Method for measuring satellite magnetic torque in geomagnetic environmental magnetic field

Abstract

The invention discloses a satellite magnetic moment measurement method in the geomagnetic environment magnetic field, which uses the characteristic that the satellite magnetic moment is consistent with the direction of the earth's magnetic field, simplifies the satellite magnetic moment to measure the satellite residual magnetic moment and the satellite magnetic moment, and uses three orthogonal The remanent magnetic moment in the direction is decomposed into the magnetic moment of the equatorial plane and the horizontal plane where the satellite is transposed by 90°. During the measurement, the satellite should not be turned over, and the vertical component of the magnetic induction moment should be separated; the measurement method uses three-component and single-component magnetometers , the magnetic sensor is arranged near the satellite, connected to the magnetometer main box through a 20m signal line, and the analog/digital converter converts the analog quantity into a digital quantity. Through the test software compiled in BC++ language under the Windows interface, the microcomputer has storage measurement functions for data, calculation of magnetic moments, and documentation. The invention has strong versatility and is easy to operate. Due to the short test time, the fluctuation of the environment magnetic field is small, the calculation error of the magnetic moment is also small, and the measurement accuracy reaches 7.5%.

Description

technical field [0001] The invention relates to a method for measuring the magnetic moment of a satellite, in particular to a method for measuring the magnetic moment of a satellite in the magnetic field of a geomagnetic environment. Background technique [0002] The permanent magnetic and magnetically sensitive materials used in the satellite will generate a magnetic field, and the loop current when the satellite is working will also generate a stray magnetic field. The interaction of these permanent magnetic fields, induced magnetic fields and stray magnetic fields with the space magnetic field produces interference torques on satellites operating in outer space, which affects the orientation and positioning accuracy of satellites and reduces the operating life of satellites. For satellites that measure the distribution of the magnetic field in space, the magnetic field data of the satellite itself should be obtained through measurement; The test of the satellite attitude...

AI Technical Summary

Problems solved by technology

In the geomagnetic field, the geomagnetic orientation method is used to measure the remanent magnetic moment of the satellite. The satellite does not need to be inverted, but it must be tilted to a certain extent. In addition to a special turntable for measuring the remanent magnetic moment, the operation is more complicated and the measurement accuracy is not ideal. The measurement error is about 20%

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