Journal of Systems Engineering and Electronics ›› 2025, Vol. 36 ›› Issue (2): 510-522.doi: 10.23919/JSEE.2025.000023

• CONTROL THEORY AND APPLICATION • Previous Articles    

Temperature error compensation method for fiber optic gyroscope based on a composite model of k-means, support vector regression and particle swarm optimization

Yin CAO1,*(), Lijing LI1(), Sheng LIANG2()   

  1. 1 School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
    2 Key Laboratory of Education Ministry on Luminescence and Optical Information Technology, National Physical Experiment Teaching Demonstration Center, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2024-02-26 Accepted:2025-02-21 Online:2025-04-18 Published:2025-05-20
  • Contact: Yin CAO E-mail:yinc0901@buaa.edu.cn;lilijing@buaa.edu.cn;shliang@bjtu.edu.cn
  • About author:
    CAO Yin was born in 1998. She received her M.S. degree in optical engineering from the School of Physical Science and Engineering, Beijing Jiaotong University, Beijing, China, in 2023. She is pursuing her Ph.D. degree in optical engineering at Beihang University, Beijing, China. Her research interests mainly focuses on artificial-intelligence based photoelectric detection. E-mail: yinc0901@buaa.edu.cn

    LI Lijing was born in 1974. He received his Ph.D. degree from Tianjin University, Tianjin, China, in 2002. He is currently a professor with the School of Instrumentation and Opto-electronic Engineering, Beihang University, Beijing, China. His research interests include missile guidance and control, photoelectric detection imaging, and fiber sensing. E-mail: lilijing@buaa.edu.cn

    LIANG Sheng was born in 1981. He received his Ph.D. degree in precision instrument and machinery from Beihang University, Beijing, China, in 2011. He is a professor with the Department of Physics, School of Science, Beijing Jiaotong University, Beijing, China. His research interest are intelligent photonics including artificial intelligence based fiber-optic sensors, and micro-struct. E-mail: shliang@bjtu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (62375013).

Abstract:

As the core component of inertial navigation systems, fiber optic gyroscope (FOG), with technical advantages such as low power consumption, long lifespan, fast startup speed, and flexible structural design, are widely used in aerospace, unmanned driving, and other fields. However, due to the temperature sensitivity of optical devices, the influence of environmental temperature causes errors in FOG, thereby greatly limiting their output accuracy. This work researches on machine-learning based temperature error compensation techniques for FOG. Specifically, it focuses on compensating for the bias errors generated in the fiber ring due to the Shupe effect. This work proposes a composite model based on k-means clustering, support vector regression, and particle swarm optimization algorithms. And it significantly reduced redundancy within the samples by adopting the interval sequence sample. Moreover, metrics such as root mean square error (RMSE), mean absolute error (MAE), bias stability, and Allan variance, are selected to evaluate the model’s performance and compensation effectiveness. This work effectively enhances the consistency between data and models across different temperature ranges and temperature gradients, improving the bias stability of the FOG from 0.022 °/h to 0.006 °/h. Compared to the existing methods utilizing a single machine learning model, the proposed method increases the bias stability of the compensated FOG from 57.11% to 71.98%, and enhances the suppression of rate ramp noise coefficient from 2.29% to 14.83%. This work improves the accuracy of FOG after compensation, providing theoretical guidance and technical references for sensors error compensation work in other fields.

Key words: fiber optic gyroscope (FOG), temperature error compensation, composite model, machine learning, clustering, regression