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基于歐拉方法的多磁偶極子分辨技術(shù)

Multi-dipoles discrimination technique based on Euler inverse method

  • 摘要: 文章首次將歐拉反演方法應(yīng)用于航天器內(nèi)部多磁偶極子的分辨，通過(guò)測(cè)量航天器外圍磁場(chǎng)及其梯度張量數(shù)據(jù)，采用歐拉反演算法來(lái)計(jì)算航天器內(nèi)部主要磁性部組件的位置和磁矩參數(shù)。根據(jù)磁場(chǎng)梯度張量數(shù)據(jù)的測(cè)量特點(diǎn)，采取了網(wǎng)格式數(shù)據(jù)采集方式；然后推導(dǎo)了多點(diǎn)聯(lián)合反演的歐拉方程組，并提出了一種在所有反演解中快速準(zhǔn)確尋找最優(yōu)解的方法；在此基礎(chǔ)上利用遺傳算法對(duì)反演最優(yōu)解進(jìn)行了優(yōu)化。優(yōu)化后的分辨結(jié)果表明：在小范圍、多層次磁源分辨方面，計(jì)算出的磁源磁矩參數(shù)較為準(zhǔn)確，且磁源位置最高分辨率優(yōu)于0.01m。

     

    Abstract: The Euler inverse method is firstly applied to discriminate me 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 paraeters of those magnedc components. A grid一type measurement method is developed according to the way the magnetic gmdient tensor data are coUected. Then the multi-point Euler inverse equation is deduced, and a method of detell：nining the best inverse solution is put forward to optimize the process with a genetic algorimm. Computational results show that the best resolution higher than 0.01m can be expected in case that several dipoles are located randomly in a narrow field.

     

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