Voltage compensation of a pulse-width-modulated servomechanism

Details Voltage compensation of a pulse-width-modulated servomechanism Voltage compensation of a pulse-width-modulated servomechanism

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 63/00 (2006.01) F16H 61/32 (2006.01) F16H 59/68 (2006.01) F16H 59/70 (2006.01) F16H 61/00 (2006.01) F16H 61/12 (2006.01)

Patent

CA 2101714

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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