Motor driven damping arrangement and method

Details Motor driven damping arrangement and method Motor driven damping arrangement and method

1992-05-08

1994-03-22

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

318696, 318460, G05B 1101

Patent

active

052967905

ABSTRACT:
An arrangement involving apparatus and process damps vibrations, for example, rotary or linear vibrations, in a member to be damped, for example, in a supply tension arm forming part of a tape transport of a digital cassette recording system. The arrangement includes a limited angle torquer motor having an output connected to the member such that the presence of the detected vibrations to be damped imparts corresponding vibrations to the shaft (output) of the motor which, in turn, results in a corresponding back EMF voltage within the motor. A servo circuit connected to the input of the motor is designed to be responsive to the back EMF voltage within the motor, actually to an emulated version of the back EMF voltage, for driving the motor in a way to thereby damp the vibrations within the motor shaft which, in turn, damps the rotary or linear vibrations within the member itself. Approximately 20dBs of attenuation in vibration at the resonant frequency has been shown.

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English version of Chinese (Taiwan) Appln. No. 79,107,532 entitled Feedback Control System.

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