关键词: 地铁列车, 电空混合制动, 制动力再分配, 优化控制, 轴重转移

Abstract: 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.

Key words: subway train, electro-pneumatic cooperative control, braking force further distribution, optimization control, axle load transfer