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18 December 2019 Analysis and experiment of random walk coefficient of high precision fiber optic gyroscope
Wenlong Zuo, Bohan Liu, Xin Chen, Shuyin Zhang
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Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 113401A (2019) https://doi.org/10.1117/12.2547774
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China
Abstract
The random walk coefficient of fiber optic gyroscope (FOG) is a kind of gyroscope output error accumulated over time by white noise. In order to achieve 100s bias stability of high precision FOG less than 0.0001 °/h, the random walk coefficient of FOG is less than 0.0000167 °/√ht. Based on the analysis of the factors affecting the random walk coefficient of FOG, a random walk coefficient model is established in this paper. Considering the characteristics of high precision FOG such as oversampling and low bandwidth, a method to reduce the random walk coefficient of high precision FOG is proposed. Through the theoretical analysis of the above methods, the feasibility of the method is proved theoretically. Furthermore, the comparative test of the precision of the high precision fiber optic gyroscope using the above method proves the feasibility of the above method. The random walk coefficient of the gyroscope is significantly reduced, which makes the bias stability of the high precision fiber optic gyroscope achieve the design goal.
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Wenlong Zuo, Bohan Liu, Xin Chen, and Shuyin Zhang "Analysis and experiment of random walk coefficient of high precision fiber optic gyroscope", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 113401A (18 December 2019); https://doi.org/10.1117/12.2547774
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KEYWORDS
Fiber optic gyroscopes
Signal to noise ratio
Light sources
Sensors
Gyroscopes
Photodetectors
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