Fixed interval background auto-alignment for closed loop interfe

Details Fixed interval background auto-alignment for closed loop interfe Fixed interval background auto-alignment for closed loop interfe

1997-12-31

1999-09-14

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

059531231

ABSTRACT:
This invention relates to an improved method and mechanism by which to align closed loop interferometric fiber optic gyroscopes. Such method and means includes aligning the gyroscope periodically at fixed time intervals; providing multiplexed control of the gyroscope's internal phase rebalance control loop and gain scaling control loop, enabling one or the other, but never both simultaneously, and thereby eliminate acceleration-dependent errors; eliminating the 1 LSB phase discontinuity produced during each roll-over in the gyroscope by adding an offset to the output ramp produced by said serrodyne ramp generator; and providing a means and method to align the phase-rebalance loop gain for each production unit.

REFERENCES:
patent: 4948252 (1990-08-01), Cekorich
patent: 5351123 (1994-09-01), Spahlinger

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