Method and experiment for compensating the interferential magnetic field in underwater vehicle

Method and experiment for compensating the interferential magnetic field in underwater vehicle
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水下航行器干扰磁场补偿方法及实验

DOI:
10.1016/j.measurement.2013.09.037
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发表时间:
2014
期刊:
影响因子:
5.6
通讯作者:
Pan Meng-Chun
Pan Meng-Chun
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang Qi;Li Ji;Chen Di-Xiang;Pan Meng-Chun

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航行器干扰磁场的补偿是水下地磁导航的关键技术。干涉场补偿的实质是估计干涉场的模型参数,并利用这些参数计算地磁场。由于测量数据在手势空间的分布不充分,最小二乘法会出现秩亏问题。为了提高测量数据的完备性,本文对车辆航行轨迹进行了优化,并采用微分进化算法估计干扰磁场的模型参数。为了验证补偿效果,进行了水下实验。补偿后的地磁场测量误差由原来的1万多nT降到了数万nT。与最小二乘算法相比,DE算法在精度上具有更好的性能。结果表明,该方法能有效补偿航行器干扰场,从而提高水下航行器的地磁场测量精度。
It is the key technique for underwater geomagnetic navigation to compensate vehicle interferential magnetic field. The essential of interferential field compensation is to estimate model parameters of interferential fields and use the parameters to compute geomagnetic field. The rank-deficient problem will appear with least square method because the distribution of measurement data in gesture space is insufficient. In this paper, the vehicle voyage track is optimized to improve the completeness of measurement data and differential evolution (DE) algorithm is adopted to estimate model parameters of interferential magnetic field. Underwater experiments are carried out to validate the compensation effect. After compensation, the measurement error of geomagnetic field has decreased from more than ten thousands nT to tens of nT. Compared with least-square algorithm, the DE algorithm has better performance in accuracy. The results demonstrate that the proposed method can effectively compensate vehicle interferential field effectively and thus improve measurement accuracy of geomagnetic field for underwater vehicle.
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发表时间: 2005-09
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