光纤陀螺磁热耦合效应研究

项目名称： 光纤陀螺磁热耦合效应研究

项目编号： No.61203190

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 自动化学科

项目作者： 张登伟

作者单位： 浙江大学

项目金额： 26万元

中文摘要： 光纤陀螺在磁、热两种物理场同时作用下，产生新的输出现象。其漂移并非单纯磁场和单纯热场下分别产生漂移的简单叠加，漂移的幅度比两单独物理场分别产生漂移的代数和大数倍，存在陀螺受磁-热两种物理场相互耦合作用的新机制。搞清磁-热耦合效应产生的机理，对于研制光纤陀螺、提高光纤陀螺的环境适应性具有指导意义。 建立光纤陀螺磁-热两种物理场产生耦合效应的数学模型，使用有限元方法对陀螺核心敏感环进行磁、热及磁-热耦合性能仿真分析，揭示磁-热耦合漂移与磁场、温度、光纤陀螺敏感环各参数之间的关系，将仿真结果带入理论模型计算磁-热耦合漂移的大小。设计磁-热实验环境，利用已有的干涉式消偏光纤陀螺系统，对仿真结果进行实验验证。试图在温度范围为10℃～60℃、温升为1℃/分钟的热环境下，将消偏光纤陀螺的磁场灵敏度抑制到小于0.01 /h/mT。

中文关键词： 光纤陀螺；磁热交联耦合效应；有限元分析；轴向磁场；磁漂移

英文摘要： New output phenomenon appears,when fiber optic gyroscope(FOG) is in the magnetic field and temperature varying at the same time. The drift is not the accumulating of the drift from magnetic field and the one from the temperature varying. The amplitude of the magnetic- temperature drift is much more than the sum that the magnetic field drift and the temperature field drift add together. The new mechanism that the magnetic field and the temperature field interact each other to FOG exists. So the research on the mechanism that the magnetic field and the temperature interact each other is very important to manufacturing FOG and improving the environment suitability of FOG. To establish the mathematics model that the two physical field, magnetic and temperature, affect FOG, to analyze the temperature, magnetic and magnetic- temperature performance of the fiber loop which is the sensitive core of FOG, to show the relationship between the magnetic-temperature coupling effect with magnetic field, temperature field and the fiber loop's parameters of FOG, and to calculate the magnitude of the magnetic-temperature coupling noise from putting the emulating result into the theory model are the main contents. To design the magnetic-temperature experiment circumstance tests and verifies the emulating result, making us

英文关键词： fiber optic gyroscope；magneticthermal coupling effaction；finite unit analysis；axial magnetic feild；magnetic drift