• 学报（中文） •

### 航天器内部多磁源分辨技术

1. 北京卫星环境工程研究所， 北京 100094
• 收稿日期:2017-04-25
• 通讯作者: 易忠，男，研究员，博士生导师，电话(Tel.)：010-68112092; E-mail: yizhong6808@sina.com.
• 作者简介:徐超群（1985-），男，陕西省宝鸡市人，博士生，研究方向为航天器磁环境工程.E-mail: xucq111@163.com.
• 基金资助:
国家重点研发计划（2016YFB0501304）

### Multi-Magnetic Source Discrimination Technology Inside the Spacecraft

XU Chaoqun,YI Zhong,CHEN Jingang,WANG Bin

1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
• Received:2017-04-25

Abstract: In order to analyze the nonlinear magnetic field equations in research of multi-magnetic source resolution in spacecraft, a multi-magnetic dipole model of spacecraft is established. The scanning extremum method is used in Gauss-Newton algorithm to break through the difficulty of the number of magnetic sources and the initial iteration values, and the inversion problem is well done. The results show that Gauss-Newton algorithm sometimes fails due to incorrect selection of initial iterative values, but the good one can accelerate the convergence. When the calculated dipoles are more than the real ones, the method can be used, but the result is not reliable. On the contrary, it will fail. The influence is big and inclines to increase with the increasing dipoles. Gauss-Newton method fails due to the excessive number of inversion parameters when the dipoles are more than four.