Phase modulation control for an interferometric fiber optic gyroscope

Author

LaViolette, Kerry D. ; Bossler, Franklin B.

Author_Institution

Bell Aerosp. Textron, Buffalo, NY, USA

fYear

1990

fDate

20-23 Mar 1990

Firstpage

29

Lastpage

30

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PLANS.1990.66152

Filename

66152