Laser gyro screening method for predicting angular random walk

Details Laser gyro screening method for predicting angular random walk Laser gyro screening method for predicting angular random walk

1993-11-30

1995-07-18

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1966

Patent

active

054346703

ABSTRACT:
A screening method for a ring laser gyro capable of more accurately predicting the gyro's angular random walk upon completion of the built process is disclosed. A strong correlation exists between the angular random walk and a scale factor pulling term. Scale factor pulling is equivalent to the scale factor deviation measured at two rotational rates plus a positive scale factor correction term and is indicative of the effect of lockin on the scale factor. This screening method allows the removal of high ARW units from the production line at a point early on in their processing. By removing these gyros at this point in processing, unnecessary production steps and unnecessary value added operations are eliminated.

REFERENCES:
patent: 4844615 (1989-07-01), Benoist

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