A Review of the Mechanism and Suppression Methods for Thermally Induced Bias Drift Error in Fiber Optic Gyroscope Optical Path

ZHANG Tianle; WEN Kunhua; ZHANG Xiang; LIN Cuofu; YANG Jun

doi:10.15892/j.cnki.djzdxb.2024.05.003

Journal of Projectiles, Rockets, Missiles and Guidance >

2024 , Vol. 44 >Issue 5: 14 - 24

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.05.003

A Review of the Mechanism and Suppression Methods for Thermally Induced Bias Drift Error in Fiber Optic Gyroscope Optical Path

ZHANG Tianle ¹ ,
WEN Kunhua ¹^,⁴^,⁵ ,
ZHANG Xiang ²^,³^,⁴^,⁵ ,
LIN Cuofu ²^,³^,⁴^,⁵ ,
YANG Jun ²^,³^,⁴^,⁵

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¹ School of Physics & Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
² Institute of Advanced Photonics Technology, Guangzhou 510006, Guangdong, China
³ School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
⁴ Key Laboratory of Photonic Technology for Integrated Sensing an Communication, Ministry of Education of China,Guangdong University of Technology, Guangzhou 510006, Guangdong, China
⁵ Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, Guangdong, China

Received date: 2024-08-13

Online published: 2024-12-18

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Abstract

The fiber optic gyroscope (FOG) serves as a high-precision angular velocity sensor and plays a critical role in inertial navigation, positioning and orientation, and attitude control systems. However, the thermally induced bias drift error in the optical path of FOG is a critical factor limiting the improvement of gyroscope precision. Through the analysis of Shupe effect, Mohr effect and cross term effect, the mechanism of the thermally induced bias drift error is explained. Factors influencing bias drift are summarized from both internal causes (geometric and physical symmetry) and external causes (environmental impacts and physical field excitation). Furtherly, detection technologies used to detect the key factors (specifically fiber coil strain and temperature distribution) of the internal and external causes, such as Brillouin optical time domain analysis (BOTDA), optical frequency domain reflectometry (OFDR), and Raman optical time domain reflectometry (ROTDR), is reviewed. In the end, various measures and methods to suppress bias drift, including optimization of fiber coil winding processes, application of specialty fibers, adjustment of tail fiber length, and temperature compensation techniques, is discussed. These studies lay a foundation for further improvements in the measurement accuracy and environmental adaptability of navigation-grade FOG under harsh conditions.

Key words： fiber optic gyroscope; thermally induced bias drift; optical path symmetry; distributed testing; bias drift error suppression

Cite this article

ZHANG Tianle , WEN Kunhua , ZHANG Xiang , LIN Cuofu , YANG Jun . A Review of the Mechanism and Suppression Methods for Thermally Induced Bias Drift Error in Fiber Optic Gyroscope Optical Path[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2024 , 44(5) : 14 -24 . DOI: 10.15892/j.cnki.djzdxb.2024.05.003

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