An Estimation Steering Feedback Torque in Vehicle Steer by Wire System

A steering feedback torque in conventional steering system is generated between a tire and ground contact. This steering torque is for a driver steering feel in parallel confident level during maneuver. In steering by wire (SBW) system, the absence of the column shaft requires the system to generate the torque and should equal to conventional steering system for a realistic driver steering feel. This paper propose an algorithm to create an estimation steering feedback torque control for vehicle SBW system. The estimation torque consists of a steering and front axle model. While by adding a phase compensation torque, driver will have realistic steering feel. Moreover, to control the torque, the LQR + GS control method is used. To investigate the effectiveness of proposed control algorithm, the MATLAB tools software is used to analyze the response. Based on the finding results, the proposed algorithm is able to create estimation feedback torque, and the phase compensation torque provides a realistic driver steering feel.