Method and system for correcting random walk errors induced...

Details Method and system for correcting random walk errors induced... Method and system for correcting random walk errors induced...

G - Physics

01

C

345/10

G01C 19/66 (2006.01) G01C 19/70 (2006.01)

Patent

CA 1290433

METHOD AND SYSTEM FOR CORECTING RANDOM WALK ERRORS INDUCED BY RATE REVERSALS IN A DITHERED RING LASER GYROSCOPE ABSTRACT OF DISCLOSURE A correction to the output angle of a ring laser gyroscope is calculated as a function of the phase difference and the magnitude of coupling between the two counterpropagating beams when the dither oscillations change direction. A pair of heterodyne detectors produce heterodyne signals indicative of the interference pattern between the counterpropagating beams. A signal indicative of the sum of the separate beam intensities is demodulated with the heterodyne signals to determine the magnitude of coupling between the beams in the ring laser gyroscope.

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