Abstract: The electronically controlled air suspension can adjust the body height adaptively according to the driving conditions of the bus, which can significantly improve the driving stability and fuel economy of the bus, the design of vehicle height adjustment control is of great significance. Aiming at the phenomenon of "overcharge", "overdischarge" and "oscillation" in the process of height adjustment of electric control air suspension of passenger car, the fuzzy adaptive PID control algorithm is introduced to design the control strategy of height adjustment. The specific process of height adjustment of electric control air suspension of passenger car is analyzed, and the height adjustment system including body, air tank, solenoid valve and air spring is established. Finally, the fuzzy PID control strategy design and performance simulation verification of the height adjustment of the electric control air suspension are completed. The results show that the designed control strategy can realize the accurate adjustment of the body height of the bus electronic air suspension.

Key words: Passenger car; Air suspension; Height adjustment; Fuzzy control PID; Simulation

摘要： 电控空气悬架能够根据客车行驶工况进行车身高度自适应调节，从而能够显著提升客车行 驶稳定性以及燃油经济性，车高调节控制设计具有重要意义。文章利用模糊 PID 控制算法对车身 高度调节进行控制策略设计，有效缓解了客车电控空气悬架车高调节过程中存在的空气弹簧的“过 充”“过放”及“振荡”等问题，分析客车电控空气悬架车高调节具体过程，建立包括车身、储气 罐、电磁阀以及空气弹簧等在内的车高调节系统数学模型，最后完成了客车电控空气悬架车高调 节模糊自适应 PID 控制策略设计及性能仿真验证。研究结果表明，所运用的模糊自适应 PID 控制 策略能够完成客车电控空气悬架车身高度的准确调节。

关键词: 客车；空气悬架；车高调节；模糊控制 PID；仿真