Phase locked gyroscope wheel supply for synchronous hysteresis m

Details Phase locked gyroscope wheel supply for synchronous hysteresis m Phase locked gyroscope wheel supply for synchronous hysteresis m

1980-06-30

1982-10-19

Bonck, Rodney H.

Machine element or mechanism

Gyroscopes

Multiple gyroscopes

74 57, G01C 1910

Patent

active

043543936

ABSTRACT:
Electrical and mechanical synchronization of two or more synchronously driven gyroscopes, mounted on the same platform, to minimize cross-talk induced drift, is achieved by bringing one gyroscope to a speed which is slightly higher than the other by driving it at a slightly higher frequency. At speed, coincidence of mechanical position is established by means of signals from pick-offs on each gyro and the drive for the faster gyroscope is shifted to the lower frequency. Electrical synchronism is established by restarting the lower frequency generator to instantaneously establish a predetermined relationship between a pick-off signal and the frequency generator. Phase-lock start-up of a single gyroscope by instantaneous shift of the phase of the driving voltage, relative to the gyroscope wheel position, is also provided.

REFERENCES:
patent: 3694716 (1972-09-01), Eland
patent: 4257280 (1981-03-01), Coles et al.
patent: 4258579 (1981-03-01), Olbrechts
patent: 4274291 (1981-06-01), Schroeder

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