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基于地磁场建模方法优缺点的分析,采用矩谐分析建模方法建立局部区域地磁场模型,并针对矩谐分析建模方法存在的不足,引入IGRF模型数据结合曲面样条插值的方法来补充边界区域地磁数据,通过模拟退火法优化粒子群算法推导矩谐模型系数,建立基于智能算法的局部区域地磁场矩谐模型,最后修正了矩谐分析建模方法存在模型精度低、边界振荡等问题。结果表明,改进后的矩谐分析建模方法建立的局部区域地磁场矩谐模型精度高,避免了传统的矩谐分析建模方法系数求解困难,建模边缘区域缺少建模数据,导致建立地磁场模型在边缘区域出现地磁场振荡现象。
Based on the analysis of the advantages and disadvantages of the geomagnetic field modeling method, the local harmonic magnetic field model is established by using the method of moment harmonic analysis and the deficiency of the modeling method based on the moment analysis is introduced. The IGRF model data and the surface spline interpolation method are used to supplement Boundary area geomagnetic data, the particle swarm optimization algorithm is used to derive the harmonic model coefficients, and the local area geomagnetic harmonic model based on intelligent algorithm is established. Finally, the problems of low accuracy and boundary oscillation of the modeling method are corrected . The results show that the improved local harmonic analysis modeling method has the advantages of high precision of local model of geomagnetic moment harmonic model, avoiding the difficulty of solving the traditional method of modeling of harmonic analysis, lack of modeling data in the modeling edge region, Magnetic field model appears geomagnetic field oscillation in the edge region.