光纤陀螺温度漂移建模与补偿控制理论及控制工程专业论文.docxVIP

哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学工学硕士学位论文 Abstract Fiber optic gyroscope (FOG) is a new type of angle-velocity transducer, with the merits of fast startup, wide dynamic range, small volume, light in weight and so on. They attract pubic attention widely since invented. With the deepening of the study, the request of the moderate highly-precision has been enhanced. But the kernel components are so sensitive to temperature that temperature becomes one of the most difficult problems for fiber-optic gyroscope to the entry into practical engineering. It compensates temperature drift of FOG by modeling thermally-induced error in this thesis. In this thesis, based on output of medium precision FOG, thermal factors which influence FOG drift are studied. Quantitative analysis and qualitative analysis are introduced and influences of temperature ramp and secondary ramp are made out. Finally the general temperature drift model is built. The model which has a uniform structure is based on subsection making use of temperature ramp and secondary ramp as of subsection basis, figuring out model factor according to least square method. The range of temperature experiments are between -40℃～ +60℃. New data are used to validate the model. After compensation, the precision of FOG can achieve at 0.1°/h, increased by 50%. The model is proven to be viable and effective. Keywords Fiber optic gyroscope; temperature drift; relativity analysis; model identification; least square - II - - - PAGE IV - 目录 摘 要I Abstract II 第 1 章 绪论 1 1.1 课题来源及其研究的目的和意义 1 1.2 光纤陀螺的国内外动态和发展趋势 2 1.2.1 国外研究现状 2 1.2.2 国内发展概况 4 1.3 论文主要内容 4 第 2 章 光纤陀螺的工作原理及温度误差特性 6 2.1 引言 6 2.2 光纤陀螺原理 6 2.3 影响光纤陀螺仪精度的主要因素 8 2.4 各个光学器件的温度特性 10 2.4.1 光源 10 2.4.2 光纤环 11 2.4.3 相位调制器的温度效应 13 2.4.4 光电探测器受温度的影响 13 2.5 光纤陀螺温度漂移的抑制方法 14 2.6 本章小结 15 第 3 章 光纤陀螺温度试验与数据相关性分析 17 3.1 引言 17 3.2 光纤陀螺温度试验内容及方法 17 3.3 光纤陀螺温度试验 18 3.3.1 水泥台上的室温试验 18 3.3.2 温箱中的恒定温度点试验 19 3.3.3 变温试验 22 3.4 相关性分析 23 3.5 恒温情况下温