横摆力矩和主动前轮转向结合的车辆横向稳定性模糊控制仿真

提出一种基于横摆力矩和主动前轮转向相结合的车辆横向稳定性控制方法,以横摆角速度和侧偏角为控制目标,利用前馈补偿和模糊控制产生横摆力矩和附加的前轮转角,通过控制制动力的分配以及对转向角的修正,使车辆转向行驶时的横摆角速度和侧偏角很好地跟踪参考模型.对转向轮阶跃输入和正弦输入两种工况分别进行了仿真研究,采用横摆力矩和主动前轮转向相结合控制方法,车辆转向时的瞬态及稳态响应优于单独的横摆力矩控制,表明该方法能有效地控制车辆横摆角速度和侧偏角,提高车辆转向时的横向稳定性,同时能有效地减轻驾驶员操纵负担.

A Simulation of Fuzzy Control to Improve Vehicle Yaw Stability Combined Yaw Moment Control and Active Front Steering

A fuzzy control method is proposed to improve vehicle yaw stability by the integrated control of yaw moment control and active front steering. The control strategy using feed- forward and feedback compensator is proposed, which produces direct yaw moment and front steering angle to control yaw rate and side slip angle, by actively controlling the front steering angle and the distribution of braking forces, the integrated control system makes the performance of the actual vehicle model follow that of an ideal vehicle model. A simulation is performed at two different conditions, the results showed that the transient and steady response by the presented method is better than that by DYC only, and the presented method can effectively control the yaw rate and side slip angle synchronously, achieve good transient and steady response, and at the same time lighten the burden of the driver.