电控空气悬架电流闭环控制系统开发

董传平¹，李军伟^1*，周英超¹，张广世²，李凯²，岳涵²，单坤山³

1.山东理工大学交通与车辆工程学院，山东 淄博  255049；

2.天润智能控制系统集成有限公司，山东 文登  264413； 3.潍柴雷沃重工股份有限公司，山东 潍坊  261206

摘要：为实现对电控空气悬架阻尼的精准调节，以MC9S12XEP100单片机为核心部件，设计基于A3942四通道高边栅极驱动器和采用增量式比例积分微分（proportion integral differential，PID）控制算法的电流闭环控制系统，开发故障诊断系统，通过实际应用测试系统对空气悬架阻尼的调节及闭环控制。结果表明：电流闭环控制系统能够实现空气悬架比例电磁阀驱动电流的精确控制，误差控制在±3 mA以内，能够精确控制空气悬架阻尼；故障诊断系统能够实时显示当前故障状态及维修建议。该系统可以为空气悬架阻尼的精准调节提供参考。

关键词：空气悬架；增量式PID；电流闭环控制；A3942；MC9S12XEP100

Development of current closed loop control system for electronically controlled air suspension

DONG Chuanping¹, LI Junwei^1*, ZHOU Yingchao¹, ZHANG Guangshi², LI Kai², YUE Han²,SHAN Kunshan³

1.School of Traffic and Vehicle Engineering, Shandong University of Technology,Zibo 255049,China;

2.Tianrun Intelligent Control System Integration Co., Ltd.,Weihai 264413,China;

3.Weichai Lovol Heavy Industry Co.,Ltd.,Weifang 261206, China

Abstract：In order to realize the accurately control the driving current of air suspension proportional solenoid valve, choosing MC9S12XEP100 microcontroller as the core component, based on the current closed-loop control system of A3942 four-channel high-edge gate driver, a current closed-loop control system using incremental proportional integral differential(PID) control algorithm is designed, and a fault diagnosis system is developed. The practical application test is also carried out. The test shows that the designed current closed-loop control system can accurately control the driving current of air suspension proportional solenoid valve, and the error is within ±3 mA, which can accurately control the damping of electroniccontrolled air suspension,fault diagnosis system can display the current fault status and maintenance suggestions in real time.The system can provide reference for the accurate adjustment of air suspension damping.

Keywords:air suspension; incremental PID; current closed-loop control;A3942;MC9S12XEP100