基于空气弹簧充放气特性的汽车运行姿态控制

Attitude control of automobile based on inflation/deflation of air spring

根据汽车的工作特点,结合空气弹簧的充放气特性,设计了汽车运行姿态控制系统及其控制策略.为了提高汽车的侧向稳定性,设计了空气悬架刚度调节控制器,在侧倾危险状况下,及时调整空气悬架的刚度,提高了汽车的侧向稳定性,减少了汽车侧翻事故的发生.为了满足常规工况下的工作装置需要,设计了车身水平位置调节控制器,控制车身的水平位置.在汽车行驶速度为80 km.h-1、方向盘转角为200°的情况下进行仿真试验,汽车左侧空气悬架的刚度上升了12.5%,右侧空气悬架刚度下降了13.3%,汽车侧倾角稳定在4.1°.结果表明汽车运行姿态控制系统能够较好地控制汽车运行姿态.

According to the automobile working characteristics and the air spring inflation/deflation performance, the control system and strategies of the automobile running attitude were proposed. In order to improve the vehicle lateral stability, the controller of air suspension stiffness adjustability was designed. Under the dangerous condition of automobile roll, the controller can adjust the air suspension stiffness to improve the vehicle lateral stability and reduce the occurrence of side tumbling crash accidents. To meet the requirement of working equipment under normal working conditions, the controller of body horizontal position adjustment was designed to control the horizontal position of vehicle body. The simulation experiment was conducted with the vehicle speed of 80 km · h^-1 and steering wheel angle of 200°. The rigidity of left air suspension was raised by 12.5% with decreased rigidity of 13.3% for fight air suspension, while the roll angle was stable at 4.1 °. The results show that the vehicles running attitude can be well controlled by the proposed control system.