The present invention involves a method for initial synchronization of
steering wheel and a road wheels in a steer-by-wire system of a vehicle
when the system is first powered. The method includes providing a steering
wheel control system and a road wheel control system. The method further
includes sensing relative angles and the absolute angles of the steering
wheel, road wheel, and right road wheel. The method further includes
generating an augmented steering wheel angle, an augmented left road wheel
angle, and an augmented right road wheel angle based on the relative angle
and initial value of the absolute angles of the steering wheel and road
wheels. The method further includes using the augmented steering wheel
angle as a feedback signal to the steering wheel control system and the
augmented left and right road wheel angles feedback signals to the road
wheels control system. The method further includes controlling the
steering wheel and the road wheels to perform initial synchronization of
the steering wheel and the road wheels, thereby allowing the vehicle to be
operable during the initial synchronization.
