Follower device with differentiated speeds for gyrocompasses wit

Details Follower device with differentiated speeds for gyrocompasses wit Follower device with differentiated speeds for gyrocompasses wit

1978-12-28

1981-04-28

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318640, 74 56A, 74 57, 318654, B64C 1702

Patent

active

042648521

ABSTRACT:
A detector responsive to an angular offset between a gyrosphere of a gyrocompass and a tilt ring, forming part of a gimbal mounting therefor, controls a follower motor coupled through a reduction gearing with a suspension shaft for that mounting, the shaft being further coupled with a first synchro transmitter. A second synchro transmitter, electrically connected to several synchro receivers forming part of respective repeaters, is driven by a servomotor through a reduction gearing of step-down ratio 1:3 and is mechanically linked with a third synchro transmitter through a reduction gearing of step-down ratio 1:360, the third synchro transmitter being electrically connected to the first synchro transmitter for producing an error signal delivered through a feedback loop to the servomotor for keeping same slaved to the suspension shaft. The detector may comprise an optical sensor with a light source and two spaced-apart photoresistors mounted on the tilt ring and with a mirror on the gyrosphere reflecting light from the source onto the photoresistors which are connected in a bridge circuit so as to unbalance same in the event of an offset.

REFERENCES:
patent: 3259822 (1966-07-01), Burmeister et al.
patent: 3551905 (1970-12-01), Kuhne
patent: 3760170 (1973-09-01), Weber, Jr.
patent: 3784891 (1974-01-01), Burmeister
patent: 3875488 (1975-04-01), Crocker et al.

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