Vehicle Steering-by-Wire System´s Handling Stability Research Based on Sliding Mode Control Theory

The vehicle model and the tire model are established through the vehicle system dynamic equation in this paper, and with the assumption that the yaw rate gain is constant, the steering model is developed via the ideal ratio for the steer-by wire (SBW) system. An adaptive sliding mode controller is designed Based on the theory of sliding mode control. The controller input is defined as the weighted combination of yaw rate and sideslip angle errors, and the desired front wheel angle is calculated as the output. The simulation results show that the adaptive sliding mode controller can improve the handling stability for SBW system.