| 高精度光纤IMU的磁屏蔽方法及实验研究 |
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| 引用本文： | 李金涛,房建成.高精度光纤IMU的磁屏蔽方法及实验研究[J].航空学报,2011,32(11):2106-2116. |
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| 作者姓名： | 李金涛 房建成 |
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| 作者单位： | 北京航空航天大学“新型惯性仪表与导航系统技术”国防重点学科实验室,北京,100191 |
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| 基金项目： | 国家“973”计划(2009CB724001,2009CB724002); 国家“863”计划(2008AA121302)~~ |
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| 摘 要： | 惯性测量单元(IMU)是位置姿态系统(POS)的核心部分,IMU的精度很大程度上决定着POS精度.由于高精度光纤陀螺(FOG)的光纤线圈对磁场敏感,基于高精度FOG的IMU精度会受磁场影响而降低.本文研究了FOG磁敏感性机理,通过实验得出高精度光纤IMU对磁场敏感的结论.采用电磁场有限元分析软件Ansoft Maxwe...
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| 关 键 词： | 惯性测量单元 光纤陀螺 频谱分析 功率谱密度 有限元方法 磁屏蔽 |
| 收稿时间： | 2011-04-11; |
Magnetic Shielding Method and Experiment Study of Inertial Measurement Unit Based on High Precision Fiber-optic Gyroscope |
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| LI Jintao,FANG Jiancheng.Magnetic Shielding Method and Experiment Study of Inertial Measurement Unit Based on High Precision Fiber-optic Gyroscope[J].Acta Aeronautica et Astronautica Sinica,2011,32(11):2106-2116. |
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| Authors: | LI Jintao FANG Jiancheng |
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| Institution: | LI Jintao,FANG Jiancheng Fundamental Science on Novel Inertial Instrument & Navigation System Technology Laboratory,Beihang University,Beijing 100191,China |
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| Abstract: | The inertial measurement unit(IMU) is the core of a position and orientation system(POS),whose accuracy has a crucial impact on POS accuracy.But the IMU accuracy based on high precision fiber-optic gyroscope(FOG) is degraded because of the sensitivity of the FOG fiber coil to the magnetic field.This paper studied the magnetic sensitivity mechanism of the FOG,and through experimental study reached the conclusion that the IMU based on a high precision FOG is also sensitive to the magnetic field.An IMU shieldi... |
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| Keywords: | inertial measurement unit fiber-optic gyroscope frequency spectrum analysis power spectral density finite element method magnetic shielding |
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