Method and system for predicting output power of spacecraft solar wing in orbit during full life cycle

Abstract

The present invention discloses a spacecraft solar wing in-orbit full life cycle output power prediction method and system. The method comprises the steps of: calculating in-orbit solar wing output feature over-all attenuation factors of each moment according to telemetry data of an in-orbit output short-circuit current and an open-circuit voltage and ground calibration data, and performing fitting to obtain a changing curve of the over-all attenuation factors with time; and for an in-orbit random moment t to be predicted, calculating a solar wing output feature according to a real-time solarincident angle, an in-orbit operating temperature, an earth-sun distance and two attenuation factors FI(t) and FV(t) at a t moment in the changing curve to predict a solar wing in-orbit random momentoutput power. The spacecraft solar wing in-orbit full life cycle output power prediction method and system overcome defects that a traditional estimation method only can calculate a solar wing outputpower at a life last phase and can effectively reflect real performances of the solar wing in-orbit.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and relates to a method and a system for predicting the output power of a spacecraft solar wing in orbit in its entire life cycle. Background technique [0002] The solar wing is a power generation system composed of photoelectric conversion devices, which is responsible for providing power for the spacecraft bus and charging the battery pack during the light period. When designing the electrical performance of the solar wing in the spacecraft program stage, it is necessary to consider the influence of temperature alternation, charged particle radiation, ultraviolet radiation, micro-meteorite, etc., which will cause the performance degradation of the solar cell to ensure that the performance of the solar wing in orbit declines throughout the life cycle. The final actual output power meets the power requirements during the life of the spacecraft. Accurately predicting the output power of the s...

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