Laser gyro dither strippr gain correction method and apparatus

Details Laser gyro dither strippr gain correction method and apparatus Laser gyro dither strippr gain correction method and apparatus

1993-10-01

1996-01-23

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1966

Patent

active

054869200

ABSTRACT:
A sampling method and apparatus for sampling a dither signal includes the step of sensing a number of peak amplitudes P.sub.1, P.sub.2, P.sub.3 . . . P.sub.n each of the number of peak amplitudes having a corresponding times t.sub.1, t.sub.2, t.sub.3 . . . t.sub.n while simultaneously sensing a number of ring laser gyro output angles at each of the corresponding times t.sub.1, t.sub.2, t.sub.3 . . . t.sub.n. A value of the gyro net output, .DELTA..phi., is calculated as .DELTA..phi.=(.phi..sub.n -.phi..sub.n-1)-(.alpha..sub.n -.alpha..sub.n-1)K, where K is a correction factor. Alternatively, the stripped gyro angle output may be calculated as .phi..sub.g =.phi..sub.n -.alpha..sub.n K. Where .phi..sub.g is substantially equivalent to the sum of all of the changes in the stripped gyro angle, that is the sum of all .DELTA..phi.'s. The correction may include corrections for gain, phase angle, nonlinearity, temperature bias and scale factors.

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patent: 5225889 (1993-07-01), Fritze et al.
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