车辆转向过程稳定性分析与控制

Analysis and control of vehicle stability of passenger cars during steering

为提升车辆稳定性控制系统(VDC)的性能,综合考虑前轮转角、车速和路面附着,提出一个车辆转向过程中的稳定性指标。基于该稳定性指标,得到综合考虑车辆动力性、操控性和稳定性的车速上限。制定了一种车速控制和主动横摆力矩联合控制的控制策略,同时控制发动机扭矩和主动横摆力矩。实车实验证明了该控制策略在高速、大转向角时的有效性。

Vehicle dynamic control （VDC） can be improved by use of a stability factor which include the steer angle, velocity, and road adhesion. A vehicle upper speed limit during steering is given based on this stability factor, which includes the drivability, controllability, and stability. A control algorithm including velocity control and active yaw moment control, which controls the engine torque and active yaw moment, has been proved to be useful in vehicle tests at high speeds and large steer wheel angles.