CONTROL DEVICE FOR STEERING TRANSMISSION RATIO VARIABLE DEVICE

摘要

A device (100) for controlling a steering transmission ratio variable device (200), which is provided with: a motor (202), which is able to apply a driving force that promotes relative rotation between a steering output shaft (15) coupled to wheels to be turned and a steering input shaft (12) that applies a steering input to the steering output shaft (15) to one of either the steering output shaft (15) or the steering input shaft (12); a motor driving device (300) that drives the motor; and a locking device (203) that is able to restrict the relative rotation, has a setting device that prescribes a drive voltage (V) of the motor and sets a damping gain (D2), which acts in a direction that reduces a rotating speed (?'act) of the motor, to a value (D2lock) that is larger than a reference value (D2base) corresponding to an unlocked state during a locking control period in which a state of the steering transmission ratio variable device switches from an unlocked state in which the relative rotation is not restricted to a locked state in which the relative rotation is restricted.