STEER BY WIRE MOTOR CONTROL ALGORITHM

摘要

A steer by wire system for a vehicle that employs a steering torque assist to allow the vehicle operator to more easily steer the vehicle in the event of a steer by wire system fault. The steer by wire system includes a sensor that generates a signal indicative of the position of and torque applied to the steering wheel that is received by a controller. From the position signal, the controller controls the steering of the vehicle by a steering motor. A feedback motor provides counter-torque to the rotation of the steering wheel to simulate the turning of the vehicle wheels. If the steer by wire system fails, a clutch engages a mechanical linkage to allow the vehicle operator to control the vehicle steering by the steering wheel. The controller provides a motor drive signal to the feedback motor to provide the torque assist when the mechanical linkage is engaged.