On-orbit health determination method suitable for medium and high orbit satellite-borne strong magnetic field output equipment

Abstract

The invention discloses an on-orbit health determination method suitable for medium and high orbit satellite-borne strong magnetic field output equipment. The method comprises the following steps: selecting magnetic sensitive equipment as a reference object according to the principle that the magnetic sensitive equipment is closest to strong magnetic field output equipment, and selecting performance indexes influenced by a magnetic field as research parameters according to the working principle of the magnetic sensitive equipment; in a satellite ground magnetic test, sequentially arranging strong magnetic field output devices in different directions of the whole satellite to be powered up; acquiring a magnetic field measurement value and an electrical performance index remote measurement value of the magnetic sensitive equipment under the working condition, and identifying a main magnetic field source at the position of the magnetic sensitive equipment; taking the magnetic field intensity and the electrical performance index at the position of the magnetic sensitive equipment as input parameters, and establishing a numerical model for describing the relationship between the two parameters by adopting a fitting method; selecting a satellite on-orbit working mode corresponding to the ground test working condition, substituting the on-orbit telemetry value of the electrical performance index of the magnetic sensitive equipment into the established numerical model, subtracting the on-orbit error term, and performing calculating to obtain the on-orbit magnetic field characteristic index of the evaluated strong magnetic field output equipment; and comparing the difference between the on-orbit magnetic moment calculation value of the high-intensity magnetic field output equipment and the performance index of the equipment to determine the on-orbit health state of the equipment.

Description

technical field [0001] The invention relates to an on-orbit health determination method adapted to medium-high orbit satellite-borne strong magnetic field output equipment, and belongs to the technical field of spacecraft on-orbit diagnosis and health assessment. Background technique [0002] For most navigation and communication spacecraft operating in medium-high earth orbits (orbital altitudes greater than 20,000km), the conventional method of frequently using thruster jets to unload angular momentum will cause platform orbit errors, resulting in dependence on high-precision The ephemeris payload cannot provide stable service. Therefore, the higher demand for attitude and orbit control accuracy and operational life (mainly related to propellant consumption) during daily on-orbit maintenance has led to the use of magnetic torque devices for momentum wheel unloading for this type of satellite. Since the magnetic field intensity in the middle and high earth orbit is very lo...

AI Technical Summary

Problems solved by technology

Since some mid-to-high-orbit satellites are not equipped with magnetometers, or are equipped with magnetometers but cannot be turned on at the same time as the magnetic torquer to avoid being affected, the lack of magnetic field measurement information has led to no way to output when the spacecraft’s magnetic torquer is working. Magnetic field strength and magnetic field gradient performance evaluation

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