二自由度车辆动力学模型的扩展研究

Research on extension of two degree of freedom vehicle dynamics model

为描述极限工况下车辆动力学性能,该文在线性二自由度模型研究基础上,根据纵向车速、等效侧偏刚度的变化规律,对线性二自由度模型进行扩展,通过仿真总结扩展二自由度模型在对操纵稳定性分析中的作用。实车试验数据验证表明,两种模型可结合以提高对车辆状态的跟踪。

To describe the dynamic property of vehicle in limit region,based on the linear two degrees of freedom vehicle model,considering the dynamic property between longitudinal velocity and side slip stiffness coefficient,the paper extended the former model,and analyzed the effect of extended two degrees of freedom in vehicle handling and stability research. According to the test data confirmation,the joint of two types of model will improve the tracking of vehicle state.