ELECTRIC STEERING SYSTEM WITH SEMIACTIVE ACTUATOR

摘要

PURPOSE: An electric steering system by using a semiactive actuator is provided to improve steering stability by applying reaction force to a steering wheel according to information on the vehicle with a damper. CONSTITUTION: An electric steering system is composed of a steering operation unit, a current adjuster(80) controlling rotation resistance of a damper(30), and a controller(90) controlling the current adjuster according to torque from a torque sensor(40) and a wheel steering motor(110) according to rotation from a rotational angle sensor(50). The steering operation unit consists of a steering shaft(20) vertically connected to a steering wheel(10), a torsion spring(70) connected between the steering shaft and the vehicle body through a jig(60), the damper supplying steering reaction force according to current, the rotational angle sensor detecting rotation of the steering wheel, and the torque sensor engaged with the steering shaft to detect torque of the steering wheel. Steering stability is improved with applying reaction force to the steering wheel by the damper.