Electricity: motive power systems – Positional servo systems – With compensating features
Patent
1992-08-05
1994-01-25
Ip, Paul
Electricity: motive power systems
Positional servo systems
With compensating features
318139, 318254, 3644241, 36442405, 74335, 74866, G01R 1702, B60K 4118
Patent
active
052819027
ABSTRACT:
A position-feedback-control servomechanism for shifting the transmission of a vehicle has both an adaptive proportional-integral-differential controller to compensate for manufacturing variations, etc, and a voltage-compensation system that senses the battery voltage and prevents the gain of a servomechanism drive motor from varying significantly when the battery voltage changes. The motor is preferably a permanent-magnet type to whose terminals the battery voltage is switched on and off. The switching is done by electronic switches that are under the control of a pulse-width-modulated signal. The width of the pulses of the pulse-width-modulated signal is controlled by both a closed-loop position-error signal and a signal derived from an open-loop measurement of the battery voltage.
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Edelen Stephen A.
Ong Chiau-Chieh
Eaton Corporation
Grace C. H.
Ip Paul
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