Effect of the tire lateral force saturation on stability control of 4WDEV steering

Abstract

On the acceleration cornering, according to the ideal linear tire model and the vehicle dynamic model, there is a problem of the vehicle stability control. And the control effect is not obvious. Based on the ”uniform model” of tire, this paper establishes the multiple degrees of freedom nonlinear dynamic model of 4WDEV using Matlab/Simulink software, analyzes the stability of vehicle control, accounting the saturation of the lateral force of the tire. And it is proved that the fluctuation of the longitudinal velocity of the vehicle and the acceleration of the steering failure are effectively suppressed by the control strategy of the lateral force saturation. The theoretical basis for the better implementation of the 4WDEV control stability control algorithm is provided.