TY - JOUR AU - Márton, Lőrinc AU - Szederkényi, Gábor AU - Hangos, Katalin TI - Modeling and control of networked kinetic systems with delayed interconnections JF - JOURNAL OF PROCESS CONTROL J2 - J PROCESS CONTR VL - 130 PY - 2023 PG - 14 SN - 0959-1524 DO - 10.1016/j.jprocont.2023.103084 UR - https://m2.mtmt.hu/api/publication/34167311 ID - 34167311 N1 - Department of Electrical Engineering, Sapientia Hungarian University of Transylvania, Tirgu Mures, Romania Systems and Control Laboratory, Institute for Computer Science and Control, Hungarian Academy of Sciences, Budapest, Hungary Faculty of Information Technology and Bionics, Pázmany Péter Catholic University, Budapest, Hungary Department of Electrical Engineering and Information Systems, University of Pannonia, Veszprém, Hungary Export Date: 10 October 2023 CODEN: JPCOE Correspondence Address: Márton, L.; Department of Electrical Engineering, Romania; email: martonl@ms.sapientia.ro LA - English DB - MTMT ER - TY - JOUR AU - Kurniawan, Wijaya AU - Hangos, Katalin AU - Márton, Lőrinc TI - Fault Isolation and Estimation in Networks of Linear Process Systems JF - ENTROPY J2 - ENTROPY-SWITZ VL - 25 PY - 2023 IS - 6 PG - 26 SN - 1099-4300 DO - 10.3390/e25060862 UR - https://m2.mtmt.hu/api/publication/33915500 ID - 33915500 N1 - Export Date: 18 December 2023 Correspondence Address: Kurniawan, W.; Department of Electrical Engineering and Information Systems, Hungary; email: wijaya.kurniawan@mik.uni-pannon.hu AB - Fault detection and isolation is a ubiquitous task in current complex systems even in the linear networked case when the complexity is mainly caused by the complex network structure. A simple yet practically important special case of networked linear process systems is considered in this paper with only a single conserved extensive quantity but with a network structure containing loops. These loops make fault detection and isolation challenging to perform because the effect of fault is propagated back to where it first occurred. As a dynamic model of network elements, a two input single output (2ISO) LTI state-space model is proposed for fault detection and isolation where the fault enters as an additive linear term into the equations. No simultaneously occurring faults are considered. A steady state analysis and superposition principle are used to analyse the effect of faults in a subsystem that propagates to the sensors’ measurements at different positions. This analysis is the basis of our fault detection and isolation procedure that provides the position of the faulty element in a given loop of the network. A disturbance observer is also proposed to estimate the magnitude of the fault inspired by a proportional-integral (PI) observer. The proposed fault isolation and fault estimation methods have been verified and validated by using two simulation case studies in the MATLAB/Simulink environment. LA - English DB - MTMT ER - TY - CHAP AU - Hangos, Katalin TI - Keynote Talk: Qualitative model based diagnosis of complex systems using decomposition T2 - Proceedings of 7th International Conference on Sustainable Information Engineering and Technology, SIET 2022 PB - Association for Computing Machinery (ACM) CY - New York, New York SN - 9781450397117 PY - 2022 SP - 1 EP - 1 PG - 1 DO - 10.1145/3568231.3568232 UR - https://m2.mtmt.hu/api/publication/33579180 ID - 33579180 LA - English DB - MTMT ER - TY - CHAP AU - Kurniawan, Wijaya AU - Hangos, Katalin AU - Márton, Lőrinc TI - Parameter fault estimation in distributed heating/cooling systems T2 - Proceedings of 7th International Conference on Sustainable Information Engineering and Technology, SIET 2022 PB - Association for Computing Machinery (ACM) CY - New York, New York SN - 9781450397117 PY - 2022 SP - 111 EP - 118 PG - 8 DO - 10.1145/3568231.3568256 UR - https://m2.mtmt.hu/api/publication/33575910 ID - 33575910 N1 - Faculty of Computer Science, University of Brawijaya, Malang, Indonesia Dept. of Electrical Engineering and Information Systems, University of Pannonia, Veszprem, Hungary Institute for Computer Science and Control, Budapest, Hungary Dept. of Electrical Engineering, Sapientia Hungarian University of Transylvania, Targu Mures, Romania Conference code: 186110 Export Date: 14 February 2023 Correspondence Address: Kurniawan, W.; Faculty of Computer Science, Indonesia; email: wjaykurnia@ub.ac.id AB - In this paper, the problem of fault estimation and localization in the connecting dynamic elements of distributed heating and cooling systems are treated. The fault represents the physical parameter change related to the heat transfer between the system and the external environment. First, based on the bi-linear dynamic state space model of the system in the presence of a fault, structural observability analysis using Signed Directed Graph (SDG) has been performed to investigate the sensor placement problem. Then, a nonlinear observer with a parameter adaptation algorithm was proposed for fault estimation. The simulation results show that it can successfully detect and estimate the fault. Fault localization along the length of the element has also been attempted, but it has been found that the localization cannot be performed using practically changeable input variables. Frequency domain analysis is presented to discuss this phenomenon. LA - English DB - MTMT ER - TY - JOUR AU - Kurniawan, Wijaya AU - Hangos, Katalin AU - Márton, Lőrinc TI - Parameter fault diagnosis in heat exchange networks with distributed time delay JF - IFAC PAPERSONLINE J2 - IFACOL VL - 55 PY - 2022 IS - 18 SP - 39 EP - 44 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2022.08.027 UR - https://m2.mtmt.hu/api/publication/33044013 ID - 33044013 AB - This paper deals with parameter fault diagnosis in heat exchange networks (HENs) with joining and splitting connections where the change in the heat transfer coefficient is considered as fault. The fault diagnosis oriented model of the HEN elements was developed based on the equivalent LTI realization of distributed delay models. The Signed Directed Graph (SDG) method is used to derive the fault observability conditions. The presence of faults induces bi-linear fault-input terms into the system model. Thus, a nonlinear adaptive observer was proposed for fault diagnosis. To verify and validate the proposed method, a case study is presented. The simulation results show that the observers are successfully detecting and estimating the faults and unknown system states. LA - English DB - MTMT ER - TY - JOUR AU - Károlyi, György AU - Pózna, Anna Ibolya AU - Hangos, Katalin AU - Magyar, Attila TI - An Optimized Fuzzy Controlled Charging System for Lithium-Ion Batteries Using a Genetic Algorithm JF - ENERGIES J2 - ENERGIES VL - 15 PY - 2022 IS - 2 PG - 23 SN - 1996-1073 DO - 10.3390/en15020481 UR - https://m2.mtmt.hu/api/publication/32587428 ID - 32587428 LA - English DB - MTMT ER - TY - JOUR AU - Hangos, Katalin AU - Lipták, György AU - Szederkényi, Gábor TI - Structural reduction of CRNs with linear sub-CRNs JF - IFAC PAPERSONLINE J2 - IFACOL VL - 54 PY - 2021 IS - 14 SP - 149 EP - 154 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2021.10.344 UR - https://m2.mtmt.hu/api/publication/32235153 ID - 32235153 LA - English DB - MTMT ER - TY - JOUR AU - Márton, Lőrinc AU - Hangos, Katalin AU - Magyar, Attila TI - Passivity of Lotka–Volterra and quasi-polynomial systems JF - NONLINEARITY J2 - NONLINEARITY VL - 34 PY - 2021 IS - 4 SP - 1880 EP - 1899 PG - 20 SN - 0951-7715 DO - 10.1088/1361-6544/abd52b UR - https://m2.mtmt.hu/api/publication/31882061 ID - 31882061 N1 - Export Date: 23 September 2021 Correspondence Address: Márton, L.; Department of Electrical Engineering, Romania; email: martonl@ms.sapientia.ro Funding details: 131501 Funding text 1: This study was supported by the National Research, Development and Innovation Fund of Hungary, financed under the K_19 funding scheme, Project No. 131501. LA - English DB - MTMT ER - TY - JOUR AU - Lipták, György AU - Hangos, Katalin AU - Szederkényi, Gábor TI - Stabilizing feedback design for time delayed polynomial systems using kinetic realizations JF - EUROPEAN JOURNAL OF CONTROL J2 - EUR J CONTROL VL - 57 PY - 2021 SP - 163 EP - 171 PG - 8 SN - 0947-3580 DO - 10.1016/j.ejcon.2020.06.007 UR - https://m2.mtmt.hu/api/publication/31381185 ID - 31381185 N1 - Export Date: 18 November 2022 CODEN: EJCOF Correspondence Address: Lipták, G.; Faculty of Information Technology and Bionics, Práter u. 50/a, Hungary; email: lipgyorgy@scl.sztaki.hu LA - English DB - MTMT ER - TY - JOUR AU - Márton, Lőrinc AU - Hangos, Katalin AU - Szederkényi, Gábor TI - Disturbance Attenuation via Nonlinear Feedback for Chemical Reaction Networks JF - IFAC PAPERSONLINE J2 - IFACOL VL - 53 PY - 2020 IS - 2 SP - 11497 EP - 11502 PG - 6 SN - 2405-8971 DO - 10.1016/j.ifacol.2020.12.591 UR - https://m2.mtmt.hu/api/publication/31628502 ID - 31628502 LA - English DB - MTMT ER -