RLG dither noise injection by means of reference modulation

Details RLG dither noise injection by means of reference modulation RLG dither noise injection by means of reference modulation

1993-11-30

1998-06-30

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1970

Patent

active

057742162

ABSTRACT:
To reduce the accumulative lock-in effects of the ring laser gyroscope, the dither circuitry is provided with low frequency dither amplitude modulation. Such modulation is achieved by first developing a pair of complementary low frequency dither noise signals. These low frequency dither noise signals are then utilized by a modulator to modulate the dither drive signal in conjunction with the low frequency dither noise signals. This results in a system which allows much more dither amplitude modulation with much less output from the drive amplifiers. Because of the ability to increase amplitude modulation, gyro performance is greatly improved.

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