Gyro control and monitor circuit

Details Gyro control and monitor circuit Gyro control and monitor circuit

1990-01-30

1990-10-30

Ro, Bentsu

Electricity: motive power systems

With signals, meters, recorders or testing devices

318565, 324177, 324158MG, H02K 1100

Patent

active

049671235

ABSTRACT:
An energizing and test circuit for a gyroscope spin motor which in addition o having a set of energizing coils, also includes a reference coil which generates a sinusoidal voltage whose frequency is a function of speed of rotation of the spin rotor. This signal is fed to a precision tachometer circuit whose output is compared with a desired speed signal for generating a voltage required to maintain a proper spin rate and comprises what is referred to as a "sustain" voltage. The sustain voltage is buffered and coupled to an external test point which can be monitored to determine the functional integrity of the gyro and more particularly the quality of its motor bearings. This sustain voltage is also coupled to drive amplifier circuit means which power the head coil assembly including drive windings of the spin motor. Circuitry is also provided for performing an automated spin-up and spin-down test.

REFERENCES:
patent: 3146433 (1964-08-01), Hurlburt
patent: 3282081 (1966-11-01), Boskovich
patent: 3657918 (1972-04-01), Hurlburt
patent: 3790874 (1974-02-01), Klimo
patent: 3851324 (1974-11-01), De Boer et al.
patent: 3942111 (1976-03-01), Pfouts
patent: 4275342 (1981-06-01), Kawada et al.
patent: 4340847 (1982-07-01), Izumi
patent: 4422040 (1983-12-01), Raider et al.
patent: 4616179 (1986-10-01), Braun

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