Abstract
According to vehicle dynamic principle and vehicle handling stability analysis, a three degrees of freedom dynamic model of the four-wheel steering vehicle is established. According to the fuzzy control theory, on the basis of the influence of the front wheel steering angle and the speed on the rear wheel, a fuzzy controller to determine the size of rear wheel steering angle is established. Finally, the sine angle input test of front wheel is performed by using the Matlab/Simulik software, and the simulation is compared with the front wheel steering vehicle. The simulation analysis results show that the four wheel steering vehicle steering control system can effectively reduce the sideslip angle, yaw rate and roll angle of the peak values and the change rates, and can effectively improve the handling and stability of vehicle steering.
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