A method for evaluating the risk of charging effect on the surface of a spacecraft in-orbit surface

A technology for risk assessment and spacecraft, applied in the field of quantitative assessment of the risk of on-orbit surface electrification effects of spacecraft, can solve problems such as no risk assessment methods for surface electrification effects, and improve on-orbit safe and reliable operation, wide application range, and avoid failures Effect

Active Publication Date: 2019-02-12
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

The charging level on the surface of the spacecraft usually adopts the simulation method to calculate the possible charging state of the spacecraft in the worst environment. At present, there is no risk assessment method for the surface charging effect caused by the space environment of the spacecraft in orbit.

Method used

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  • A method for evaluating the risk of charging effect on the surface of a spacecraft in-orbit surface

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0016] A method for assessing the risk of electrification effect on the surface of an in-orbit spacecraft first divides the risk level of the electrification effect of the spacecraft, and then uses the real-time data of space environment monitoring to evaluate the electrification effect on the surface of the spacecraft and gives an early warning level. Specifically include the following steps:

[0017] (1) When the potential difference between adjacent different materials of the spacecraft reaches 500V, the danger of electrostatic discharge (ESD) will occur on the adjacent surface. The charging level and risk level can be divided according to design requirements or actual conditions, as shown in Table 1:

[0018] Table 1 Correspondence table between the charging level and the risk level on the surface of the spacecraft

[0019] Potential (V)

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Abstract

A method for evaluating the risk of charging effect on the surface of a spacecraft in-orbit surface which is based on the real-time monitoring of electron temperature and electron flux in the space environment of spacecraft in orbit, real-time intervention (active potential control) and emergency plan (shutdown of sensitive stand-alone) can be carried out to avoid serious failure caused by surfacecharging effect of spacecraft, which is of great significance to improve the safe and reliable operation of spacecraft in orbit. The in-orbit surface charging effect risk evaluation methods can be made according to different types of spacecraft, different orbit spacecraft, or different sensitive parts of spacecraft (such as solar cell array, etc.), so that the method has wider application range.

Description

technical field [0001] The invention belongs to the technical field of spacecraft space environment effect protection, and in particular relates to a method for quantitatively assessing the risk of electrification effects on the surface of a spacecraft in orbit. Background technique [0002] Magnetospheric storms / substorms will cause severe disturbances in the Earth’s space environment, and various particle events, thermospheric atmospheric density increases, ionospheric storms, etc. will cause serious threats to spacecraft activities, communication and navigation systems. Such as thermal plasma enhancement events, the energy injected by the space thermal plasma caused by the disturbance of the magnetosphere can be as high as tens of keV, which will cause the surface of the satellite to be charged to a higher potential and affect the safe and stable operation of the satellite. The statistics of satellite in-orbit failures show that most of the electrostatic discharge failure...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06
CPCG06Q10/0635
Inventor 李得天杨生胜秦晓刚蒋锴全林薛玉雄王小军王斌史亮王俊
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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