@inproceedings{MTMT:1632961, title = {Computational and Experimental Investigation on Dynamics of Electric Braking Systems}, url = {https://m2.mtmt.hu/api/publication/1632961}, author = {Szente, Viktor and Vad, János and Lóránt, Gábor and Fries, Ansgar}, booktitle = {7th Scandinavian International Conference on Fluid Power (SICFP'01)}, unique-id = {1632961}, abstract = {Electro-pneumatic (EP) components are frequently used in brake systems of commercial vehicles. The simulation of EP brake systems is of great importance in order to understand their dynamics for developing a control logic being robust but fulfilling the modern functional demands. On the other hand, the simulation aids the design of EP components being able to execute the commands of a precision control. The paper presents a flexible computational simulation tool being applied in industrial research and development related to complex mechatronics in brake systems for commercial vehicles. The Electric Braking System (EBS) case study presented herein comprises an air supply unit, an EBS modulator, piping, a diaphragm brake chamber, and the connected brake mechanism. The simulation environment is AMESim® 3.0. Considering the complexity of the EP components and the related phenomena, special models have been elaborated for the solenoid valves, piping, and the diaphragm brake chamber. The simulation results show good agreement with measurement data. The comparative numerical and experimental study confirmed that the simulation tool can be effectively used in design, research and development of EP brake systems.}, year = {2001}, pages = {263-276}, orcid-numbers = {Szente, Viktor/0000-0002-0588-7726; Vad, János/0000-0001-5589-1603} } @article{MTMT:1632963, title = {Gas Dynamic Pipe Flow Effects in Controlled Pneumatic Systems - A Simulation Study}, url = {https://m2.mtmt.hu/api/publication/1632963}, author = {Szente, Viktor and Hős, Csaba János and Istók, Balázs and Vad, János and Kristóf, Gergely}, journal-iso = {PERIOD POLYTECH MECH ENG}, journal = {PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING}, volume = {45}, unique-id = {1632963}, issn = {0324-6051}, abstract = {Electro-pneumatic modulators (EPMs) are widely used in controlled pneumatic systems. Their aim is to ensure a controlled operating pressure modulated at a high accuracy and high temporal resolution. This paper reports a computational case study representing the influence of gas dynamic pipe flow effects on the operation of a pneumatic system to be controlled by means of an EPM. The simulation has been carried out with use of simulation software AMESim version 3.01. Given that no standard gas dynamic pipe model and electro-dynamically-relevant solenoid valve model are included in the present version of the simulation software, such models had to be elaborated by the authors. The simulation studies reveal that the self-developed gas dynamic pipe model resolves properly the wave effects and flow fluctuations expected from a realistic pneumatic pipe performing high velocity flow. The simulation must accurately resolve such phenomena if the computational study aims to provide an aid to the design of a proper pressure control loop. It has been concluded that a gas dynamic pipe model, covering reliably the physically possible entire Mach number range, is essential in simulation of pneumatic systems.}, year = {2001}, eissn = {1587-379X}, pages = {239-250}, orcid-numbers = {Szente, Viktor/0000-0002-0588-7726; Hős, Csaba János/0000-0002-1930-515X; Istók, Balázs/0000-0002-0248-0074; Vad, János/0000-0001-5589-1603; Kristóf, Gergely/0000-0001-7572-6875} } @inbook{MTMT:1002656, title = {Delay-differential equation models for machine tool chatter}, url = {https://m2.mtmt.hu/api/publication/1002656}, author = {Stépán, Gábor}, booktitle = {Dynamics and Chaos in Manufacturing Processes}, unique-id = {1002656}, year = {1998}, pages = {165-192}, orcid-numbers = {Stépán, Gábor/0000-0003-0309-2409} }