Method for reducing radiation environment model indeterminacy influences on material performance evaluation

Abstract

The invention discloses a method for reducing radiation environment model indeterminacy influences on material performance evaluation. Based on an existing earth radiation belt model, radiation belt environmental parameters of a spacecraft in some orbit and task cycle during an in-orbit period are determined, thereby determining the selected parameters in carrying out spacecraft designs or evaluations, and a ground-based simulation experiment or numerical simulation are utilized to obtain performance changes and a change rule of the spacecraft and spacecraft sensitive materials; based on determined uncertainty factors, exposure material performance under certain uncertainty factors is compared with performance of not considering uncertainty, the selected gedanken experiment parameters areobtained referring to removing or reducing influences brought by space radiation environment model uncertainty. The required simulation experiment parameters of a space radiation environment model can be explicitly decreased or avoided.

Description

technical field [0001] The invention belongs to the technical field of aerospace general system performance evaluation, and particularly relates to a method for eliminating or reducing the influence of the uncertainty of the space radiation environment model on the performance evaluation of spacecraft materials, especially exposed materials. 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, c...

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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