Low Q body-dithered laser gyro assembly

Details Low Q body-dithered laser gyro assembly Low Q body-dithered laser gyro assembly

1983-05-20

1987-03-31

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

046539182

ABSTRACT:
A low Q ring laser gyro-dither motor assembly which is responsive to a wide range of frequency components of a drive signal having a randomly varying frequency such that the dither imparted to the gyro is frequency modulated by the drive. The frequency modulated dither varies the lock-in rate of the gyro as a function of the random drive signal to eliminate errors in the gyro output due to lock-in. The drive signal may be random in frequency only or random in both frequency and amplitude to provide the frequency modulation. Fixed frequency modulation may also be employed. The low Q assembly need not be driven at the natural frequency thereof so that a common drive circuit may be employed for a plurality of low Q gyro-dither motor assemblies forming an instrument cluster.

REFERENCES:
Scale Factor Non-Linearity of a Body Dither Laser Gyro, T. J. Hutchings and D. C. Stjern, 1978.

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