Electrostatic pickoff and torquer

Details Electrostatic pickoff and torquer Electrostatic pickoff and torquer

1976-09-29

1978-04-04

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

340200, 324 61R, G05B 106

Patent

active

040829901

ABSTRACT:
An instrument which performs with precision either as a pickoff or torquer and which is not subject to geometrical errors due to the electrodes going out of round. The pickoff electrodes of the instrument are mounted adjacent the end of the movable element instead of being concentric to it. Because of the location of the pickoff electrodes relative to the movable element, the device is a variable area pickoff rather than a variable gap pickoff. This provides the advantages of obtaining outputs from the X and Y axes which are a linear function of the motion of the movable element and, therefore, the displacement angle, as determined by the ratio of X and Y outputs, is independent of the amplitude of motion.

REFERENCES:
patent: 3515987 (1970-06-01), Zurbrick et al.
patent: 3843924 (1974-10-01), Wahlgren
patent: 3873916 (1975-03-01), Sterki
patent: 3961318 (1976-06-01), Farrand et al.

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