Coordinated control of differential drive assisted steering system with vehicle stability enhancement system

Drive torque coordinated control for four wheel independent-drive electric vehicle with differential drive assisted steering system (DDAS) is presented in this paper. Firstly, the technical detail of DDAS system is reviewed. Then a structure composed of two layers coordinating control loop is proposed. Moreover, the control algorithm of each layer is introduced. At last, the simulations of parking at stand still and double-lane-change maneuvering in several different adhesion conditions are performed. The simulation results show that the coordinating control system can ensure the DDAS system to work correctly and correct the bad influence of DDAS system on vehicle stability.