Accurate model and compensation method of scale error of HPFOG

Xiaoming Zhang; Bohan Liu; Chao Song; Wenlong Zuo

doi:10.1117/12.2580249

5 November 2020 Accurate model and compensation method of scale error of HPFOG

Xiaoming Zhang, Bohan Liu, Chao Song, Wenlong Zuo

Proceedings Volume 11569, AOPC 2020: Optical Information and Network; 115690N (2020) https://doi.org/10.1117/12.2580249
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

Compared with laser gyro, the scale factor performance of high-precision FOG(HPFOG) restricts its application to high-precision and strategic applications. According to the characteristics of HPFOG with well temperature sensitivity and poor nonlinearity, In this paper, the temperature error model of fiber optic loop and the scale factor error output curve of gyro at different angular rates of each temperature point are analyzed. An optical fiber temperature sensor embedded in the optical fiber loop is proposed to accurately measure the temperature of the optical fiber loop. Compared with the existing single point or multi-point external temperature model, the model can accurately measure the internal temperature field of the optical fiber loop, and establish a reliable Shupe error model of the optical fiber loop temperature. A hybrid model is established by introducing the input angular rate information of gyroscope into the model, and the multi coefficient scale error is compensated according to the model. The experimental results show that the scale factor of HPFOG is greatly improved after compensation based on the accurate error model, and the performance index of the scale factor of HPFOG is effectively improved.

Citation Download Citation

Xiaoming Zhang, Bohan Liu, Chao Song, and Wenlong Zuo "Accurate model and compensation method of scale error of HPFOG", Proc. SPIE 11569, AOPC 2020: Optical Information and Network, 115690N (5 November 2020); https://doi.org/10.1117/12.2580249

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