摘要
研究了电控空气悬架(ECAS)充放气的过程,结合变质量充放气系统的热力学和车辆动力学理论,推导出空气悬架客车车身高度调节的数学模型;分析了高度切换中的"过充"、"过放"及振荡现象,提出了变速积分的PID/PWM高度控制策略并进行了模拟仿真。半实物台架试验验证表明,所设计控制系统能够满足高度调节要求。
The charging ＆ discharging process of the electrically controlled air suspension （ECAS） was studied, and a mathematical model of body height modulation was derived for bus by combining theories of thermodynamics of variable-mass charging/discharging system and vehicle dynamics. The problems of ＂over-charging＂, ＂over-discharging＂ and oscillation during height switchover were analyzed, and a height control strategy of variable integrator PID/PWM was proposed and simulated. Finally the semi-physical rig testing proves that the designed control system satisfies the requirement of height modulation.
出处
《汽车技术》
北大核心
2009年第11期42-46,共5页
Automobile Technology
基金
浙江省重大科技专项重点项目(2006C11089)
关键词
客车
车身
电控空气悬架
高度控制
变速积分
Bus
Body
Electrically controlled air suspension
Height control
Variable-integrator
