Method for controlling a steer-by-wire steering system of a road vehicle with feedback actuator position calibration

A method for calibrating a position of a feedback actuator of a steer-by-wire steering system of a road vehicle, the method comprising:

• moving the feedback actuator to a first mechanical end stop of the feedback actuator and from there moving the feedback actuator to a second mechanical end stop;
• recording a position of the first and second mechanical end stops and based thereon determining a newly defined center position;
• moving the feedback actuator to the newly defined center position;
• and
• storing the newly defined center position in a memory as an offset value of an absolute steering wheel angle;
• wherein
• the steer-by-wire steering system includes a steering wheel, a road wheel actuator to actuate road wheels, and the feedback actuator;
• the feedback actuator applies a feedback torque to the steering wheel;
• and
• the positions of the first and second mechanical end stops are updated during operation of the feedback actuator if an actual position of the feedback actuator is at a steering wheel angle greater than a stored position.