光纤陀螺脱骨架光纤环温度性能研究  

Temperature Performance of FOG De-Skeleton Sensing Fiber Coil

作　　者：刘海锋 谭满清[1,2] 张学亮 于中权 尚艳玲 Liu Haifeng;Tan Manqing;Zhang Xueliang;Yu Zhongquan;Shang Yanling(State Key Laboratory of Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Hunan Institute of Aerospace Electromechanical Equipment and Special Materials,Changsha 410205,China)

机构地区：[1]中国科学院半导体研究所集成光电子国家重点实验室,北京100083 [2]中国科学院大学材料科学与光电工程中心,北京100049 [3]湖南航天机电设备与特种材料研究所,长沙410205

出　　处：《天津大学学报（自然科学与工程技术版）》2021年第10期1070-1075,共6页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金重点资助项目(61935018).

摘　　要：通过有限元仿真分析了光纤陀螺内部热源和外部热源激励下的温升和轴向、径向、周向的温度梯度,分析表明轴向温度梯度最大.基于光纤陀螺Shupe效应,使用ANSYS有限元分析软件建立温度模型对光纤陀螺脱骨架光纤环进行了仿真分析,分析了光纤环内部热源、外部热源导致的温度漂移误差,分析表明只有内部热源的情况下主要影响光纤陀螺启动性能,随时间变化的外部热源是光纤环温度误差主要来源,主要影响光纤陀螺的全温度范围零偏极差.分析了非均匀热场施加到光纤环圆周上距光纤环中点不同位置的温度误差,以及光纤环外部介质不同热导率和不同隔热层厚度对光纤环温度性能的影响,分析表明热源越靠近光纤环中心、脱骨架光纤环外部介质材料热导率越低、缓冲层越厚,光纤环的温度误差越小.采用热场基于光纤环中心对称设计、采用低热导率介质材料和较厚隔热层可以显著降低脱骨架光纤环温度误差.结果对于优化光纤陀螺结构设计,改善内部热场分布,提高光纤陀螺精度和环境适应性具有重要意义.The temperature rises and the axial,radial,and circumferential temperature gradients of fiber optic gyroscope(FOG)caused by internal and external heat sources are analyzed through the finite element simulation.The analysis shows that the axial temperature gradient is the largest.Based on the Shupe effect of FOG de-skeleton fiber coil,a temperature model is established with the use of the ANSYS finite element analysis software for error simula-tion of the FOG.Temperature drift error analysis reveals that the single internal heat source primarily affects the start-up performance of FOG,while the external heat source with time-domain variation becomes the dominant source of temperature error,which is mainly characterized by the zero deviation range.The temperature error caused by the nonuniform thermal field injected to different positions on the circumference from the midpoint of the optical fiber coil is analyzed and the effects of different medium thermal conductivity and the thickness of insulation layer are also explored.Analysis shows that the temperature error can be significantly reduced with the adoption of the following:①a symmetrical design of the thermal field of the optical fiber coil with the thermal source closer to the center,②adopting a low thermal conductivity of material,③utilizing a thicker insulation and buffer layer.It is of great significance to optimize the structure design of FOG,improve the internal thermal field distribution,and increase the accu-racy and the environmental adaptability of FOG.

关 键 词：光纤陀螺 Shupe效应 有限元分析 光纤环 温度性能 

分 类 号：TH744[机械工程—光学工程]