电动液压助力转向系统对整车操纵稳定性影响分析

Influence of EHPS on Handling and Stability of Vehicle

对电动液压助力转向系统各部分建立数学模型,基于Matlab软件里的S imu link模块对电动液压助力转向系统模型和四自由度车辆模型所组合的系统模型进行仿真。分析了在不同转向盘角阶跃输入速度、不同车速下的横摆角速度和侧向加速度对汽车操纵稳定性的影响,揭示了转向特性与车速和转向盘角阶跃输入速度的内在关系。

In the paper, the math model of EHPS was built firstly, then in the Simulink module of Matlab software, the simulation on 4DOF vehicle model combined with EHPS was done. The influences of many parameters on automobile handing stability were analyzed, this paper posts a inherent relation between steering characteristic and speed, angular step input speed.