TORQUE-BASED DIRECTIONAL CONTROL IN STEER-BY-WIRE STEERING SYSTEMS

摘要

A vehicle steering control method includes receiving a sensed handwheel angle corresponding to a position of a handwheel and receiving a sensed handwheel toque value indicating an amount of torque applied by an operator on the handwheel. The method also includes, in response to a determination that the handwheel motor is in an unlocked condition, generating a roadwheel angle based on the sensed handwheel angle and a vehicle speed. The method also includes, in response to a determination that the handwheel motor is in a locked condition generating the roadwheel angle based on the sensed handwheel torque value and the vehicle speed and, in response to a determination that the locked condition of the handwheel motor is an intermittent condition, maintaining the handwheel motor in the locked condition.