Study of direct yaw moment control for IEV to improve handling and stability control

Direct yaw moment becomes an external input to in-wheel-motors (IWMs) electric vehicles (IEVs) besides steering angle usually as the only input to traditional vehicles. To improve the handling and stability of IEVs, a good knowledge of the effect brought by direct yaw moment is necessary. First, in this paper, reference model based on 2 DOF bicycle model is built for the control strategy. Second, vehicle model is built, and DYC based on sliding mode algorithm is proposed by using model based control method to evaluate the impact on the vehicle behavior. Then, simulations on different maneuvers are carried out and the values of vehicle states are compared especially in wheel steering angles and axle sideslip angles. Finally, conclusions are given.