【摘要】 针对消磁界中固定磁性分解的难题,提出了一种等效磁源拟合的方法.首先通过对磁源磁场垂向分量总和曲线的分析归纳出磁偶极子描述舰船磁场的先验知识,然后利用此先验知识确定拟合磁场所用磁源的数量及位置范围,并对磁源磁矩范围进行估计,最后以此作为约束条件利用遗传算法解算出磁源的参数,从而可以计算出舰船的固定磁场分量.仿真计算和船模试验的结果表明该方法能够比较好地搜索到磁偶极子的最佳组合方式及其位置和磁矩,可以用于舰船固定磁性的分解.更多还原

【Abstract】 An equivalent source fitting method is proposed to decompose the permanent magnetic field of ships.First,transcendental equations for the magnetic fields of warships are generalized and analyzed to derive the vertical components of the magnetic source field.Then,by using the transcendental equations,the number and location of magnetic sources are determined,and the range of magnetic moments estimated.Finally,the parameters of these magnetic sources are worked out by genetic algorithms with the previously estimated parameters as constraints,and in this way the components of the permanent magnetic field of ships calculated.The results of simulations and experiments with ship models indicate that this method can derive the optimal combination modes of magnetic dipoles and their positions and corresponding magnetic moments,suitable for the decomposition of the permanent magnetic field of ships.更多还原