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Keywords: railway brake systems, brake simulation, mathematical modelling, mechanical systems, brake distribution in trains, pneumatic brakes, control of railway brakes.

Summary

Pneumatic brakes are commonly used in heavy haul trains for economic reasons. The pneumatic brake system is comprised of a series of valves and chambers that respond to a logic of pneumatic and mechanical interactions. In this paper a mathematical model that reproduces the dynamic response of the system is presented, based on the physical behaviour of the fluid (compressed air) and the AB brake valves in responses to pressure variation in the brake pipeline. The pressures and air speeds along the pipeline are calculated using conservation equations. The pressure in each chamber of the system is calculated as a function of the inlet mass-flow and the pressure in the chambers next to it. The model was manipulated to show the pressure variation as a function of time. Based on numerical integration using a Taylor series, the model was implemented in Matlab®, so that the instantaneous pressure response in each reservoir of the system could be visualized in a graphical format. The model was adjusted to fit real data of a ten car train provided by an ore transportation company and it was compared with the real data of one and fifty cars trains. The results show good agreement between the model and the supplied data.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 325 Simulation of a Railway Pneumatic Brake Controller A.A. Santos¹, P.R.G. Kurka¹, T.S. Martins², D.F. Ribeiro¹ and I.P. Teodoro¹ ¹Department of Integrated Systems, University of Campinas, Brazil ²Logistics Engineering Center, VALE S.A., Vitória, Brazil doi:10.4203/ccp.110.325 purchase the full-text of this paper Full Bibliographic Reference for this paper A.A. Santos, P.R.G. Kurka, T.S. Martins, D.F. Ribeiro, I.P. Teodoro, "Simulation of a Railway Pneumatic Brake Controller", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 325, 2016. doi:10.4203/ccp.110.325 Keywords: railway brake systems, brake simulation, mathematical modelling, mechanical systems, brake distribution in trains, pneumatic brakes, control of railway brakes. Summary Pneumatic brakes are commonly used in heavy haul trains for economic reasons. The pneumatic brake system is comprised of a series of valves and chambers that respond to a logic of pneumatic and mechanical interactions. In this paper a mathematical model that reproduces the dynamic response of the system is presented, based on the physical behaviour of the fluid (compressed air) and the AB brake valves in responses to pressure variation in the brake pipeline. The pressures and air speeds along the pipeline are calculated using conservation equations. The pressure in each chamber of the system is calculated as a function of the inlet mass-flow and the pressure in the chambers next to it. The model was manipulated to show the pressure variation as a function of time. Based on numerical integration using a Taylor series, the model was implemented in Matlab®, so that the instantaneous pressure response in each reservoir of the system could be visualized in a graphical format. The model was adjusted to fit real data of a ten car train provided by an ore transportation company and it was compared with the real data of one and fifty cars trains. The results show good agreement between the model and the supplied data. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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