Patent ID: 8406958
Filing Date: 2013-03-26
Classification: B62D

Abstract:
1. A wheel alignment apparatus using a motor-driven power steering (MDPS) comprising: a request value generation unit configured to generate a request profile for center alignment according to a steering angle inputted from a steering angle sensor, when an activation command for center alignment of a wheel is inputted; a compensation value generation unit configured to generate a compensation profile based on values inputted through the steering angle sensor, a motor angular velocity sensor, and a motor current sensor; a steering position control unit configured to calculate a target steering angular velocity through the steering angle inputted from the steering angle sensor and a target profile obtained by adding up the request profile generated by the request value generation unit and the compensation profile generated by the compensation value generation unit, and convert the target steering angular velocity into a motor angular velocity; a motor angular velocity control unit configured to generate a driving current for driving the MDPS motor through the motor angular velocity inputted from the steering position control unit and a motor angular velocity inputted from the motor angular velocity sensor; a motor current control unit configured to compare the driving current generated by the motor angular velocity control unit to the motor current measured by the motor current sensor and drive the MDPS motor; and a switching unit configured to selectively switch the driving current generated by the motor angular velocity control unit and the driving current outputted from the MDPS torque control unit of the MDPS to the motor current control unit.