Research on Steering Control Strategy for Steering-by-Wire Four-Wheel Electric Vehicle

A38 to track ideal value of sideslip angle and yaw rate for the four-wheel electric vehicle steering system, the fuzzy controller based on combined feedback of yaw rate and sideslip angle is designed by using the two-degree-of-freedom (2DOF) model of four-wheel steer-by-wire system in this paper to improve the handling stability of electric vehicle. According to the actual data of the electric vehicle, the response curves of conventional front wheel steering control, proportional control and combined feedback fuzzy control are compared in different load conditions under Matlab/Simulink. The simulation results demonstrate that the combined feedback fuzzy control can track yaw angle and reduce the sideslip angle effectively, and it improves the flexibility and steering stability of the electric vehicle at the same time.