基于前后轮联动转向的菱形客车操纵稳定性研究

根据菱形客车底盘布置的特殊性,建立了前后轮联动转向的二自由度操纵模型.在此基础上,推导出菱形客车的稳定性因数,从而确定了满足不足转向的条件;同时还分析了菱形客车的操纵稳定性以及整车参数变化对其产生的影响.结果表明:菱形客车的操纵稳定性受整车质量影响较小,而受前后轴轴距和整车质心位置的影响较大.不足转向条件和各参数变化对整车操纵稳定性的影响规律将有助于菱形客车的总体设计,具有较好的工程参考意义.

Research for the Vehicle Handling Stability of Rhombic Bus Based on Front/Rear Wheel Linkage Steering

According to the particularity of the rhombic bus chassis layout,two degrees of freedom(2-DOF) handling model were established based on front/rear wheel linkage steering.Based on the model,the stability factor was deduced,and the condition satisfying under steering was determined.At the same time,the vehicle handling stability was analyzed,and the effect on the handling stability caused by the vibration of vehicle parameters was analyzed.The analysis results have shown that the influence caused by the mass of the vehicle is very small on the vehicle handling stability,but the influence caused by the wheelbase and the position of center of mass is greater.The condition satisfying under steering and the influence caused by the changes of parameters on the vehicle handling stability will contribute to the overall design of the rhombic bus,and will have better reference value for engineering.