Apparatus for compensating for change in laser gyro dither picko

Details Apparatus for compensating for change in laser gyro dither picko Apparatus for compensating for change in laser gyro dither picko

1990-05-04

1994-06-28

Buczinski, Stephen C.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01B 902, H01S 3083

Patent

active

053251733

ABSTRACT:
A dithered ring laser gyroscope is mounted upon a support, and a pickoff is positioned between the gyro and the support to produce signals representative of rotation angle between the support and the gyro. A correction means is used to subtract out the effect of the dither from the output signal to the gyro. The correction means includes feedback means in the correction-producing apparatus. That feedback means includes tracking compensation for both gain and phase variation of the pickoff and pickoff electronics. To prevent constant or slowly varying signals from affecting the operation of the apparatus, the invention uses a differentiator or a high pass filter between the compensated output signal and the feedback loops.

REFERENCES:
patent: 4795259 (1989-01-01), Egli et al.
patent: 4981359 (1991-01-01), Tazartes et al.

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