Multistage comprehensive fuzzy evaluation method for health state of reusable aircraft structure

Abstract

The invention relates to a reusable aircraft structure health state multi-stage comprehensive fuzzy evaluation method. The invention relates to the technical field of reusable aircraft structure health state evaluation, and the method comprises the steps: converting spacecraft evaluation indexes into elements, and forming a factor set; forming a comment set according to various results made by the evaluation target; through structural health monitoring, a membership function is determined, and a multi-level evaluation model and a single-factor evaluation matrix are constructed; and determining an evaluation result, and taking the finally obtained membership degree as a comprehensive index for representing the health degree of the structure. According to the method, a quantitative mapping relation between material microscopic damage and structure macroscopic attenuation is established, and the defect of independent evaluation of cross-scale damage in a traditional method is overcome.

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