Random noise study of the digital closed-loop fiber optic gyroscope

Hong Gu; Shuhong Li; Fuzhong Wang; Haiming Zhang

doi:10.1117/12.2030303

29 August 2013 Random noise study of the digital closed-loop fiber optic gyroscope

Hong Gu, Shuhong Li, Fuzhong Wang, Haiming Zhang

Proceedings Volume 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography; 891402 (2013) https://doi.org/10.1117/12.2030303
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

The random noise of the fiber optic gyroscope(FOG) is not only concerned with the noise of the optical path in system, but also concerned with a various of noise in the modulation and demodulation circuit. The characteristics of the shot noise, thermal noise of the detector and the relative intensity noise of light source were analyzed. The random noise model was established by use of the closed-loop transfer function. The relationship between the fiber optic gyro random walk coefficient (RWC) and these noises was analyzed. According to the theoretical results, some parameters of the gyro were adjusted, and the performance of the gyro was optimized. The theoretical results were compared with the experimental data analyzed by Allan variance, the random walk coefficient model was proved correct.

Citation Download Citation

Hong Gu, Shuhong Li, Fuzhong Wang, and Haiming Zhang "Random noise study of the digital closed-loop fiber optic gyroscope", Proc. SPIE 8914, International Symposium on Photoelectronic Detection and Imaging 2013: Fiber Optic Sensors and Optical Coherence Tomography, 891402 (29 August 2013); https://doi.org/10.1117/12.2030303

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