Patent ID: 7908056

Claim:
A steer-by-wire system for automobiles, comprising: a steering control unit comprising a steering wheel; a steering feel generation motor mounted in the steering control unit; a central control unit for outputting a steering control signal, and a current control signal, which is applied to the steering feel generation motor, according to motion of the steering wheel; a steering mechanism unit comprising a rack motor for operating vehicle wheels in response to the steering control signal received from the central control unit; and a signal input unit comprising a vehicle velocity sensor, a steering angle sensor, a torque sensor, and a steering angular velocity sensor, and used to input a sensing signal, which is necessary for the central control unit to control the steering feel generation motor; wherein the central control unit receives a vehicle velocity signal, a steering angle signal, a steering torque signal and a steering angular velocity signal from the signal input unit, comprises a reaction force generation unit for generating steering reaction force or restoring force, acting in a reverse direction to that of a steering torque, and a damping force generation unit for generating damping force, acting in a reverse direction to the steering reaction force or the restoring force in an identical direction to the steering torque, and generates the current control signal, which is applied to the steering feel generation motor, by combining resulting values determined by the reaction force generation unit and the damping force generation unit.