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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2012  >  12(6): 35-40
QI Zhuang, LI Fei, DING Jun-jun. Braking optimization method of wagon under limit adhesion[J]. Journal of Traffic and Transportation Engineering, 2012, 12(6): 35-40. doi: 10.19818/j.cnki.1671-1637.2012.06.006
Citation: QI Zhuang, LI Fei, DING Jun-jun. Braking optimization method of wagon under limit adhesion[J]. Journal of Traffic and Transportation Engineering, 2012, 12(6): 35-40. doi: 10.19818/j.cnki.1671-1637.2012.06.006
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Braking optimization method of wagon under limit adhesion

doi: 10.19818/j.cnki.1671-1637.2012.06.006

  • School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

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    Abstract
  • Based on the wheel/rail contact model of Polach's large creep theory, the creepage corresponding the saturated adhesion coefficient was determined in the brake condition of wagon. As block pressure was taken as the optimization objective and the creepage was taken as the objective function, vehicle dynamics model was built in SIMPACK environment under considering braking system. By ARX system identification, the reference system of creepage response was modelled in SIMULINK environment. On the purpose that the creepages of MBS model and reference model kept consistent during the brake, the creepage response was tracked by using MIT adaptive control technic, and an optimized method to apply block pressure was obtained. Compared with other ordinary methods, the optimized method decreases 71.6% of the maximal creepage and 11.8% of vehicle velocity at braking end, which can effectively eliminate wheel/rail slide and shorten the brake distance to a certain extent.

     

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