Materials, Photonic Devices, and Sensors

Compensation of scale factor nonlinearity in resonator fiber optic gyro

[+] Author Affiliations
Yinzhou Zhi

Beihang University, Science and Technology on Inertial Laboratory, Beijing 100191, China

Beihang University, Precision Opto-mechatronics Technology Key Laboratory of Education Ministry, Beijing 100191, China

Lishuang Feng

Beihang University, Science and Technology on Inertial Laboratory, Beijing 100191, China

Beihang University, Precision Opto-mechatronics Technology Key Laboratory of Education Ministry, Beijing 100191, China

Junjie Wang

Beihang University, Science and Technology on Inertial Laboratory, Beijing 100191, China

Beihang University, Precision Opto-mechatronics Technology Key Laboratory of Education Ministry, Beijing 100191, China

Yichuang Tang

Beihang University, Science and Technology on Inertial Laboratory, Beijing 100191, China

Beihang University, Precision Opto-mechatronics Technology Key Laboratory of Education Ministry, Beijing 100191, China

Opt. Eng. 53(12), 127108 (Dec 23, 2014). doi:10.1117/1.OE.53.12.127108
History: Received July 9, 2014; Accepted November 26, 2014
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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 ±82deg/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 ±100deg/s.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Yinzhou Zhi ; Lishuang Feng ; Junjie Wang and Yichuang Tang
"Compensation of scale factor nonlinearity in resonator fiber optic gyro", Opt. Eng. 53(12), 127108 (Dec 23, 2014). ; http://dx.doi.org/10.1117/1.OE.53.12.127108


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