balancing performance is measured by the length of the shortest stick that subjects can balance. Subjects were found to be able to balance shorter sticks in the ML direction than in the AP direction: the ratio of the shortest stick lengths in the ML direction relative to the AP direction was in average 0.53. Thus, the additional challenge posed by depth perception in the AP direction is clearly observable. Additionally, repeated trials were carried out for 5 consecutive days to assess the development of balancing skill by using stabilometry analysis. The maximal balance time of the subjects significantly increased with the days of practice. LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Dalma AU - Milton, John G. AU - Insperger, Tamás TI - Controlling stick balancing on a linear track: Delayed state feedback or delay-compensating predictor feedback? JF - BIOLOGICAL CYBERNETICS J2 - BIOL CYBERN VL - 117 PY - 2023 SP - 113 EP - 127 PG - 15 SN - 0340-1200 DO - 10.1007/s00422-023-00957-w UR - https://m2.mtmt.hu/api/publication/33709666 ID - 33709666 N1 - Export Date: 7 September 2023 CODEN: BICYA Correspondence Address: Insperger, T.; Department of Applied Mechanics, Hungary; email: insperger@mm.bme.hu AB - A planar stick balancing task was investigated using stabilometry parameters (SP); a concept initially developed to assess the stability of human postural sway. Two subject groups were investigated: 6 subjects (MD) with many days of balancing a 90 cm stick on a linear track and 25 subjects (OD) with only one day of balancing experience. The underlying mechanical model is a pendulum-cart system. Two control force models were investigated by means of numerical simulations: (1) delayed state feedback (DSF); and (2) delay-compensating predictor feedback (PF). Both models require an internal model and are subject to certainty thresholds with delayed switching. Measured and simulated time histories were compared quantitatively using a cost function in terms of some essential SPs for all subjects. Minimization of the cost function showed that the control strategy of both OD and MD subjects can better be described by DSF. The control mechanism for the MD subjects was superior in two aspects: (1) they devoted less energy to controlling the cart’s position; and (2) their perception threshold for the stick’s angular velocity was found to be smaller. Findings support the concept that when sufficient sensory information is readily available, a delay-compensating PF strategy is not necessary. LA - English DB - MTMT ER - TY - JOUR AU - Sanz-Calle, M. AU - Munoa, J. AU - Iglesias, A. AU - López, de Lacalle L.N. AU - Dombóvári, Zoltán TI - Semianalytic stability algorithm in the frequency domain for interrupted milling JF - INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE J2 - INT J MACH TOOL MANU VL - 187 PY - 2023 SN - 0890-6955 DO - 10.1016/j.ijmachtools.2023.104005 UR - https://m2.mtmt.hu/api/publication/33734504 ID - 33734504 N1 - Dynamics & Control, IDEKO, Arriaga industrialdea 2, Elgoibar, 20870, Spain Mechanical Engineering Department, Faculty of Engineering of Bilbao, University of the Basque Country, 3 Rafael Moreno Ave., Bilbao, 48013, Spain MTA-BME Lendület Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3, Budapest, H1111, Hungary CODEN: IMTME Correspondence Address: Sanz-Calle, M.; Dynamics & Control, Arriaga industrialdea 2, Spain; email: msanz@ideko.es LA - English DB - MTMT ER - TY - JOUR AU - Shen, Minghao AU - He, Chaozhe R. AU - Molnár, Tamás Gábor AU - Bell, A. Harvey AU - Orosz, Gábor TI - Energy-Efficient Connected Cruise Control With Lean Penetration of Connected Vehicles JF - IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS J2 - IEEE T INTELL TRANSP VL - 24 PY - 2023 IS - 4 SP - 1 EP - 4320 PG - 13 SN - 1524-9050 DO - 10.1109/TITS.2022.3232105 UR - https://m2.mtmt.hu/api/publication/33546068 ID - 33546068 N1 - Funding Agency and Grant Number: Center for Connected and Automated Transportation, University of Michigan, through the U.S. Department of Transportation (DOT) [69A3551747105] Funding text: This work was supported by the Center for Connected and Automated Transportation, University of Michigan, through the U.S. Department of Transportation (DOT) under Grant 69A3551747105. The Associate Editor for this article was Y. Li. LA - English DB - MTMT ER - TY - JOUR AU - Szaksz, Bence Máté AU - Orosz, Gábor AU - Stépán, Gábor TI - Guided control of a human driver via an automated vehicle JF - IFAC PAPERSONLINE J2 - IFACOL VL - 56 PY - 2023 IS - 2 SP - 899 EP - 904 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2023.10.1679 UR - https://m2.mtmt.hu/api/publication/34211555 ID - 34211555 N1 - Part of Special Issue: 22nd IFAC World Congress, Yokohama, Japan, July 9-14, 2023 Edited by Hideaki Ishii, Yoshio Ebihara, Jun-ichi Imura, Masaki Yamakita Azbil Corporation; et al.; Fujita Corporation; Hitachi, Ltd.; Kumagai Gumi Co., Ltd.; The Society of Instrument and Control Engineers (SICE) Conference code: 195861 Export Date: 23 February 2024 Funding details: Magyar Tudományos Akadémia, MTA Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, NKFI-K-132477, NKFI-KKP-133846 Funding text 1: The research reported in this paper has been supported by the Hungarian National Research, Development and Innovation Office (NKFI-KKP-133846 and NKFI-K-132477). GO acknowledges the support of the MTA distinguished fellowship of the Hungarian Academy of Sciences. AB - The present work investigates the dynamics of a guided control situation when an automated vehicle is traveling in front of a human-driven vehicle, while the control of the automated vehicle contains the combination of a cruise control term and a backward looking term. The plant and string stability conditions of the underlying dynamical system are determined. The relevant time delays are taken into account and stability charts are presented for various delay combinations. A simple approximation of the string stable domain is proposed. Copyright © 2023 The Authors. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) LA - English DB - MTMT ER - TY - JOUR AU - Szaksz, Bence Máté AU - Stépán, Gábor TI - Delay Effects in the Dynamics of Human Controlled Towing of Vehicles JF - JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS J2 - J COMPUT NONLIN DYN VL - 18 PY - 2023 IS - 6 PG - 9 SN - 1555-1415 DO - 10.1115/1.4056590 UR - https://m2.mtmt.hu/api/publication/33555525 ID - 33555525 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI-KKP-133846, NKFI-K-132477] Funding text: Hungarian National Research, Development and Innovation Office (NKFI-KKP-133846 and NKFI-K-132477; FunderID: 10.13039/501100011019 AB - A simplified mechanical model of vehicle towing is constructed. The towing procedure is modeled by means of two blocks connected with a linear spring that represents the elastic drawbar. The driver in the towing car controls the velocity of towing, while the driver of the towed vehicle tries to maintain a constant tension in the drawbar. Both control forces are subjected to a constant time delay that represents the reaction time of the operators. Utilizing the translational symmetry of the system, Routh reduction is carried out to make the governing equations as compact as possible. Stability charts are constructed in the space of the control parameters and the fastest decay of signals is identified. As time delay increases, the stable domain disappears and reappears periodically. Guidelines are provided for the design of the elasticity of the drawbar, which takes into account the masses of the vehicles and the average reaction time of the drivers. LA - English DB - MTMT ER - TY - JOUR AU - Szekrényes, András TI - Stability of delaminated composite beams subjected to retarded periodic follower force JF - ARCHIVE OF APPLIED MECHANICS J2 - ARCH APPL MECH VL - 93 PY - 2023 IS - 11 SP - 4197 EP - 4216 PG - 20 SN - 0939-1533 DO - 10.1007/s00419-023-02489-y UR - https://m2.mtmt.hu/api/publication/34168018 ID - 34168018 N1 - Correspondence Address: Szekrényes, A.; Department of Applied Mechanics, Muegyetem rkp. 3, Hungary; email: szeki@mm.bme.hu Funding Agency and Grant Number: National Research, Development and Innovation (NRDI) [128090, 134303]; National Research, Development and Innovation Fund [TUDFO/51757/ 2019-ITM] Funding text: This work has been supported by the National Research, Development and Innovation (NRDI) under grant No.128090 and 134303. The research reported in this paper has been supported by the National Research, Development and Innovation Fund (TUDFO/51757/ 2019-ITM, Thematic Excellence Program). AB - This work deals with the stability problem of elastic composite cantilever beams subjected to a delayed, periodically changing follower force. The equation of motion of the periodic system with time delay is deduced based on some previous works. Composite beams with and without delamination are considered, and the finite element method is applied to carry out the spatial discretization of the structures. Besides, for the delaminated case further two cases are involved. The first case is when the delamination is in the midplane of the beam, while the second case involves an asymmetrically placed delamination, respectively. The Floquet theory is applied to derive the transition matrix of the periodic system. An important aspect is that the time delay and the principal period of the dynamic force are equal to each other. The discretization over the time domain is performed by using the Chebyshev polynomials of the first kind. Basically, there are five parameters governing the dynamic problem including among others the time delay and the static and dynamic forces. The stability behavior is shown for the intact and delaminated beams on the parameter planes for large number of cases by using the unit circle criteria. The presence and absence of structural damping is also analyzed in each case. The results indicate that some planes are sensitive to the mesh resolution, others are not. Moreover, on some planes significant differences may take place between the intact and delaminated beams from the standpoint of stable zones. LA - English DB - MTMT ER - TY - JOUR AU - Szekrényes, András TI - Fracture mechanical stability of DCB and 4ENF tests complemented with linear springs JF - THEORETICAL AND APPLIED FRACTURE MECHANICS J2 - THEOR APPL FRACT MEC VL - 125 PY - 2023 PG - 11 SN - 0167-8442 DO - 10.1016/j.tafmec.2023.103900 UR - https://m2.mtmt.hu/api/publication/33753409 ID - 33753409 N1 - Export Date: 5 May 2023 LA - English DB - MTMT ER - TY - JOUR AU - Takács, Donát M. AU - Berezvai, Szabolcs AU - Kovács, László TI - A general method for numerical identifiability and sensitivity analysis of failure criteria for continuous fibre-reinforced plastics JF - EUROPEAN JOURNAL OF MECHANICS A-SOLIDS J2 - EUR J MECH A-SOLID VL - 100 PY - 2023 PG - 15 SN - 0997-7538 DO - 10.1016/j.euromechsol.2023.104976 UR - https://m2.mtmt.hu/api/publication/33701249 ID - 33701249 LA - English DB - MTMT ER - TY - JOUR AU - Tóth, Rudolf AU - Stépán, Gábor TI - ROBOT ASSISTED STABILIZATION FOR FLEXIBLE WORKPIECES SUBJECTED TO HIGHLY INTERRUPTED CUTTING JF - MM Science Journal J2 - MM Science Journal VL - 2023-November PY - 2023 SP - 6938 EP - 6944 PG - 7 SN - 1803-1269 DO - 10.17973/MMSJ.2023_11_2023114 UR - https://m2.mtmt.hu/api/publication/34406974 ID - 34406974 N1 - Export Date: 30 November 2023 Correspondence Address: Toth, R.R.; Budapest University of Technology and Economics, Hungary; email: rudolf.toth@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Tóth, Rudolf AU - Stépán, Gábor TI - Bifurcation scenarios in the hardware-in-the-loop experiments of highly interrupted milling processes JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 22177 EP - 22184 PG - 8 SN - 0924-090X DO - 10.1007/s11071-023-08591-8 UR - https://m2.mtmt.hu/api/publication/33989207 ID - 33989207 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI-KKP-133846, NKFI-K-132477] Funding text: AcknowledgementsThe research reported in this paper has been supported by the Hungarian National Research, Development and Innovation Office (NKFI-KKP-133846, NKFI-K-132477). AB - Hardware-in-the-loop (HIL) measurements of highly interrupted milling processes were conducted. A real spindle was used with a dummy tool on which the cutting forces were emulated with contactless sensors and actuators. During the experiments, Hopf- and period-doubling bifurcations were identified. The nonlinear dynamics of these period-doubling bifurcations are analyzed for a discrete model of highly interrupted milling. This investigation found the bifurcation to be subcritical, which draws the attention to the limited practical validity of linear stability analysis. LA - English DB - MTMT ER - TY - JOUR AU - Vörös, Illés AU - Orosz, Gábor AU - Takács, Dénes TI - On the global dynamics of path-following control of automated passenger vehicles JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 111 PY - 2023 SP - 8235 EP - 8252 PG - 18 SN - 0924-090X DO - 10.1007/s11071-023-08284-2 UR - https://m2.mtmt.hu/api/publication/33672832 ID - 33672832 N1 - ELKH-BME Research Group on Dynamics of Machines, Budapest, 1111, Hungary Department of Mechanical Engineering, Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States Correspondence Address: Vörös, I.; ELKH-BME Research Group on Dynamics of MachinesHungary; email: illes.voros@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Wang, Hao AU - Avedisov, Sergei AU - Molnár, Tamás Gábor AU - Sakr, Ahmed Hamdi AU - Altintas, Onur AU - Orosz, Gabor TI - Conflict Analysis for Cooperative Maneuvering with Status and Intent Sharing via V2X Communication JF - IEEE Transactions on Intelligent Vehicles J2 - IEEE Transactions on Intelligent Vehicles VL - 8 PY - 2023 IS - 2 SP - 1105 EP - 1118 PG - 14 SN - 2379-8858 DO - 10.1109/TIV.2022.3149796 UR - https://m2.mtmt.hu/api/publication/33545065 ID - 33545065 LA - English DB - MTMT ER - TY - JOUR AU - Zhao, Chenguang AU - Yu, Huan AU - Molnár, Tamás Gábor TI - Safety-critical traffic control by connected automated vehicles JF - TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES J2 - TRANSPORT RES C-EMER VL - 154 PY - 2023 SN - 0968-090X DO - 10.1016/j.trc.2023.104230 UR - https://m2.mtmt.hu/api/publication/34052516 ID - 34052516 LA - English DB - MTMT ER - TY - JOUR AU - Antali, Máté AU - Stépán, Gábor TI - Slipping–rolling transitions of a body with two contact points JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 107 PY - 2022 SP - 1511 EP - 1528 PG - 18 SN - 0924-090X DO - 10.1007/s11071-021-06538-5 UR - https://m2.mtmt.hu/api/publication/32189362 ID - 32189362 LA - English DB - MTMT ER - TY - JOUR AU - Astarloa, A. AU - Semm, T. AU - Mancisidor, I. AU - Fernandes, M.H. AU - Ellinger, J. AU - Dombóvári, Zoltán AU - Munoa, J. (1) TI - Damping in ram based vertical lathes and portal machines JF - CIRP ANNALS-MANUFACTURING TECHNOLOGY J2 - CIRP ANN-MANUF TECHN VL - 71 PY - 2022 IS - 1 SP - 369 EP - 372 PG - 4 SN - 0007-8506 DO - 10.1016/j.cirp.2022.04.039 UR - https://m2.mtmt.hu/api/publication/32866849 ID - 32866849 N1 - Dynamics and Control, Ideko, Basque Country, Elgoibar, Spain Institute for Machine Tools and Industrial Management (iwb), Technical University of Munich (TUM), Garching, Germany Mechanical Engineering Department, University of Basque Country (UPV-EHU), Basque Country, Bilbao, Spain MTA-BME Machine Tool Vibration Research Group, Dept. of Applied Mechanics, Budapest University of Technology and Economics, Budapest, Hungary Correspondence Address: Munoa, J.; Dynamics and Control, Basque Country, Spain; email: jokin_munoa001@ehu.eus LA - English DB - MTMT ER - TY - JOUR AU - Astarloa, A. AU - Comak, A. AU - Mancisidor, I. AU - Fernandes, M.H. AU - Munoa, J. AU - Dombóvári, Zoltán TI - Improvement of boring operations by means of mode coupling effect JF - CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY J2 - CIRP J MANUF SCI TECHNOL VL - 37 PY - 2022 SP - 633 EP - 644 PG - 12 SN - 1755-5817 DO - 10.1016/j.cirpj.2022.03.008 UR - https://m2.mtmt.hu/api/publication/32805795 ID - 32805795 N1 - Ideko – Member of BRTA, Dynamics & Control, Basque Country, Elgoibar, Spain Department of Mechanical Engineering, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada Currently with MTU Aero Engines AG, 665 Dachauer Str, Munich, 80995, Germany Mechanical Engineering Department, University of Basque Country (UPV-EHU), Basque Country, Bilbao, Spain Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology and Economics (BME), Budapest, Hungary Correspondence Address: Astarloa, A.; Ideko – Member of BRTA, Basque Country, Spain; email: aastarloa006@ikasle.ehu.eus LA - English DB - MTMT ER - TY - JOUR AU - Balogh, Tamás AU - Insperger, Tamás TI - Semi-Discretization for Fractional-Order Feedback Systems with Input Delay JF - IFAC PAPERSONLINE J2 - IFACOL VL - 55 PY - 2022 IS - 36 SP - 198 EP - 203 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2022.11.357 UR - https://m2.mtmt.hu/api/publication/33546112 ID - 33546112 LA - English DB - MTMT ER - TY - JOUR AU - Balogh, Tamás AU - Várszegi, Balázs AU - Insperger, Tamás TI - On the admissible control-loop delay for the inverted pendulum subject to detuned PDA feedback JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 529 PY - 2022 PG - 11 SN - 0022-460X DO - 10.1016/j.jsv.2022.116898 UR - https://m2.mtmt.hu/api/publication/32843692 ID - 32843692 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund of the Ministry for Innovation and Technology [BME-NVA-02]; Hungarian National Research, Development and Innovation Office [NKFI-K138621] Funding text: The research reported in this paper has been supported by the National Research, Development and Innovation Fund (TKP2020 NC, Grant No. BME-NCS and TKP2021, Project no. BME-NVA-02) under the auspices of the Ministry for Innovation and Technology and by the Hungarian National Research, Development and Innovation Office (Grant no. NKFI-K138621). AB - In this paper, we consider the stabilization of & nbsp;phi(t)-a(0)phi(t)=-k(p)phi(t-tau-delta(p))-k(d)phi(t-tau-delta(d))-k(a)phi(t-tau-delta(a)),& nbsp;which describes the control of an & nbsp;inverted pendulum & nbsp;by detuned proportional-derivative-acceleration (PDA) feedback. We show that the system can be stabilized using an appropriate choice of the control parameters & nbsp;k(p),& nbsp;k(d),& nbsp;k(a)& nbsp;and & nbsp;delta(p),& nbsp;delta(d),& nbsp;delta(a)& nbsp;>= 0 & nbsp;if & nbsp;tau & nbsp;is smaller than the critical delay & nbsp;tau(crit)=root 6/a(0). This value is larger by a factor of & nbsp;root 3 asymptotic to 1.73 & nbsp;than the critical delay of the proportional-derivative (PD) feedback with a single delay. LA - English DB - MTMT ER - TY - JOUR AU - Balogh, Tamás AU - Boussaada, Islam AU - Insperger, Tamás AU - Niculescu, Silviu-Iulian TI - Conditions for stabilizability of time-delay systems with real-rooted plant JF - INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL J2 - INT J ROBUST NONLIN VL - 32 PY - 2022 IS - 6 SP - 3206 EP - 3224 PG - 19 SN - 1049-8923 DO - 10.1002/rnc.5698 UR - https://m2.mtmt.hu/api/publication/32386744 ID - 32386744 N1 - Funding Agency and Grant Number: French National Research Agency (ANR)French National Research Agency (ANR); Hubert Curien (PHC) BALATON [40502NM]; Hungarian- Chinese Bilateral Scientific and Technological Cooperation [2018-2.1.14-TET- CN-2018-00008]; IDEX Paris-Saclay; Nemzeti Kutatasi Fejlesztesi es Innovacios HivatalNational Research, Development & Innovation Office (NRDIO) - Hungary Funding text: French National Research Agency (ANR), Grant/Award Number: Investissement d'Avenir; Hubert Curien (PHC) BALATON, Grant/Award Number: 40502NM; Hungarian- Chinese Bilateral Scientific and Technological Cooperation, Grant/Award Number: 2018-2.1.14-TET- CN-2018-00008; IDEX Paris-Saclay, Grant/Award Number: iCODE Institute project; Nemzeti Kutatasi Fejlesztesi es Innovacios Hivatal, Grant/Award Numbers: BME-IE-BIO, BME-NC AB - In this article we consider the gamma-stabilization of nth-order linear time-invariant dynamical systems using multiplicity-induced-dominancy-based controller design in the presence of delays in the input or the output channels. A sufficient condition is given for the dominancy of a real root with multiplicity at least n+1 and at least n using an integral factorization of the corresponding characteristic function. A necessary condition for gamma-stabilizability is analyzed utilizing the property that the derivative of a gamma-stable quasipolynomial is also gamma-stable under certain conditions. Sufficient and necessary conditions are given for systems with real-rooted open-loop characteristic function: the delay intervals are determined where the conditions for dominancy and gamma-stabilizability are satisfied. The efficiency of the proposed controller design is shown in the case of a multilink inverted pendulum. LA - English DB - MTMT ER - TY - JOUR AU - Bártfai, András AU - Dombóvári, Zoltán TI - Hopf bifurcation calculation in neutral delay differential equations: Nonlinear robotic arms subject to delayed acceleration feedback control JF - INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS J2 - INT J NONLINEAR MECH VL - 147 PY - 2022 PG - 15 SN - 0020-7462 DO - 10.1016/j.ijnonlinmec.2022.104239 UR - https://m2.mtmt.hu/api/publication/33133852 ID - 33133852 N1 - Export Date: 8 November 2022 CODEN: IJNMA Correspondence Address: Bartfai, A.; MTA-BME Lendület Machine Tool Vibration Research Group, Hungary; email: andras.bartfai@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Benarab, Amina AU - Molnár, Csenge Andrea AU - Boussaada, Islam AU - Trabelsi, Karim AU - Insperger, Tamás AU - Niculescu, Silviu-Iulian TI - Rolling Balance Board Robust Stabilization: A MID-based Design JF - IFAC PAPERSONLINE J2 - IFACOL VL - 55 PY - 2022 IS - 36 SP - 7 EP - 12 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2022.11.325 UR - https://m2.mtmt.hu/api/publication/33565453 ID - 33565453 LA - English DB - MTMT ER - TY - JOUR AU - Davidson, Joshua Patrick AU - Kalmár-Nagy, Tamás AU - Habib, Giuseppe TI - Parametric excitation suppression in a floating cylinder via dynamic vibration absorbers: a comparative analysis JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 110 PY - 2022 SP - 1081 EP - 1108 PG - 28 SN - 0924-090X DO - 10.1007/s11071-022-07710-1 UR - https://m2.mtmt.hu/api/publication/33039229 ID - 33039229 N1 - Department of Fluid Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary Department of Applied Mechanics, Faculty of Mechanical Engineering, MTA-BME Lendület “Momentum” Global Dynamics Research Group Budapest University of Technology and Economics, Budapest, Hungary Correspondence Address: Davidson, J.; Department of Fluid Mechanics, Hungary; email: davidson@ara.bme.hu AB - Parametric excitation in the pitch/roll degrees of freedom (DoFs) can induce dynamic instability in floating cylinder-type structures such as spar buoys, floating offshore wind or wave energy converters. At certain frequency and amplitude ranges of the input waves, parametric coupling between the heave and pitch/roll DoFs results in undesirable large amplitude rotational motion. One possible remedy to mitigate the existence of parametric resonance is the use of dynamic vibration absorbers. Two prominent types of dynamic vibration absorbers are tuned mass dampers (TMDs) and nonlinear energy sinks (NESs), which have contrasting properties with regard to their amplitude and frequency dependencies when absorbing kinetic energy from oscillating bodies. This paper investigates the suppression of parametric resonance in floating bodies utilizing dynamic vibration absorbers, comparing the performance of TMDs against NESs for a test case considering a floating vertical cylinder. In addition to the type of dynamic vibration absorber utilized, the paper also examines the DoF which it acts on, comparing the benefits between attaching the vibration absorber to the primary (heave) DoF or the secondary (pitch) DoF. The results show that the TMD outperforms the NES and that it is more effective to attach the vibration absorber to the heave DoF when eliminating parametric resonance in the pitch DoF. LA - English DB - MTMT ER - TY - JOUR AU - Dekemele, Kevin AU - Habib, Giuseppe AU - Loccufier, Mia TI - The periodically extended stiffness nonlinear energy sink JF - MECHANICAL SYSTEMS AND SIGNAL PROCESSING J2 - MECH SYST SIGNAL PR VL - 169 PY - 2022 PG - 19 SN - 0888-3270 DO - 10.1016/j.ymssp.2021.108706 UR - https://m2.mtmt.hu/api/publication/32589942 ID - 32589942 N1 - Ghent University, Department of Electromechanical, Systems and Metal Engineering, Tech Lane Ghent Science Park - Campus A 125, Ghent, 9052, Belgium Budapest University of Technology and Economics, Department of Applied Mechanics, MTA-BME Lendület Machine Tool Vibration Research Group, Műegyetem rkp. 5., Budapest, H-1111, Hungary Cited By :1 Export Date: 29 April 2022 CODEN: MSSPE Correspondence Address: Dekemele, K.; Ghent University, Tech Lane Ghent Science Park - Campus A 125, Belgium; email: kevin.dekemele@ugent.be AB - Conventional nonlinear energy sinks (NES) are considered to be a more robust alternative to linear vibration absorbers such as the tuned-mass–damper (TMD). While the conventional NES has a larger efficient frequency bandwidth than the TMD, it is only really efficient for a small energy range. This implies a deterioration of the NES’s mitigation properties if the primary system’s amplitude varies. To overcome this issue, other researchers resort to increasing the complexity of the NES by adding degrees-of-freedom. Here, another line of thought is presented, by proposing an unconventional stiffness characteristic. To increase the energy bandwidth the NES in this paper features a non-smooth, periodically extended stiffness characteristic. This NES is attached to an uncertain primary system and its performance is compared with that of the conventional NES and of the TMD by deriving the slow invariant manifolds (SIMs) in transient 1:1 resonance. The SIMs are curves that relate the vibration amplitudes of the primary system and the NES, and serve as an easy and computationally efficient tool to analyze performance. The research in this paper will prove that the newly proposed NES can be both robust regarding energy and frequency uncertainty, by considering the novel periodically extended stiffness characteristic. LA - English DB - MTMT ER - TY - JOUR AU - Franco, O. AU - Beudaert, X. AU - Iglesias, A. AU - Dombóvári, Zoltán AU - Erkorkmaz, K. AU - Munoa, J. TI - Optimal cutting condition selection for high quality receptance measurements by sweep milling force excitation JF - INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE J2 - INT J MACH TOOL MANU VL - 176 PY - 2022 PG - 15 SN - 0890-6955 DO - 10.1016/j.ijmachtools.2022.103873 UR - https://m2.mtmt.hu/api/publication/32860652 ID - 32860652 N1 - Precision Controls Laboratory (PCL), University of Waterloo, Waterloo, ON, Canada IDEKO, Dynamics & Control Department, Basque Country, Elgoibar, Spain MTA-BME Lendulet Machine Tool Vibration Research Group, Department of Applied Mechanics, Budapest University of Technology andEconomics, Budapest, H-1521, Hungary University of the Basque Country, Department of Mechanical Engineering, Bilbao, Spain Export Date: 3 June 2022 CODEN: IMTME Correspondence Address: Franco, O.; Precision Controls Laboratory (PCL), Canada; email: ofranco@ideko.es AB - In large machine tool applications, where machine's productivity is limited by structural chatter vibrations, an accurate dynamic characterization is vital for predicting reliable stability lobes. Motivated by the fact that the sweep milling force excitation method shows a great potential, this paper conducts a numerical stability analysis for optimizing the tool radial engagement employed during the characterization cutting tests. Additionally, an alternative spectra computation technique is proposed which considerably improves the signal to noise ratio over the existing technique. The receptance measurement is demonstrated using time domain simulations and applied in a large-scale three axis machining centre obtaining more accurate stability boundary predictions. The source code of the temporal milling simulation and the sweep milling signal processing is freely available to reproduce the simulation and experimental results. LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe AU - Fainshtein, Emanuel AU - Wolf, Kai-Dietrich AU - Gottlieb, Oded TI - The influence of nonlinear damping on the response of a piezoelectric cantilever sensor in a symmetric or asymmetric configuration JF - SMART STRUCTURES AND SYSTEMS J2 - SMART STRUCT SYST VL - 30 PY - 2022 IS - 3 SP - 239 EP - 243 PG - 5 SN - 1738-1584 DO - 10.12989/sss.2022.30.3.239 UR - https://m2.mtmt.hu/api/publication/33286428 ID - 33286428 N1 - Funding Agency and Grant Number: Israel Science Foundation [136/16]; Henri Garih Chair in Mechanical Engineering Funding text: Acknowledgments The research described in this paper was supported in part by the Israel Science Foundation (Grant no. 136/16) . O.G. was partially supported by the Henri Garih Chair in Mechanical Engineering. E.F. and K.W. acknowledge the support of their Technion graduate studies and postdoctoral fellowships, respectively. AB - We investigate the influence of nonlinear viscoelastic damping on the response of a cantilever sensor covered by piezoelectric layers in a symmetric or asymmetric configuration. We formulate an initial-boundary-value problem which consistently incorporates both geometric and material nonlinearities including the effect of viscoelastic damping which cannot be ignored for micro-and nano-mechanical sensor operation in a vacuum environment. We employ an asymptotic multiple -scales methodology to yield the system nonlinear frequency response near its primary resonance and employ a model-based estimation procedure to deduce the system damping backone curve from controlled experiments in vacuum. We discuss the effect of nonlinear damping on sensor applications for scanning probe microscopy. LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe AU - Giorgi, Giuseppe AU - Davidson, Joshua Patrick TI - Coexisting attractors in floating body dynamics undergoing parametric resonance JF - ACTA MECHANICA J2 - ACTA MECH VL - 233 PY - 2022 SP - 2351 EP - 2367 PG - 17 SN - 0001-5970 DO - 10.1007/s00707-022-03225-3 UR - https://m2.mtmt.hu/api/publication/32845151 ID - 32845151 N1 - Export Date: 7 June 2022 CODEN: AMHCA Correspondence Address: Habib, G.; Department of Applied Mechanics, Hungary; email: habib@mm.bme.hu AB - This study pertains to analysing the dynamical behaviour of a floating body undergoing parametric resonances. A simple vertical cylinder, representing a classical spar-buoy, is considered, limiting its motion to heave and pitch degrees of freedom. Its geometry and mass distribution are chosen such that a 2:1 ratio of heave to pitch/roll natural frequency makes the spar-buoy prone to parametric resonance. The system is then studied by the shooting method, combined with a pseudo-arclength continuation, and the harmonic balance procedure. Results show that an extensive bistable region exists, where stable parametric resonance coexists with a regular resonance response. The analysis also unveiled the existence of stable quasiperiodic motions existing in correspondence of both pitch and heave resonance. Results are qualitatively validated using a model based on the explicit nonlinear Froude–Krylov force calculation. LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe AU - Bártfai, András AU - Barrios, Asier AU - Dombóvári, Zoltán TI - Bistability and delayed acceleration feedback control analytical study of collocated and non-collocated cases JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 108 PY - 2022 IS - 3 SP - 2075 EP - 2096 PG - 22 SN - 0924-090X DO - 10.1007/s11071-022-07308-7 UR - https://m2.mtmt.hu/api/publication/32730306 ID - 32730306 N1 - Funding Agency and Grant Number: Budapest University of Technology and Economics; Posicionamiento estrategico en modelos virtuales y gemelos digitales para una industria 4.0 [CER-20191001]; InterQ European project [H2020-958357]; Hungarian National Science Foundation [OTKA 134496]; National Research, Development and Innovation Fund (TKP2020 NC) under the Ministry for Innovation and Technology [BME-NCS, TKP2021, BME-NVA-02] Funding text: Open access funding provided by Budapest University of Technology and Economics. This research work was done under the framework of the project MIRAGED: Posicionamiento estrategico en modelos virtuales y gemelos digitales para una industria 4.0 (CER-20191001). This research was supported by the InterQ European project (H2020-958357). GHacknowledges the financial support of the Hungarian National Science Foundation under grant number OTKA 134496. The research reported in this paper was supported by the National Research, Development and Innovation Fund (TKP2020 NC, Grant No. BME-NCS and TKP2021, Project no. BME-NVA-02) under the auspices of the Ministry for Innovation and Technology. AB - Stability and bifurcation analysis of a non-rigid robotic arm controlled with a time-delayed acceleration feedback loop is addressed in this work. The study aims at revealing the dynamical mechanisms leading to the appearance of limit cycle oscillations existing in the stable region of the trivial solution of the system, which is related to the combined dynamics of the robot control and its structural nonlinearities. An analytical study of the bifurcations occurring at the loss of stability illustrates that, in general, hardening structural nonlinearities at the joint promote a subcritical character of the bifurcations. Consequently, limit cycle oscillations are generated within the stable region of the trivial solution. A nonlinear control force is then developed to enforce the supercriticality of the bifurcations. Results illustrate that this strategy enables to partially eliminate limit cycle oscillations coexisting with the stable trivial solution. The mechanical system is analysed in a collocated and a non-collocated configuration, depending on the position of the sensor. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Ádám AU - Béda, Péter AU - Takács, Dénes TI - Modelling and stability analysis of a longitudinal wheel dynamics control loop with feedback delay JF - VEHICLE SYSTEM DYNAMICS J2 - VEHICLE SYST DYN VL - 60 PY - 2022 IS - 11 SP - 3765 EP - 3787 PG - 23 SN - 0042-3114 DO - 10.1080/00423114.2021.1975775 UR - https://m2.mtmt.hu/api/publication/32210431 ID - 32210431 N1 - Budapest University of Technology and Economics, Budapest, Hungary MTA-BME Research Group on Dynamics of Machines and Vehicles, Budapest, Hungary Correspondence Address: Horvath, A.; Budapest University of Technology and EconomicsHungary; email: horvath.adam@edu.bme.hu AB - Vehicle safety is an important field of today's engineering practice and the scientific research as well. One of the basics of the modern vehicle system dynamics control systems is braking or driving torque control. Ensuring proper connection between the tyre and the road surface is essential for safety and good handling behaviour. Fundamental questions may arise about the details of the model, such as feedback delay, sampling effect, numerical differentiation in the control algorithm or the dynamical characteristics of the tyre model. In this article, a connected dynamical system is presented which contains a wheel model and a PID type traction controller. Steady state and dynamical brush type tyre models are presented and compared. Two different ways are described to model the feedback delay. The fully continuous time model contains constant time delay, while there is another case, where the sampling effect and the numerical differentiation methods of the control algorithm are presented. Finally, stability analysis of the delayed system is performed. The stability and performance characteristics and different bifurcations are presented using stability charts. The type of the tyre model has significant effect on the stability characteristics. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Hanna Zsófia AU - Takács, Dénes TI - Stability and local bifurcation analyses of two-wheeled trailers considering the nonlinear coupling between lateral and vertical motions JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 107 PY - 2022 SP - 2115 EP - 2132 PG - 18 SN - 0924-090X DO - 10.1007/s11071-021-07120-9 UR - https://m2.mtmt.hu/api/publication/32572363 ID - 32572363 N1 - Export Date: 29 April 2022 CODEN: NODYE Correspondence Address: Horvath, H.Z.; Department of Applied Mechanics, Hungary; email: hanna.horvath@mm.bme.hu AB - The nonlinear dynamics of two-wheeled trailers is investigated using a spatial 4-DoF mechanical model. The non-smooth characteristics of the tire forces caused by the detachment of the tires from the ground and other geometrical nonlinearities are taken into account. Beyond the linear stability analysis, the nonlinear vibrations are analyzed with special attention to the nonlinear coupling between the vertical and lateral motions of the trailer. The center manifold reduction is performed leading to a normal form up to third degree terms. The nature of the emerging periodic solutions, and, thus, the sense of the Hopf bifurcations are verified semi-analytically and numerically. Simplified models of the trailer are also used in order to point out the practical relevance of the study. It is shown that the linearly independent pitch motion affects the sense of the Hopf bifurcations at the linear stability boundary. Namely, the constructed spatial trailer model provides subcritical bifurcations for higher center of gravity positions, while the commonly used simplified mechanical models explore the less dangerous supercritical bifurcations only. Domains of loss of contact of tires are also detected and shown in the stability charts highlighting the presence of unsafe zones. Experiments are carried out on a small-scale trailer to validate the theoretical results. A good agreement can be observed between the measured and numerically determined critical speeds and vibration amplitudes. LA - English DB - MTMT ER - TY - JOUR AU - Iklódi, Zsolt AU - Barton, David A.W. AU - Dombóvári, Zoltán TI - Bi-stability induced by motion limiting constraints on boring bar tuned mass dampers JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 517 PY - 2022 PG - 11 SN - 0022-460X DO - 10.1016/j.jsv.2021.116538 UR - https://m2.mtmt.hu/api/publication/32477677 ID - 32477677 LA - English DB - MTMT ER - TY - JOUR AU - Kádár, Fanni AU - Hős, Csaba János AU - Stépán, Gábor TI - Delayed oscillator model of pressure relief valves with outlet piping JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 534 PY - 2022 PG - 15 SN - 0022-460X DO - 10.1016/j.jsv.2022.117016 UR - https://m2.mtmt.hu/api/publication/32887357 ID - 32887357 N1 - Funding Agency and Grant Number: Hungarian National Science Foundation [No.NKFI K 132477, NKFI KKP 133846] Funding text: The research reported in this paper has been supported by the Hungarian National Science Foundation under Grant No.NKFI K 132477 and NKFI KKP 133846. AB - The system of a vessel and a direct spring operated pressure relief valve is extended by a downstream pipe. The presented mathematical model consisting of ordinary and partial differential equations can be transformed to a system of differential difference equations by means of the travelling wave solutions of the partial differential equations. This model contains a time delay originated in the pipe length and the speed of sound in the pipe. The linear stability analysis presents stability charts in a parameter plane characterising the environment where the valve is built in. The boundary lines and the corresponding vibration frequencies of the self-excited vibrations are determined as compact closed form expressions. Several analogies are identified with other physical systems modelled by delayed oscillators. Both the stability charts and the vibration frequencies are checked with numerical simulations of the original nonlinear system consisting of coupled ordinary and partial differential equations. The connection between the travelling wave solution and the standard quarter standing wave approximation is explained. A qualitatively relevant phenomenon is identified, namely the appearance of the quasi-periodic vibration at certain parameter combinations. LA - English DB - MTMT ER - TY - JOUR AU - Károly, Dóra AU - Iklódi, Zsolt AU - Kemény, Alexandra AU - Kincses, Domonkos AU - Orbulov, Imre Norbert TI - Production and Functional Properties of Graded Al-Based Syntactic Metal Foams JF - METALS J2 - METALS-BASEL VL - 12 PY - 2022 IS - 2 PG - 12 SN - 2075-4701 DO - 10.3390/met12020263 UR - https://m2.mtmt.hu/api/publication/32635809 ID - 32635809 N1 - Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Composite Metal Foams Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Machine Tool Vibration Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Export Date: 2 May 2022 Correspondence Address: Orbulov, I.N.; Department of Materials Science and Engineering, Műegyetem rkp. 3., Hungary; email: orbulov@eik.bme.hu AB - As cellular materials are gaining more ground in the automotive, airplane, and railway industries, the demand for functionally graded metal foams has appeared. In the case of syntactic metal foams, by changing the distribution of the filler material, the properties of the foams can be precisely adjusted according to the desired area of application. Several kinds of graded aluminum matrix syntactic foams (GMSFs) were fabricated with lightweight expanded clay aggregate particles and ceramic hollow spheres as filler materials. Their mechanical properties were observed by modal analysis and compression tests, supplemented with an accurate density determination by computer tomography measurements. The compressive properties were set up on a large scale by adjusting the density by adding specific amounts of Al particles to the filler. Based on the modal analysis results, simple averaging the density of GMSFs produces an inaccurate result in mode shapes and material parameters, so the varying density distributions should be taken into account. By simply varying the distribution of the filler material, we can modify the effective material properties of metal foams to better fit industrial requirements. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, Ádám AU - Bachrathy, Dániel TI - Bifurcations analysis in implicit maps through the dynamics of cumulated surface errors in milling JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 109 PY - 2022 SP - 779 EP - 792 PG - 14 SN - 0924-090X DO - 10.1007/s11071-022-07486-4 UR - https://m2.mtmt.hu/api/publication/32809396 ID - 32809396 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund (TKP2020 NC) under Ministry for Innovation and Technology [BME-NCS]; National Research, Development and Innovation Fund (TKP2021) under Ministry for Innovation and Technology [BME-NVA-02]; Hungarian National Research, Development and Innovation Office [NKFI FK-124462, FK-138500] Funding text: The research reported in this paper has been supported by the National Research, Development and Innovation Fund (TKP2020 NC, Grant No. BME-NCS and TKP2021, Project no. BME-NVA-02) under the auspices of the Ministry for Innovation and Technology and by the Hungarian National Research, Development and Innovation Office (Grant no. NKFI FK-124462 and FK-138500). LA - English DB - MTMT ER - TY - JOUR AU - Kiss, Ádám AU - Hajdu, Dávid AU - Bachrathy, Dániel AU - Stépán, Gábor AU - Dombóvári, Zoltán TI - In-process impulse response of milling to identify stability properties by signal processing JF - JOURNAL OF SOUND AND VIBRATION J2 - J SOUND VIB VL - 527 PY - 2022 PG - 16 SN - 0022-460X DO - 10.1016/j.jsv.2022.116849 UR - https://m2.mtmt.hu/api/publication/32705211 ID - 32705211 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office [NKFI FK-124462, NKFI PD-137673, NEMZ:2019-2.1.2-NEMZ-2019-00005]; National Research, Development and Innovation Fund, Hungary under the Ministry for Innovation and Technology [BME-NVA-02, BME-NCS] Funding text: The research reported in this paper has been supported by the National Research, Development and Innovation Fund, Hungary (TKP2020 NC, Grant No. BME-NCS and TKP2021, Project no. BME-NVA-02) under the auspices of the Ministry for Innovation and Technology and by the Hungarian National Research, Development and Innovation Office (Grant no. NKFI FK-124462, NKFI PD-137673 and NEMZ:2019-2.1.2-NEMZ-2019-00005). LA - English DB - MTMT ER - TY - JOUR AU - Kossa, Attila AU - Berezvai, Szabolcs AU - Stépán, Gábor TI - Mechanical characterization of high-speed rubber ball impacts applied for impulse excitation JF - MATERIALS TODAY: PROCEEDINGS J2 - MATER TOD PROC VL - 62 PY - 2022 IS - 5 SP - 2560 EP - 2565 PG - 6 SN - 2214-7853 DO - 10.1016/j.matpr.2022.03.460 UR - https://m2.mtmt.hu/api/publication/32799405 ID - 32799405 N1 - Correspondence Address: Berezvai, S.; Budapest University of Technology and Economics, Műegyetem rkp. 5, Hungary; email: berezvai@mm.bme.hu LA - English DB - MTMT ER - TY - JOUR AU - Kovács, Balázs András AU - Insperger, Tamás TI - Virtual stick balancing: skill development in Newtonian and Aristotelian dynamics JF - JOURNAL OF THE ROYAL SOCIETY INTERFACE J2 - J R SOC INTERFACE VL - 19 PY - 2022 IS - 188 PG - 11 SN - 1742-5689 DO - 10.1098/rsif.2021.0854 UR - https://m2.mtmt.hu/api/publication/32754724 ID - 32754724 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund (TKP2020 NC) under the Ministry for Innovation and Technology [BME-NCS]; Hungarian National Research, Development and Innovation OfficeNational Research, Development & Innovation Office (NRDIO) - Hungary [NKFI-K138621]; National Research, Development and Innovation Fund (TKP2021) [BME-NVA-02] Funding text: The research reported in this paper has been supported by the National Research, Development and Innovation Fund (TKP2020 NC, grant no. BME-NCS and TKP2021, project no. BME-NVA-02) under the auspices of the Ministry for Innovation and Technology and by the Hungarian National Research, Development and Innovation Office (grant no. NKFI-K138621). AB - Human reaction delay significantly limits manual control of unstable systems. It is more difficult to balance a short stick on a fingertip than a long one, because a shorter stick falls faster and therefore requires faster reactions. In this study, a virtual stick balancing environment was developed where the reaction delay can be artificially modulated and the law of motion can be changed between second-order (Newtonian) and first-order (Aristotelian) dynamics. Twenty-four subjects were separated into two groups and asked to perform virtual stick balancing programmed according to eitherNewtonian or Aristotelian dynamics. The shortest stick length (critical length, Lc) was determined for different added delays in six sessions of balancing trials performed on different days. The observed relation between Lc and the overall reaction delay reflected the feature of the underlying mathematical models: (i) for the Newtonian dynamics Lc is proportional to 2; (ii) for the Aristotelian dynamics Lc is proportional to . Deviation of the measured Lc( ) function from the theoretical one was larger for the Newtonian dynamics for all sessions, which suggests that, at least in virtually controlled tasks, it is more difficult to adopt second-order dynamics than first-order dynamics. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, Balázs András AU - Insperger, Tamás TI - Critical parameters for the robust stabilization of the inverted pendulum with reaction delay: State feedback versus predictor feedback JF - INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL J2 - INT J ROBUST NONLIN VL - 32 PY - 2022 IS - 18 SP - 9710 EP - 9722 PG - 13 SN - 1049-8923 DO - 10.1002/rnc.5649 UR - https://m2.mtmt.hu/api/publication/32252118 ID - 32252118 LA - English DB - MTMT ER - TY - JOUR AU - Lehotzky, Dávid AU - Mancisidor, Iker AU - Munoa, Jokin AU - Dombóvári, Zoltán TI - Milling Processes With Active Damping: Modeling and Stability JF - JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS J2 - J COMPUT NONLIN DYN VL - 17 PY - 2022 IS - 2 PG - 18 SN - 1555-1415 DO - 10.1115/1.4052723 UR - https://m2.mtmt.hu/api/publication/32772693 ID - 32772693 N1 - Funding Agency and Grant Number: Ministry of Human Resources of the Hungarian Government [UNKP-18-4-BME-193]; National Research, Development and Innovation Office of the Hungarian Government [NKFI PD 124362]; Spanish Ministry of Science and InnovationSpanish Government [EUROSTARS FORTH E!12998] Funding text: Ministry of Human Resources of the Hungarian Government (Grant No.UNKP Bolyaithorn (UNKP-18-4-BME-193)).; National Research, Development and Innovation Office of the Hungarian Government (Grant No. NKFI PD 124362; Funder ID: 10.13039/501100018818).; Spanish Ministry of Science and Innovation (Grant No. EUROSTARS FORTH E!12998). AB - Active dampers are on the verge of appearing in commercial machines as devices that assist the avoidance of machine tool chatter. The adjustment of control parameters in these devices is mostly guided by models that do not consider the dynamics within the control loop of active damper. Therefore, these models neglect the dynamics of actuation, measurement, and filtering, which can result in inaccurate stability predictions that hinder the efficient tuning of active dampers. To formulate a more realistic model for milling processes assisted by active damping, this paper derives a novel mathematical model that takes into account the internal dynamics of the actuator, measuring device, and discrete filtering. This study shows that accurate stability prediction requires the incorporation of actuator and filter dynamics into the model, especially at high spindle speeds and large feedback gains. LA - English DB - MTMT ER - TY - JOUR AU - Lu, Hangyu AU - Stépán, Gábor AU - Lu, Jianwei AU - Takács, Dénes TI - Dynamics of vehicle stability control subjected to feedback delay JF - EUROPEAN JOURNAL OF MECHANICS A-SOLIDS J2 - EUR J MECH A-SOLID VL - 96 PY - 2022 PG - 13 SN - 0997-7538 DO - 10.1016/j.euromechsol.2022.104678 UR - https://m2.mtmt.hu/api/publication/33065796 ID - 33065796 N1 - Funding Agency and Grant Number: China Government [2020-1.2.4-TET-IPARI-2021-00012]; Hungary Government [2020-1.2.4-TET-IPARI-2021-00012]; National Key Research and Development Project of China [2021YFE0116600]; National Natural Science Foundation of China [51875150]; National Research, Development and Innovation Office of Hungary [NKFI-128422, KKP 133846, K 132477] Funding text: This work was supported by the bilateral Research Project between China and Hungary Governments [grant no. 2020-1.2.4-TET-IPARI-2021-00012] ; National Key Research and Development Project of China [grant no. 2021YFE0116600] ; National Natural Science Foundation of China [grant no. 51875150] ; and partly by the National Research, Development and Innovation Office of Hungary [grant no. NKFI-128422, KKP 133846, and K 132477] . AB - Mechanical systems with feedback control commonly contain time delays which usually tend to destabilise the system. With increasing accuracy requirements of data acquisition and calculation, investigation of the effect of the feedback delay including the computational time, actuating time, and signalling time is crucial for developing advanced chassis control. A 2-dimensional vehicle handling model with feedback control torque is introduced to analyse the dynamics of vehicle stability control system. A revised version of the PAC-2002 tyre model is used to create two qualitatively different steering characteristics by tuning the contact friction coefficients at the front and rear wheels. The stability charts in the space of the control gains are constructed. In understeer and oversteer cases, the control gains are optimised to achieve the fastest settling signals against small perturbations. While the optimised gains provide global stability of the cornering manoeuvres in the oversteer case, the gains should be further tuned in the understeer case to ensure fast settling signals and also global stability. The optimisation procedure is presented for various realistic time delays. LA - English DB - MTMT ER - TY - JOUR AU - Marcela, Areyano AU - Eric, Valois AU - Ismael, Carvajal Sanchez1 AU - Ivan, Rajkovic AU - William, R. Wonderly AU - Kossa, Attila AU - Robert, M. McMeeking AU - Herbert, Waite TI - Viscoelastic analysis of mussel threads reveals energy dissipative mechanisms JF - JOURNAL OF THE ROYAL SOCIETY INTERFACE J2 - J R SOC INTERFACE VL - 19 PY - 2022 IS - 188 PG - 10 SN - 1742-5689 DO - 10.1098/rsif.2021.0828 UR - https://m2.mtmt.hu/api/publication/32722681 ID - 32722681 N1 - Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106, United States Biomolecular Science and Engineering Graduate Program, University of California, Santa Barbara, CA 93106, United States Department of Chemistry, University of California, Santa Barbara, CA 93106, United States Materials Research Laboratory, University of California, Santa Barbara, CA 93106, United States Materials Department, University of California, Santa Barbara, CA 93106, United States Marine Science Institute, University of California, Santa Barbara, CA 93106, United States Stanford Synchrotron Radiation Lightsource, Slac National Accelerator Laboratory, Menlo Park, CA 94025, United States Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary School of Engineering, University of Aberdeen, King's College, Aberdeen, AB24 3UE, United Kingdom INM-Leibniz Institute for New Materials, Campus D2 2, Saarbrucken, 66123, Germany Export Date: 4 May 2022 Correspondence Address: Areyano, M.; Department of Mechanical Engineering, United States; email: m_areyano@ucsb.edu Correspondence Address: Waite, J.H.; Marine Science Institute, United States; email: hwaite@ucsb.edu LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Csenge Andrea AU - Insperger, Tamás TI - Critical delay as a measure for the difficulty of frontal plane balancing on rolling balance board JF - JOURNAL OF BIOMECHANICS J2 - J BIOMECH VL - 138 PY - 2022 PG - 9 SN - 0021-9290 DO - 10.1016/j.jbiomech.2022.111117 UR - https://m2.mtmt.hu/api/publication/32860651 ID - 32860651 N1 - Correspondence Address: Insperger, T.; Department of Applied Mechanics, Hungary; email: insperger@mm.bme.hu AB - The relation between balancing performance on rolling balance board and reaction time is investigated. Ten young healthy adults performed balancing trials on a rolling balance board with different wheel radius R and stance widths d in the frontal plane. A 2-and a 3-degree-of-freedom models subject to delayed state feedback with a single lumped reaction delay were created in order to describe hip and hip-lumbar strategies. The critical delays of the underlying models, for which state feedback stabilization is still possible, were determined. This critical delay is a good measure of the difficulty of the balancing task: the smaller the critical delay, the more difficult the balancing task. Subjects' response time to visual stimuli correlates with the critical delay of the models, therefore, it can be used as an indirect indicator for balancing skill. Hip-lumbar strategy was found to be superior to pure hip strategy in the sense that it allows larger reaction delay. Overall, rolling balance board is a simple and convenient tool to assess human's balancing skill. The difficulty of the task can be tuned by employing different wheel radius with different stance widths while it can be measured by a single number: the critical delay of the underlying model. Improvement in balancing skill therefore can easily be monitored during balance therapy and physical rehabilitation. LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Tamás Gábor AU - Cosner, Ryan K. AU - Singletary, Andrew W. AU - Ubellacker, Wyatt AU - Ames, Aaron D. TI - Model-Free Safety-Critical Control for Robotic Systems JF - IEEE ROBOTICS AND AUTOMATION LETTERS J2 - IEEE ROBOT AUTOM LETT VL - 7 PY - 2022 IS - 2 SP - 944 EP - 951 PG - 8 SN - 2377-3766 DO - 10.1109/LRA.2021.3135569 UR - https://m2.mtmt.hu/api/publication/32557126 ID - 32557126 LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Dalma AU - Insperger, Tamás TI - Predictor feedback models for stick balancing with delay mismatch and sensory dead zones JF - CHAOS J2 - CHAOS VL - 32 PY - 2022 IS - 5 SN - 1054-1500 DO - 10.1063/5.0087019 UR - https://m2.mtmt.hu/api/publication/32808299 ID - 32808299 N1 - A 'Terjedelem' rovat kitöltendő. (Fülöp Tamás BME GPK admin5, 2023-08-02) AB - Human stick balancing is investigated in terms of reaction time delay and sensory dead zones for position and velocity perception using a special combination of delayed state feedback and mismatched predictor feedback as a control model. The corresponding mathematical model is a delay-differential equation with event-driven switching in the control action. Due to the sensory dead zones, initial conditions of the actual state cannot always be provided for an internal-model-based prediction, which indicates that (1) perfect prediction is not possible and (2) the delay in the switching condition cannot be compensated. The imperfection of the predictor is described by the delay mismatch, which is treated as a lumped parameter that creates a transition between perfect predictor feedback (zero delay mismatch) and delayed state feedback (mismatch equal to switching delay). The maximum admissible switching delay (critical delay) is determined numerically based on a practical stabilizability concept. This critical delay is compared to a realistic reference value of 230 ms in order to assess the possible regions of the threshold values for position and velocity perception. The ratio of the angular position and angular velocity for 44 successful balancing trials by 8 human subjects was used to validate the numerical results. Comparison of actual human stick balancing data and numerical simulations based on the mismatched predictor feedback model provided a plausible range of parameters: position detection threshold 1°, velocity detection threshold between 4.24 and 9.35°/s, and delay mismatch around 100-150 ms. LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Dániel AU - Plavecz, Lambert AU - Hegedűs, Ferenc TI - The art of solving a large number of non-stiff, low-dimensional ordinary differential equation systems on GPUs and CPUs JF - COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION J2 - COMMUN NONLIN SCI NUMER SIMULAT VL - 112 PY - 2022 PG - 27 SN - 1007-5704 DO - 10.1016/j.cnsns.2022.106521 UR - https://m2.mtmt.hu/api/publication/32839046 ID - 32839046 N1 - Export Date: 3 June 2022 Correspondence Address: Hegedűs, F.; Department of Hydrodynamic Systems, Hungary; email: fhegedus@hds.bme.hu AB - This paper discusses the main performance barriers for solving a large number of independent ordinary differential equation systems on processors (CPU) and graphics cards (GPU). With a naïve approach, for instance, the utilisation of a CPU can be as low as 4% of its theoretical peak processing power. The main barriers identified by the detailed analysing of the hardware architectures and profiling using hardware performance monitoring units are as follows. First, exploitation of the SIMD capabilities of the CPU via vector registers. The solution is to implement/enforce explicit vectorisation. Second, hiding instruction latencies on both CPUs and GPUs that can be achieved with increasing (instruction-level) parallelism. Third, the efficient handling of large timescale differences or event handling using the massively parallel architecture of GPUs. A viable option to overcome this difficulty is asynchronous time stepping. The above optimisation techniques and their implementation possibilities are discussed and tested on three program packages: MPGOS written in C++ and specialised only for GPUs; ODEINT implemented in C++, which supports execution on both CPUs and GPUs; finally, DifferentialEquations.jl written in Julia that also supports execution on both CPUs and GPUs. The tested systems (Lorenz equation, Keller–Miksis equation and a pressure relief valve model) are non-stiff and have low dimension. Thus, the performance of the codes are not limited by memory bandwidth, and Runge–Kutta type solvers are efficient and suitable choices. The employed hardware are an Intel Core i7-4820K CPU with 30.4 GFLOPS peak double-precision performance per cores and an Nvidia GeForce Titan Black GPU that has a total of 1707 GFLOPS peak double-precision performance. LA - English DB - MTMT ER - TY - JOUR AU - Patkó, Dóra AU - Nagy, Ábel Mihály AU - Zelei, Ambrus TI - A futás és szökdelés tömeg-rugó modell dinamikai viselkedésének globális feltérképezése és paraméterhangolása JF - BIOMECHANICA HUNGARICA J2 - BIOMECH HUNG VL - 15 PY - 2022 IS - 1 SP - 39 EP - 50 PG - 12 SN - 2060-0305 UR - https://m2.mtmt.hu/api/publication/33548011 ID - 33548011 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Paul, Sandipan AU - Freed, Alan D. AU - Szabó, László TI - On the use of QR kinematics in studying the Eshelby energy–momentum tensor JF - INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES J2 - INT J SOLIDS STRUCT VL - 254-255 PY - 2022 PG - 11 SN - 0020-7683 DO - 10.1016/j.ijsolstr.2022.111854 UR - https://m2.mtmt.hu/api/publication/33026852 ID - 33026852 N1 - Export Date: 4 August 2022 Correspondence Address: Paul, S.; Department of Civil Engineering, India; email: sandipan.paul@ce.iitr.ac.in AB - We study the Eshelby energy–momentum tensor using QR kinematics, obtained from an upper-triangular decomposition of the deformation gradient. In recent years, a QR decomposition of the deformation gradient has gained attention because of its utility in experiments and constructing constitutive models. In this framework, the constitutive relations can be developed using scalar, conjugate, stress/strain, base pairs that have minimum couplings between them. In this paper, in addition to these scalar stress attributes, we introduce driving force attributes that are thermodynamic conjugates to the dissipative strain attributes. A one-to-one relation between the driving force attributes and the components of Eshelby's energy–momentum tensor, defined in this framework, has been established. These kinetic and kinematic quantities play a key role in the constitutive formulation of a dissipative process. Finally, a classical J2 plasticity model has been derived to illustrate the role of these driving force attributes. LA - English DB - MTMT ER - TY - JOUR AU - Pölöskei, Tamás Hunor AU - Szekrényes, András TI - Dynamic stability analysis of reduced delaminated planar beam structures using extended Craig-Bampton method JF - APPLIED MATHEMATICAL MODELLING J2 - APPL MATH MODEL VL - 102 PY - 2022 SP - 153 EP - 169 PG - 17 SN - 0307-904X DO - 10.1016/j.apm.2021.09.024 UR - https://m2.mtmt.hu/api/publication/32293309 ID - 32293309 N1 - Cited By :2 Export Date: 24 August 2022 CODEN: AMMOD Correspondence Address: Szekrényes, A.; Department of Applied Mechanics, Hungary; email: szeki@mm.bme.hu LA - English DB - MTMT ER -