Phase locked gyroscope wheel supply for synchronous...

Details Phase locked gyroscope wheel supply for synchronous... Phase locked gyroscope wheel supply for synchronous...

G - Physics

01

C

79/2

G01C 19/00 (2006.01) H02P 5/52 (2006.01)

Patent

CA 1152361

ABSTRACT Electrical and mechanical synchronization of two or more synchronously driven gyroscopes, mounted on the same plat- form, 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 predeter- mined relationship between a pick-off signal and the frequency generator. Phase-lock start-up of a single gyroscope by in- stantaneous shift of the phase of the driving voltage, relative to the gyroscope wheel position, is also provided.

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