A method for controlling the electrification effect on the surface of a spacecraft in orbit

Abstract

The invention discloses a method for controlling the electrification effect on the surface of a spacecraft. Firstly, based on the relationship between the electron flux and the surface potential of the spacecraft, and the relationship between the plasma temperature and the surface potential of the spacecraft, and according to the potential threshold that the surface of the spacecraft can bear, the general In real-time control, by monitoring the electron flux and electron temperature in real time, the potential active controller switch can be controlled to achieve the purpose of surface potential control; since the electron flux and plasma temperature are observed, and Based on this, it is predicted whether the surface of the spacecraft can reach the potential threshold and the surface potential control is performed instead of the potential control after the accumulation of electrons and plasma on the surface of the spacecraft reaches the potential threshold, so the response speed can be improved, and the surface charge of the spacecraft can be improved. Active control for stability and accuracy.

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 controlling the electrification effect on the orbital surface of a spacecraft. 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. Studies have shown that the injected thermal plasma electron flux and electron temperature have an important impact on the...

AI Technical Summary

Problems solved by technology

Passive control is through grounding, or coating or wrapping a layer of anti-static film on the surface of the spacecraft, which reduces the surface charge to a certain extent, but cannot completely reduce the surface potential of the spacecraft

Active control is a potential control method developed in recent years, which releases the charge accumulated on the surface of the spacecraft by launching a particle beam, but the existing method is 1) triggered by surface potential monitoring, but there is a delay; 2 ) Set the potential active control system to trigger regularly, which cannot respond to changes in the environment in time; 3) Trigger through ground telemetry, due to the delay of signal transmission, the lag of the control is serious.

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