Method and apparatus for controlling an electric assist steering

Details Method and apparatus for controlling an electric assist steering Method and apparatus for controlling an electric assist steering

1994-05-11

1995-12-05

Shoop, Jr., William M.

Electricity: motive power systems

Constant motor current, load and/or torque control

Control of motor load or device driven

318432, 180 791, H02K 1732

Patent

active

054732310

ABSTRACT:
A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A controller is connected to the vehicle speed sensor (56) and to the torque sensor (44). The controller includes an adaptive torque filter (80) that maintains a selectable system bandwidth independent of gain changes and vehicle speed changes. The adaptive filter (80) recovers any gain reduction by increasing the frequency of a filter pole.

REFERENCES:
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patent: 4951207 (1990-08-01), Furukawa et al.
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patent: 4989682 (1991-02-01), Takahashi et al.
patent: 4992944 (1991-02-01), Noto et al.
patent: 5053966 (1991-10-01), Takahashi et al.
patent: 5072804 (1991-12-01), Bischof et al.

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