13 August 1998 High-precision three-axis closed-loop fiber optic gyroscope
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Abstract
The architecture and performance of single axis digital closed-loop FOG are first described. To achieve high precision and large dynamic range, the optic sensor of single unit uses a multifunction integrated optic chip (MIOC), and fiber used in FOG are polarization-preserving fiber. The signal detection scheme of single axis FOG is also analyzed. Based on single axis unit, three-axis FOG scheme is presented. The optic sensor of three-axis unit includes three MIOC, and the signal detection part is optimal designed. To meet the requirement of real-time processing, high speed digital signal processor is used as center processor. Finally, the test result of single-axis digital closed-loop FOG are presented. As the result shows, the bias drift of 0.1 is achieved.
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Chunxi Zhang, Nifang Song, Xinzhen Du, HongJie Xu, Weixu Zhang, "High-precision three-axis closed-loop fiber optic gyroscope", Proc. SPIE 3555, Optical and Fiber Optic Sensor Systems, (13 August 1998); doi: 10.1117/12.318176; https://doi.org/10.1117/12.318176
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