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Magnetic field reconstruction method based on distance weighted multi-pole expansion method

A technology of distance weighting and magnetic field, which is applied in the field of magnetic field reconstruction based on the distance weighted multi-pole expansion method, can solve the problems of low accuracy of magnetic field reconstruction, poor accuracy and robustness of reconstruction methods, etc., and achieve the goal of improving the accuracy of magnetic field reconstruction Effect

Active Publication Date: 2022-05-06
NAT SPACE SCI CENT CAS
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Problems solved by technology

To sum up, the current magnetic field reconstruction for space gravitational wave detection has poor accuracy and robustness under the condition of a small number of magnetometers. Low structure precision

Method used

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  • Magnetic field reconstruction method based on distance weighted multi-pole expansion method
  • Magnetic field reconstruction method based on distance weighted multi-pole expansion method
  • Magnetic field reconstruction method based on distance weighted multi-pole expansion method

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Embodiment 1

[0104] 1. Model design

[0105] The distribution of magnetic sources and magnetometers in the space gravitational wave detection spacecraft satellite platform is as follows: figure 1 shown. The magnetic components on the satellite are distributed outside the inertial sensor area and can be treated as one or more magnetic dipoles equivalently, figure 1 The dots in represent the magnetic dipoles. The radius of the dot represents the size of the magnetic moment. The two test masses (TM) form an angle of 60° and are 0.4m apart, figure 1 , cubes A and B represent TM1 and TM2 respectively, where TM1 is placed at the origin O of the coordinate system. Four small magnetometers (Magnetometer, denoted as Mag) are placed outside each TM electrode cage to measure the Magnetic field value B(B x , B y , B z ); figure 1 The four triangles placed at cube A represent the magnetometers Mag 1-4 placed near TM1; the four triangles placed at cube B represent the small magnetometers Mag 5-8 ...

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Abstract

The invention belongs to the technical field of space gravitational wave detection magnetic field reconstruction, and particularly relates to a magnetic field reconstruction method based on a distance weighted multi-pole expansion method, which comprises the following steps of: distributing magnetic components on a satellite outside two inertial sensor areas, enabling the magnetic components on the satellite to be equivalent to one or more magnetic dipoles to form a group of magnetic dipoles, the two inertial sensors respectively comprise a test mass, and four small magnetometers are respectively arranged outside an electrode cage of each test mass; according to a pre-established magnetic dipole theoretical model, obtaining a real magnetic field value of the magnetic field at the position of the to-be-solved test mass and real magnetic field values of the magnetic field at the positions of the eight small magnetometers; and performing distance weighting on the reconstruction error of each magnetometer based on a distance weighting multi-pole expansion method to obtain an optimal estimation multi-pole coefficient, and obtaining an estimated magnetic field value and a corresponding estimated magnetic field gradient value at a to-be-solved test mass position.

Description

technical field [0001] The invention belongs to the technical field of magnetic field reconstruction for gravitational wave detection in space, and in particular relates to a magnetic field reconstruction method based on a distance-weighted multipole expansion method. Background technique [0002] Inertial sensors are one of the core payloads of space gravitational wave detection missions. The magnetic field surrounding the test mass within a spacecraft is one of the major contributors to the overall acceleration noise budget of an inertial sensor. Due to the limitations of processing technology and other factors, the residual magnetization M and magnetic susceptibility χ of the test mass are extremely small values, but not strictly zero. Therefore, the magnetic field and magnetic field gradient will generate additional force on the test mass. In order to ensure the normal detection of gravitational waves, the environmental magnetic field gradient must be controlled within ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02
CPCG06F30/20G06F2119/02
Inventor 刘彬彬杨震强丽娥彭晓东马晓珊唐文林张玉珠
Owner NAT SPACE SCI CENT CAS
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