基于EP2002制动系统的地铁列车制动仿真控制系统

Metro Train Braking Simulation Control System Based on EP2002 Braking System

[目的]为解决EP2002阀内部高度集成,无法实现内部故障注入的问题,设计了一套能够正确反映EP2002制动系统作用机制的地铁车辆制动仿真控制系统,用于地铁列车制动系统的故障仿真与人员培训。[方法]介绍了EP2002阀系统的气路结构与作用机制,从电路部分和气路部分分别阐述了基于EP2002的地铁列车制动仿真控制系统总体方案。基于AMESim仿真软件,分别对EP2002制动系统与地铁列车制动仿真控制系统进行了常用制动与紧急制动下的气路仿真试验,从而验证二者制动特性的一致性。[结果及结论]基于EP2002的地铁列车制动仿真控制系统总体方案使用基本气路元件构建出具有同等特性的EP2002阀等效单元气路。对气路中较为复杂部分,基于容腔充放气的数学模型采用时间步长仿真法使用软件虚拟仿真对其进行等效。使用基于STM32F107单片机的控制单元实现对气路部分的监测与控制,同时负责各个EP2002阀等效单元之间的通信。地铁列车制动仿真控制系统采用与EP2002制动系统相同的组网结构,多个EP2002阀等效单元通过CAN总线与车辆总线组网构建起基于EP2002制动系统的制动仿真控制系统,以较为低廉的成本实现了对整列车制动系统的仿真。AMESim模型仿真结果显示:地铁列车制动仿真控制系统能够以较快的响应速度与较高的控制精度,将制动缸压力控制在目标值,其制动外特性与EP2002制动系统完全一致。

[Objective]To address the issue of the highly integrated internal structure of the EP2002 valve system,which hinders internal fault injection,a metro train braking simulation control system that accurately reflects the functioning mechanism of the EP2002 braking system is designed.The system is intended for fault simulation and personnel training in metro train braking systems.[Method]The air circuit structure and operating mechanism of the EP2002 valve system are introduced,and the overall scheme of the metro train braking simulation control system based on EP2002 is elaborated separately for the electrical and pneumatic components.Using AMESim simulation software,common and emergency braking experiments are conducted to simulate the air circuit of the EP2002 braking system and the metro train braking simulation control system respectively,and the consistency of their braking characteristics is verified.[Result&Conclusion]The overall scheme of the metro train braking simulation control system based on EP2002 utilizes basic air circuit components to construct an equivalent unit circuit with properties identical to the EP2002 valve.For the more complex parts of the air circuit,a mathematical model based on chamber air filling and venting is employed using time-stepping simulation in the software for equivalence.The control unit based on the STM32F107 microcontroller is used for monitoring and controlling the pneumatic section,as well as managing communication between various equivalent EP2002 valve units.The metro train braking simulation control system adopts networking structure similar to EP2002 braking system,with multiple equivalent EP2002 valve units interconnected through a CAN bus and vehicle bus to establish a braking simulation control system based on the EP2002 braking system,achieving cost-effective simulation of the entire train braking system.AMESim model simulation results indicate that the metro train braking simulation control system can maintain brake cylinder pressure at the target value with faster response speed and higher control precision,exhibiting external braking characteristics completely consistent with the EP2002 braking system.