半被动悬架系统对汽车侧翻稳定性的改善

Side tumbling stability of vehicle with semi-passive suspension system

针对汽车侧翻事故,提出采用半被动悬架系统来改善汽车侧翻稳定性的方法,建立了与系统相对应的模型,并对减振器阻尼档位调节的控制方式进行了讨论,确定了阻尼档位随侧向加速度而变化的关系。对系统的模拟分析得到,若对半被动悬架系统实施相应的控制,汽车在非直线行驶时的最大侧倾角、侧倾角速度和侧倾角加速度分别下降了66.5%、64.3%和65.0%,侧翻因子下降了36.8%,从而改善了汽车的侧倾状态,提高了汽车的侧翻稳定性。

This paper puts forth semi-passive suspension system to improve automobile side tumbling stability, establishes a system model, analyzes the control method of vibration absorber damp step adjustment. The relation of damp step and side acceleration is defined. Simulation results show that the roll angle, roll angular velocity and roll angular acceleration of vehicle with semi-passive suspension system are respectively decreased 66.5%, 64.3% and 65.0% on non-linear driving condition, the factor of side tumbling is reduced 36.8%. So the roll state and side tumbling stability of vehicle are improved. 7 figs, 7 refs.