Patent ID: 6612392
Filing Date: 2003-09-02
Classification: B62D

Abstract:
A steer-by-wire system using a semi-active actuator, in which a wheel steering motor operates vehicle wheels when a steering wheel is rotated, said system comprising:a steering operator unit having a steering column with one end vertically connected to a center of the steering wheel, a torsion spring connected between another end of said steering column and a vehicle body via jigs mounted to both ends thereof, a magneto-rheological brake for providing steering reaction force according to an amount of current, a rotation angle sensor coupled with one end of said steering column for detecting rotation of said steering wheel, and a torque sensor coupled with one end of said steering column for detecting torque of said steering wheel; a current regulator for controlling resistance force against rotation of said magneto-rheological brake; and a controller for controlling said current regulator according to torque data from said torque sensor, and controlling the wheel steering motor according to rotational displacement data from said rotation angle sensor.