Title :
Phase modulation control for an interferometric fiber optic gyroscope
Author :
LaViolette, Kerry D. ; Bossler, Franklin B.
Author_Institution :
Bell Aerosp. Textron, Buffalo, NY, USA
Abstract :
A FOG (fiber-optic gyroscope) scale factor control has been developed by implementing a second-phase modulation producing an error function. This error function is used to drive the first original modulation depth, forcing J0(M) to zero. A reduction factor of 100 in scale factor error is accomplished with a 0.1% loss in the SNR (signal-to-noise ratio) of the rate signal. The implementation of this control loop can be applied in a straightforward manner to a phase-modulated FOG. Therefore, an open-loop FOG can be used for more stringent applications such as attitude and reference
Keywords :
aerospace control; fibre optic sensors; gyroscopes; light interferometry; phase modulation; stability; SNR; attitude; control loop; error function; interferometric fiber optic gyroscope; modulation depth; reference; scale factor control; second-phase modulation; Equations; Error correction; Gyroscopes; Open loop systems; Optical control; Optical fibers; Optical interferometry; Phase detection; Phase modulation; Sagnac interferometers;
Conference_Titel :
Position Location and Navigation Symposium, 1990. Record. The 1990's - A Decade of Excellence in the Navigation Sciences. IEEE PLANS '90., IEEE
Conference_Location :
Las Vegas, NV
DOI :
10.1109/PLANS.1990.66152
