Controller for power steering apparatus

Details Controller for power steering apparatus Controller for power steering apparatus

1994-03-11

1995-11-14

Teska, Kevin J.

Boots, shoes, and leggings

180 791, 180142, B62D 504, B62D 506

Patent

active

054672813

ABSTRACT:
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.

REFERENCES:
patent: 4714988 (1987-12-01), Hiroi et al.
patent: 4842089 (1989-06-01), Kimbrough et al.
patent: 4878557 (1989-11-01), Shibahata et al.
patent: 4885676 (1989-12-01), Zweighaft
patent: 4912753 (1990-03-01), Evans, Jr.
patent: 4971173 (1990-11-01), Takahashi
patent: 5248921 (1993-09-01), Kato et al.
patent: 5251124 (1993-10-01), Matsunaga

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