An Apparatus for Demodulating Gyroscope Position Information.
DEPARTMENT OF THE ARMY WASHINGTON DC
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A synchronous demodulator is configured so as to extract gyroscope position information in a polar coordinate format and then resolve it into position information in a more useful cartesian coordinate format. The technique involves integrations of a gyroscope cage coil signal over integration intervals controlled noisy cage coil signal. Integration of the cage coil signal over intervals controlled by the spin reference signals yields outputs of lambda cos theta and lambda sin theta which are subsequently sampled and held and then summed to produce a precession coil drive signal whose phase is in the proper relationship to make the gyroscope precess in the correct direction,
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