A method to reduce the influence of radiation environment model uncertainty on material performance evaluation

Abstract

The invention discloses a method for reducing the influence of the uncertainty of the radiation environment model on material performance evaluation. Based on the existing earth radiation belt model, the radiation belt environmental parameters of the spacecraft in a certain orbit and mission period are determined during the orbit, In order to determine the parameters selected when carrying out spacecraft design or evaluation, and use ground simulation experiments or numerical simulations to obtain the performance changes and changing laws of spacecraft or spacecraft sensitive materials; based on the determined uncertainty factors, a certain uncertainty factor The performance of the exposed material under the following conditions is compared with the performance without considering the uncertainty, and the ideal test parameters should be selected to eliminate or reduce the influence of the uncertainty of the space radiation environment model. The invention can clearly reduce or avoid the simulation test parameters needed to reduce or avoid the uncertainty of the space radiation environment model.

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

Images