基于欧拉方法的多磁偶极子分辨技术

文章首次将欧拉反演方法应用于航天器内部多磁偶极子的分辨,通过测量航天器外围磁场及其梯度张量数据,采用欧拉反演算法来计算航天器内部主要磁性部组件的位置和磁矩参数。根据磁场梯度张量数据的测量特点,采取了网格式数据采集方式;然后推导了多点联合反演的欧拉方程组,并提出了一种在所有反演解中快速准确寻找最优解的方法;在此基础上利用遗传算法对反演最优解进行了优化。优化后的分辨结果表明:在小范围、多层次磁源分辨方面,计算出的磁源磁矩参数较为准确,且磁源位置最高分辨率优于0.01m。

Multi-dipoles discrimination technique based on Euler inverse method

The Euler inverse method is firstly applied to discriminate the multi-dipoles in a spacecraft by using the magnetic field data and the magnetic gradient tensor data measured around the spacecraft model and to calculate the position and the magnet parameters of those magnetic components. A grid-type measurement method is developed according to the way the magnetic gradient tensor data are collected. Then the multi-point Euler inverse equation is deduced, and a method of determining the best inverse solution is put forward to optimize the process with a genetic algorithm. Computational results show that the best resolution higher than 0.01 m can be expected in case that several dipoles are located randomly in a narrow field.