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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 Maxwell研究了磁屏蔽体采用不同材料、不同厚度时的磁屏蔽效能(SE),并进行了IMU磁...
GPS/Reduced IMU with a Local Terrain Predictor in Land Vehicle Navigation
GPS/Reduced IMU Local Terrain Predictor Land Vehicle Navigation
2009/9/3
In order to reduce the cost and volume of land vehicle navigation (LVN) systems, a “reduced” inertial measurement unit (IMU) consisting of only one vertical gyro and two or three accelerometers is gen...