Vector magnetometer and star sensor non-orthogonal installation matrix calibration system and method

Abstract

The invention provides an outdoor calibration system and method for a non-orthogonal installation matrix of a vector magnetometer and a star sensor. Including vector magnetometers, star sensors, non-magnetic turntables, data processing equipment, magnetometers for monitoring the earth's magnetic field, scalar magnetometers, GPS receivers, and theodolites. It mainly solves the problem of accurately obtaining the non-orthogonal installation matrix between the vector magnetometer and the star sensor outdoors. Under the outdoor conditions satisfying stargazing and stable magnetic gradient, the vector magnetometer and star sensor were installed on the non-magnetic turntable, and the installation matrix between the star sensor and the magnetometer was converted through multiple rotations. It has the characteristics of simple operation and high measurement accuracy, and can be used in fields such as space magnetic field, gravity field detection and other scientific experiment satellites.

Description

technical field [0001] The invention relates to the field of satellites, in particular to an outdoor calibration method for a non-orthogonal installation matrix of a vector magnetometer and a star sensor. Background technique [0002] Geomagnetism is an important part of geophysics and space physics, and it is a bridge connecting solid geophysics and space physics. It is composed of two parts, the basic magnetic field and the changing magnetic field. The basic magnetic field originates from the interior of the earth, and studying its change and origin is one of the important contents of geodynamics research; the changing magnetic field is related to changes in the ionosphere and solar activities. The study of changing magnetic fields is a hot topic in solar-terrestrial physics research. The changes in the magnetic field observed by satellites include a variety of rich information ranging from solar activities, interstellar space, magnetosphere, and ionosphere activities, d...

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Problems solved by technology

[0004] The patent CN 106092106A uses the NED coordinate system as the reference coordinate system. In a zero magnetic environment, the Euler angle relationship between the fluxgate sensor and the NED coordinate system and the Euler angle relationship between the star sensor and the NED coordinate system are obtained by rotation. Angle relationship, and finally get the Euler angle relationship between the star sensor and the fluxgate sensor. During the whole calibration process, the star sensor cannot observe the stars, but it is calibrated with the help of a star simulator, which cannot be sensitive to the magnetic axis of the vector magnetometer and the star. Calibration directly related to the optical axis of the

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