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Optical Engineering

Compensation of scale factor nonlinearity in resonator fiber optic gyro
Author(s): Yinzhou Zhi; Lishuang Feng; Junjie Wang; Yichuang Tang
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Paper Abstract

Scale factor nonlinearity (SFN) and dynamic range (DR) are the two significant parameters used to evaluate the performance of a resonator fiber optic gyro (RFOG). The inherent SFN of an open-loop RFOG with triangular phase modulation is first analyzed theoretically, and its relationship with the DR is simulated, showing that the DR is significantly constrained by the SFN. For our system, when the SFN is 1%, the DR is less than ±82  deg/s. To decrease the SFN in a certain DR, a real-time compensation method based on a field-programmable gate array is proposed. The compensation model is set up and the compensation scheme is illustrated. With the proposed method, the SFN of the RFOG is decreased from 1.53% to 0.057% with a DR of ±100  deg/s.

Paper Details

Date Published: 23 December 2014
PDF: 7 pages
Opt. Eng. 53(12) 127108 doi: 10.1117/1.OE.53.12.127108
Published in: Optical Engineering Volume 53, Issue 12
Show Author Affiliations
Yinzhou Zhi, BeiHang Univ. (China)
Lishuang Feng, BeiHang Univ. (China)
Junjie Wang, BeiHang Univ. (China)
Yichuang Tang, BeiHang Univ. (China)

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