Method for reducing influence of uncertainty of radiation environment model on performance evaluation of spacecraft

Abstract

The invention discloses a method for eliminating or reducing the influence of the uncertainty of a spatial radiation model on the performance evaluation of a spacecraft. On the basis of the existing earth radiation belt model, radiation belt environment parameters in the on-orbit period of the aircraft in a certain orbit and within a task cycle are determined, parameters selected when the design or evaluation of the spacecraft is carried out are determined, and performance changes and performance change rules of the spacecraft or spacecraft sensitive materials are obtained by utilizing groundsimulation experiments or numerical simulation; based on determined uncertainty factors, the performance of the exposed materials under certain uncertainty factors is compared with the performance without considering the uncertainty, and ideal test parameters which need to be selected for eliminating or reducing the influence caused by the uncertainty of the spatial radiation environment model areobtained. By means of the method, the simulation test parameters required for reducing or avoiding the uncertainty of the spatial radiation environment model can be defined.

Description

technical field [0001] The invention belongs to the technical field of aerospace general system performance evaluation, in particular to a method for eliminating or reducing the influence of space radiation model uncertainty on spacecraft performance evaluation. Background technique [0002] Charged particle radiation in low-Earth orbit mainly comes from the Earth's radiation belt, solar cosmic rays, and galactic cosmic rays, and its main components are electrons, protons and a small amount of heavy ions. Among them, the Earth's radiation belt environment is one of the most important radiation environments affecting spacecraft in low-Earth orbit, and can usually be divided into the inner radiation belt and the outer radiation belt. The environmental models of the Earth's radiation belt are mainly AE series electron radiation environment models and AP series proton radiation environment models, currently the most commonly used AE8 electron radiation environment models and AP8...

AI Technical Summary

Problems solved by technology

The AE / AP model can only provide the flux in and around the solar valley year or the solar peak year, but not the variation during the solar cycle

[0007] Second, transient

[0011] However, in the process of spacecraft design analysis, due to the uncertainty of the space radiation environment model, designers often choose a magnification (such as 2 times) randomly to determine the parameters of the space radiation environment based on the average model of the space radiation environment , but no corresponding analysis of the impact of this uncertainty on the final result

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