Rate control loop for fiber optic gyroscope

Details Rate control loop for fiber optic gyroscope Rate control loop for fiber optic gyroscope

1997-07-15

1999-03-16

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

058837167

ABSTRACT:
A closed-loop system for regulating a fiber optic gyroscope is configured so that the residual error of a so-called deadbeat system assumes a higher order function of frequency. The closed-loop gyro includes a rate controller within the feedback path. The rate controller receives the gyro output from the last loop transit corrected for d.c. offset and for nominal dither and outputs a gyro rate estimate. The rate controller includes a plurality of feedback integrators in cascaded relationship. In this way, the residual gyro error associated with inherent loop delay is elevated to a higher-order relationship to sensed gyro rate. As a result, a substantial reduction in residual error as a function of sensed gyro rate occurs throughout the range of operational gyro frequencies.

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