基于FRM的直升机载光纤惯导用抗振型光源研究  

Vibration-Resistant Fiber Source for Helicopter-Borne Fiber Optic Inertial Navigation Based on FRM

作　　者：张恩康 张红伟 李雷[1] 步鑫 ZHANG Enkang;ZHANG Hongwei;LI Lei;BU Xin(China Helicopter Research and Development Institute,Tianjin 300000,China;Army Aviation Representative Office,General Staff,PLA,Jingdezhen 333000,China)

机构地区：[1]中国直升机设计研究所,天津300000 [2]陆军驻景德镇地区航空军事代表室,江西景德镇333000

出　　处：《电光与控制》2023年第4期116-121,共6页Electronics Optics & Control

摘　　要：振动性能是评价高精度直升机载光纤陀螺环境可靠性与性能稳定性的一个重要指标,光源作为直升机载光纤惯导的源头部件,需要保证其在振动条件下性能的稳定输出。针对光源平均波长随振动变化的问题,从基本机理出发,通过建立光路琼斯矩阵模型,深入研究了光纤中传输光的偏振态与偏振相关损耗之间的关系,在不增加光源系统复杂性的情况下提出了一种基于法拉第旋转镜的直升机载光纤惯导用抗振型光源,并实验验证了其抗振动性能。实验表明,提出的方案可以大大提高光源和光纤惯导振动条件下的稳定性,特别是高频振动条件下(1000~2000 Hz),光源的平均波长稳定性提高了6.8×10^(-6)。Vibration performance is an important index to evaluate the environmental reliability and performance stability of high-precision helicopter-borne fiber-optic gyroscopes.As the source component of helicopter-borne fiber-optic inertial navigation,the fiber source needs to ensure its stable output under vibration conditions.Aiming at the problem of the mean wavelength of the fiber source changing with vibration,based on the basic mechanism,the Jones matrix model of the optical path is established to deeply study the relationship between the polarization state of the transmitted light in the fiber and the polarization-dependent loss.Without increasing the complexity of the fiber source system,a vibration-resistant fiber source for helicopter-borne fiber-optic inertial navigation based on Faraday rotating mirror is proposed,and its performance on vibration resistance is verified through experiments.The experimental results show that the proposed scheme can improve the stability of the fiber source and fiber-optic inertial navigation under vibration conditions to a great extent.Especially under the conditions of high-frequency vibration(1000~2000 Hz),the mean wavelength stability of the fiber source is improved by 6.8×10^(-6).

关 键 词：光纤陀螺 掺铒光纤光源 抗振型 法拉第旋转镜 平均波长 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]