Improved component compensation for geomagnetic field vector measurement using Lagrange multiplier method

Improved component compensation for geomagnetic field vector measurement using Lagrange multiplier method
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使用拉格朗日乘子法改进地磁场矢量测量的分量补偿

DOI:
10.1049/iet-smt.2016.0522
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发表时间:
2017-08
影响因子:
1.4
通讯作者:
Wu Fenghe
Wu Fenghe
中科院分区:
工程技术4区
文献类型:
--
作者:
Wan Chengbiao;Pan Mengchun;Zhang Qi;Pang Hongfeng;Zhu Xuejun;Pan Long;Sun Xiaoyong;Wu Fenghe

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由于惯性导航系统的铁磁性和杂散磁场,磁场畸变分量补偿对于地磁场矢量测量系统具有重要意义。然而,传统的标量补偿方法不能用于磁场畸变的分量补偿,因此本文对分量补偿进行了一些改进,主要是利用拉格朗日乘子法估计补偿参数。实验结果表明,分量补偿方法的性能明显优于传统的标量补偿方法。补偿后,由磁场畸变引起的北向、垂直、东向分量和总强度的最大测量误差分别减小到10.4nT(占原始误差的0.91%)、32.5nT(占原始误差的5.20%)、12.9nT(占原始误差的1.27%)和18.4nT(占原始误差的2.02%)。    与以往的分量补偿法相比,该方法具有设备简单、操作过程简单、通用性强等优点。
Owing to the ferromagnetism and stray fields of inertial navigation system, component compensation of magnetic field distortion is significant for geomagnetic field vector measurement system. However, traditional scalar compensation methods cannot be used for component compensation of magnetic field distortion, so some improvement works have been researched for component compensation in the study, the major of which is estimating compensation parameters using the Lagrange multiplier method. Experiment results show that the performance of the component compensation method is much better than traditional scalar compensation method. After compensation, the maximal measurement errors of north, vertical, east components and total intensity caused by magnetic field distortion are reduced to 10.4 nT (0.91% of the raw error), 32.5 nT (5.20%), 12.9 nT (1.27%), and 18.4 nT (2.02%), respectively. In addition, compared with previous component compensation method, the proposed method has three advantages: (i) simplified equipment, (ii) easier operation process, and (iii) better generality.
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