新一代动车组制动缸压力控制方法研究

Research on Pressure Control Method of New Generation EMU Brake Cylinder

为适应新一代动车组对制动控制精度和响应时间的要求,本研究提出了一种带参数估计的制动缸压力双闭环控制方法。在电子制动控制单元软件中设计相关程序,利用制动试验获取电空转换电磁阀控制参数,在列车运行过程中学习并更新压力变换阀输入输出关系,提出了紧急制动时制动缸压力的控制策略调整方法,实现了预控压力和制动缸压力的双闭环控制。本方法在某型号高速综合检测列车上进行了实施和验证,结果表明,方法具备良好的可用性,制动缸压力控制误差能够达到±5 kPa以内,紧急制动时压力上升响应时间缩短至1.5 s,电磁阀动作次数减少至2~3次,能够满足未来动车组对空气制动系统控制性能的要求。

In order to meet the requirements of the new generation of EMUs for braking control accuracy and response time,this study proposes a double closed-loop control method of brake cylinder pressure with parameter estimation.The relevant program is designed in the electronic brake control unit software.The control parameters of the electro-pneumatic conversion solenoid valve are obtained by using the brake test process.The input and output relationship of the pressure conversion valve is learned and updated during the train operation.The control strategy adjustment method of the brake cylinder pressure during emergency braking is proposed,and the double closed-loop control of the pre-control pressure and the brake cylinder pressure is realized.This method has been implemented and verified on a certain type of high-speed comprehensive detection train.The results show that the method has good usability,the brake cylinder pressure control error can reach within±5 kPa,the pressure rise response time during emergency braking is shortened to 1.5 s,and the number of solenoid valve actions is reduced to 2-3 times,which can meet the requirements of the future EMU on the control performance of the air brake system.