Electrostatic charge clearing method and circuit of space station potential detector

Abstract

The invention discloses an electrostatic charge clearing method and circuit of a space station potential detector. The problem of signal drift caused by an inherent leakage current of the differentialcapacitance voltage division type space station potential detector is effectively solved. Through electrostatic charge clearing, a voltage dividing capacitor is restored to be in a power-on initial charge balance state before measurement. The problem that an error exceeds the standard due to continuous leakage of electrostatic charge can be effectively solved when the floating potential of a space station is measured, so that the floating potential measurement in the potential detection of the space station is more accurate and credible. The method is simple, practical and reliable.

Description

technical field

[0001] The invention belongs to the technical field of space potential detection, and in particular relates to a static charge clearing method and a zero clearing circuit of a space station potential detector. Background technique

[0002] my country's space station operates in an orbit with an inclination angle of 42° and an altitude of 350km to 450km. This orbit is located in the F2 region of the earth's ionosphere, which is filled with a large amount of high-density low-temperature plasma. Since the space station uses a 100V high-power solar cell array, the potential of the exposed positive electrode on the solar cell array is higher than the plasma potential, which will absorb electrons from the plasma environment, which will cause the structural potential of the space station (relative to the space plasma) to rise. The potential is about -90V when the coupling is balanced. At the same time, due to the large size of the space station, its structure cutti...

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