Oblon, Spivak, McClelland, Maier, & Neustadt
Controller for power steering apparatus
 A controller for a power steering apparatus in which operation fluid for generating assist torque is pumped by a motor-driven pump. The controller controls the flow rate of the operation fluid by changing the voltage supplied to the motor. The controller is provided with a section for generating a target value representing a target voltage to be supplied to the motor, a section for detecting the voltage actuary supplied to the motor, and a section for generating a voltage compensation value based on the detected voltage. The voltage compensation value is obtained by integrating a voltage difference between the target voltage and the detected voltage. The voltage compensation value is added to the target value to obtain a compensated target value. The motor is driven by a voltage corresponding to the compensated target value. In another type of controller, a voltage following rate indicating a target variation in voltage is increased to increase the voltage supplied to the motor only when the voltage difference increases. With this, responsiveness can be increased without causing overshoots. 
Toyoda Koki Kabushiki Kaisha
G B
G05B B62D
inventional inventional
Shigeo Akihiro Takashi
Iwashita Ohno Shirai