精细积分法在车辆动力学仿真中的应用

Application of Direct Time Integration in Vehicle Dynamic Simulation

Euler积分方法在解决具有刚性问题的微分方程时不能够很好地满足车辆动力学仿真的需要。采用精细积分法 ,将其应用于纯侧向车辆动力学模型中 ,并与相同工况下Euler积分方法的仿真结果进行了比较 ,解决了Euler积分方法在车轮低转速、积分大步长的情况下无法得到稳定仿真结果的问题。

For Euler integration method cannot satisfy the need of vehicle dynamics simulation when the stiffness differential equation is to be solved.In this paper,a Direct Time integration method is put forward which is applied to treat the lateral vehicle dynamics model.Comparing the simulation results with that obtained by Euler integration method under the same conditions, the problem is solved that using Euler integration method,the steady simulation results under high integration interval and low wheel speed are not obtained.