地铁列车制动力再分配优化控制研究

Research on optimization control of braking force further distribution for subway train

针对现有地铁列车在电-空制动力分配控制策略中没有充分考虑各轴应施加制动力存在差异的问题,对制动力再分配优化控制算法进行了研究。在对电制动优先的电-空制动力协调分配算法进行分析的基础上,以北京某地铁列车中2动1拖基本制动单元为研究对象,基于轴重转移原则,提出了根据各轮对所承受压力的大小按比例再分配空气制动力的优化控制算法,并通过Matlab/Simulink软件对地铁列车处于不同制动工况下制动力的再分配情况进行了仿真和分析。仿真结果表明,基于轴重转移的各轴空气制动力再分配优化控制策略有助于改善列车防滑性能、提高列车平稳制动的效果,达到了预期目标。

For the problem that the electro-pneumatic braking force distribution strategy of existing subway trains hasn＇t fully considered the different demands of braking force applied to different train axles, the optimization control algorithm of the further distribution of braking force on different train axles is presented. On analysis of electro-pneumatic cooperative control strategy of electric brake priority for the basic control unit making up of 2 motor cars and 1 trailer car in the certain Beijing subway train, the optimization algorithm based on the axle load transfer is put forward, which proposes that the braking force is applied proportionally to different train axles in terms of the pressures withstood by their corresponding wheel pairs. By using Matlab/Simulink software to model and simulate above algorithm, the braking force distribution and changes under different braking conditions are analyzed. The results show that the braking force further distribution optimization strategy which is based on the axle load transfer helps to improve the anti-slip property and stable braking effect. And the expected result has been achieved.