Device and method for correcting error of triaxial magnetometer

A technology of three-axis magnetism and magnetometer, which is applied in the aerospace field, can solve the problems of inaccurate calibration and real-time update of the three-axis magnetometer, and achieve the effect of accurate fitting results

Pending Publication Date: 2021-03-09
SPACETY CO LTD (CHANGSHA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical solutions are still unable to accurately correct and update in real time the error of the positive three-axis magnetometer after it goes to the sky

Method used

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  • Device and method for correcting error of triaxial magnetometer
  • Device and method for correcting error of triaxial magnetometer
  • Device and method for correcting error of triaxial magnetometer

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Effect test

Embodiment 1

[0049] Aiming at the deficiencies of the prior art, the present invention provides a device for correcting the error of the three-axis magnetometer, at least including an on-board calculation module 40 for correcting the magnetic field parameters of the three-axis magnetometer, such as figure 1 shown. The onboard calculation module 40 establishes communication connections with the star sensor 10 , the orbit measurement component 20 and the three-axis magnetometer 30 on the satellite respectively.

[0050] The star sensor 10 is used to send the attitude measurement parameters of the spacecraft to the on-board computing module 40 . The orbit measurement component 20 includes a Global Navigation Satellite System (GNSS) receiver or means for noting orbit parameters from the ground. The orbit measurement component 20 is used to send the receiving and / or collecting orbit parameters of the spacecraft to the on-board computing module 40 . The three-axis magnetometer 30 is used to me...

Embodiment 2

[0074] The present invention also provides a method for correcting the error of the three-axis magnetometer, which at least includes the following steps:

[0075] S1: start;

[0076] S2: receiving or collecting attitude measurement parameters, orbital parameters and first geomagnetic field parameters;

[0077] S3: Calculate the nominal geomagnetic field parameters of the current position based on the attitude measurement parameters and orbital parameters;

[0078] S4: Using the nominal geomagnetic field parameters as reference values, calculate the error coefficient of the geomagnetic field;

[0079] S5: Fitting the first geomagnetic field parameters based on the least square method to obtain corrected second geomagnetic field parameters.

[0080] The method of calculating the nominal geomagnetic field parameters of the current position based on attitude measurement parameters and orbital parameters is as follows:

[0081] (1) On the premise of knowing the velocity and posi...

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Abstract

The invention relates to a device and a method for correcting an error of a triaxial magnetometer. The device at least comprises a satellite-borne calculation module (40) which is in communication connection with a star sensor (10), an orbit measurement assembly (20) and a triaxial magnetometer (30). The correction mode of the satellite-borne calculation module (40) is that nominal geomagnetic field parameters of a current position are calculated based on attitude measurement parameters sent by the star sensor (10) and orbit parameters sent by the orbit measurement assembly (20); and a first geomagnetic field parameter sent by the triaxial magnetometer (30) is fit into a corrected second geomagnetic field parameter based on a least square method by taking the nominal geomagnetic field parameter as a reference value. By generating the real-time magnetic compensation parameters, the errors caused by real-time changes of a satellite electromagnetic environment are effectively eliminated.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a device and method for correcting errors of a three-axis magnetometer. Background technique [0002] In recent years, three-axis magnetometers and MEMS gyroscopes have been widely used in orbiting satellites. However, due to the harsh environment and manufacturing process constraints, in actual measurements, the actual results have a huge deviation from the ideal data. [0003] A magnetometer is a sensor used to measure the strength and direction of the Earth's magnetic field. The satellite needs to use the measurement results of the magnetometer when performing attitude control and unloading angular momentum. Industrial-grade magnetometers are usually used in microsatellites, which are cheap, small in size, and low in weight, but they also have the disadvantages of poor stability and poor environmental adaptability. Therefore, in order to cope with the complex space enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00G01R33/00G01C21/08
CPCG01C25/00G01C21/08G01R33/0082G01R33/007
Inventor 寇义民王浩阳军军杨峰任维佳
Owner SPACETY CO LTD (CHANGSHA)
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