Multi-Magnetic Source Discrimination Technology Inside the Spacecraft

doi:10.16183/j.cnki.jsjtu.2018.08.016

Abstract

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.

Key words: spacecraft, multi-magnetic dipoles, scanning extremum, Gauss-Newton algorithm, error

CLC Number:

O 441.2

XU Chaoqun,YI Zhong,CHEN Jingang,WANG Bin. Multi-Magnetic Source Discrimination Technology Inside the Spacecraft[J]. Journal of Shanghai Jiaotong University, 2018, 52(8): 991-996.

References

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