Ring laser gyroscope dither drive circuit

Details Ring laser gyroscope dither drive circuit Ring laser gyroscope dither drive circuit

1979-08-31

1981-07-07

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

042771730

ABSTRACT:
A method and apparatus for phase locking the dither motions of a set of ring laser gyroscopes are shown. To prevent a variation of force from existing on a strapped-down sensor block having a plurality of ring laser gyroscopes means are provided permitting only one gyroscope to determine the frequency of oscillation of its dither suspension system. The remaining gyroscopes are slaved in both frequency and phase to the reference rather than acting independently, or locked in frequency only. The circuitry for the master and slave units have similar components, and operate substantially the same except that the signal from the variable frequency oscillator of the master unit is used as the second input to the phase detectors of the slave units rather than them using the output of their own variable frequency oscillators.

REFERENCES:
patent: 4132482 (1979-01-01), Friedland

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