METHOD AND APPARATUS FOR CONTROLLING STEERING FORCE
Disclosed is a method and an apparatus for controlling steering force, by which every driver can feel a steering sense that the driver wants. In the method, a torque signal is compensated for by using a compensation value input by a driver, and the steering force is controlled using the compensated torque signal, so as to provide every driver with a satisfactory steering sense and a convenience in handling the steering wheel.
1 . An apparatus for controlling a steering force, the apparatus comprising:
a compensation value input unit for receiving a compensation value for compensation of a torque signal through a driver interface;
a torque signal input unit for receiving a torque signal from a torque sensor;
a torque signal compensation unit for generating a compensation torque signal by compensating for the torque signal based on the compensation value; and
a steering force control unit for controlling the steering force based on the compensation torque signal.
2 . The apparatus of claim 1 , wherein the compensation value input unit receives an input of the compensation value, which has a plus sign or a minus sign, according to user setting through the driver interface.
3 . The apparatus of claim 1 , wherein the compensation value input unit determines if the input compensation value is within a preset compensation value setup safety range, and performs a control of determining whether to compensate for the torque signal, based on a result of the determination.
4 . The apparatus of claim 3 , wherein:
when the input compensation value is within a compensation value setup safety range, the compensation value input unit transfers a command signal indicating that the compensation for the torque signal is possible or the input compensation value to the torque signal compensation unit, so that the torque signal is compensated for; and
when the input compensation value is not within a compensation value setup safety range, the compensation value input unit transfers a command signal indicating that the compensation for the torque signal is impossible to the torque signal compensation unit or prevents transmission of the input compensation value to the torque signal compensation unit, so that the torque signal is not compensated for.
5 . The apparatus of claim 4 , wherein:
before receiving the compensation value, the compensation value input unit outputs information on a preset compensation value setup safety range through the driver interface, so as to guide the setup of the compensation value; and
after receiving the compensation value, the compensation value input unit outputs compensation value resetting notification information through the driver interface, when the input compensation value is not within a compensation value setup safety range.
6 . The apparatus of claim 1 , wherein the compensation value input unit outputs multiple stage compensation values, which have been verified based on the safety of the compensation value and preset according to the sense of weight of the steering wheel, through the driver interface, and receives a compensation value selected from the multiple stage compensation values.
7 . The apparatus of claim 1 , wherein the torque signal compensation unit acquires a variance torque signal by multiplying the input torque signal by the compensation value, and then generates a compensation torque signal by adding the input torque signal and the acquired variance torque signal.
8 . The apparatus of claim 1 , wherein the steering force control unit performs a steering force control, which assists the steering force through control of a magnitude of an assisting steering force, such that a maximum current supplied by the compensation torque signal becomes equal to a maximum current supplied by the torque signal before the compensation.
9 . A method of controlling a steering force, the method comprising:
receiving a compensation value for compensation of a torque signal through a driver interface;
receiving a torque signal from a torque sensor;
generating a compensation torque signal by compensating for the torque signal based on the compensation value; and
controlling the steering force based on the compensation torque signal.