Control design of a steer-by-wire system with high performance PM motor drives

This paper deals with the control design of an advanced steer-by-wire system using high performance permanent magnet motor drives. The main aim of work is the design of a position control for the Road wheel Motor for an accurate steering angle control and a torque feedback control for the steering wheel motor for an effective steering feel. The position control has to be precise and stable at any load condition, which is very changeable with the steering angle, road conditions and vehicle velocity. The steering wheel motor has to give a reaction torque to the driver reflecting the impact of the vehicle on the road. Neither force nor torque transducer are used in the control scheme. Simulations, implementation details, and experimental results on a test bench are included in the paper.