Abstract

Abstract A control algorithm based on fuzzy logic is proposed to improve the straight line stability of four wheel drive vehicle with hub motor. This paper establishes the combined vehicle model based on CarSim and MATLAB, and researches the influence of cross wind on four wheel drive vehicle of different wind angle, wind speed and vehicle velocity. Then, the direct yaw-moment control model based on fuzzy logic is established to improve the handling stability of vehicle under the cross wind. The results proves that velocity of vehicle make biggest difference to the influence on vehicle under the cross wind, and the DYC model can decline the amplitude of yaw rate and improve the straight line stability of vehicle well.

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