Method for stabilizing the phase modulator transfer function in

Details Method for stabilizing the phase modulator transfer function in Method for stabilizing the phase modulator transfer function in

1997-12-31

1999-06-22

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

059147814

ABSTRACT:
This invention relates to an improved method and mechanism for eliminating acceleration-dependent errors and loop interaction effects in gain-stabilized, closed-loop, interferometric fiber optic gyroscopes. Such method and mechanism include enabling the modulation gain accumulator and disabling the rate accumulator on every occurrence of ramp flyback if the gyroscope is operating below a certain velocity threshold and enabling the modulation gain accumulator and disabling the rate accumulator on one out of every N occurrences of ramp flyback if the gyroscope is operating above a certain velocity threshold. Such method and mechanism also includes use of proportional circuitry to scale the magnitude of the bias modulation component to be a percentage of the serrodyne ramp voltage and the DC component to be zero volts.

REFERENCES:
patent: 4998822 (1991-03-01), Steele

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