High-reliability quantitative FMECA analysis method and system of electronic equipment based on redundant design

Abstract

The invention provides a high-reliability quantitative FMECA analysis method and system of electronic equipment based on a redundant design. The method comprises the steps of: establishing equipment redundancy, and establishing a reliability block diagram of the electronic equipment; establishing a reliability mathematical model of a redundant detection according to a service life distribution service index and the reliability block diagram of the electronic equipment; determining an overall failure rate by using the reliability mathematical model, obtaining a derivation relationship between the reliability mathematical model and an FMECA analysis model, and forming a relationship mathematical model of the overall failure rate and the failure rate and the electronic equipment according tothe derivation relationship; and calculating a hazard value of the redundant design according to the relationship mathematical model, and performing failure positioning according to the hazard value.The failure rates of electronic components are adjusted according to the mathematical model, and the influence of the redundant design on the failure mode hazard through the quantitative FEMAA analysis, thereby improving the pertinence of the quantitative FEMAA analysis, so as to find weak links of products through the FMECA more effectively and to improve the reliability of the products.

Description

technical field [0001] The present invention relates to the technical field of aerospace electronic equipment reliability analysis, in particular to a quantitative FMECA analysis method and system for high-reliability electronic equipment based on redundant design. Background technique [0002] FMECA is an important reliability analysis method stipulated in GJB450, and it is one of the reliability work items that must be carried out in the development stage of aerospace electronic equipment. Therefore, there are special guidance documents or technical manuals for FMECA methods and procedures in the US military (DOD), key projects of NASA (NASA), European Space Agency (ESA), my country's military standards and aerospace standards. [0003] Failure mode effects and hazard analysis FMECA actually includes two work items, FMEA and CA, namely failure mode effects analysis and hazard analysis. The former is used to analyze all potential failure modes and their effects of the anal...

AI Technical Summary

Problems solved by technology

Based on the fault information database, fault mechanism analysis, fault mode exposure test, fault simulation analysis and other methods and considering multiple faults affecting the hardware FMECA method, it can provide a more objective and quantitative hardware FMECA implementation method for design analysts, and also for electronic Provide a basis for product design improvement, but the analysis process is too cumbersome and not efficient

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