Layered FMECA method and system for multi-layer structured product

Abstract

The invention discloses a layered FMECA method and system for a multi-level structured product, and the method comprises the steps: obtaining all levels of products of the multi-level structured product, and determining the implementation sequence and implementation object of the layered FMECA of the multi-level structured product; constructing a hierarchical FMECA analysis table of each level of product according to the implementation sequence and the implementation object; carrying out layer-by-layer analysis on the hierarchical FMECA analysis table of each level of product from bottom to top, and determining a fault transmission relation influencing the multi-level structured product; determining a failure rate of a failure mode which affects the operation of the multi-level structured product according to the failure transfer relationship; and analyzing and processing the failure rate of the fault mode to obtain an RAM index, and performing RAM performance analysis on the multi-level structured product through the RAM index. According to the method, the data information among all levels of products can be integrated, so that the influence of the fault mode of each hardware on the whole large system can be intuitively analyzed, and the accuracy of FMECA analysis of the products is improved.

Description

technical field [0001] The invention relates to the technical field of product reliability analysis, in particular to a hierarchical FMECA method and system for multi-level structured products. Background technique [0002] FMECA (Failure Mode Effects and Criticality Analysis, Failure Mode Effects and Criticality Analysis) analysis is to analyze all possible failure modes of each product in the system and all possible impacts on the system, and analyze the occurrence of each failure mode An inductive analysis method that classifies the frequency, impact on the system, and severity of the impact. It uses an inductive method to comprehensively analyze every possible failure mode and its consequences in product design. Identify design weaknesses through thorough analysis, implement improvements and controls. [0003] Usually, products are designed and developed at various levels, and FMECA is carried out at each product level. The analysis process of FMECA is derived from the...

AI Technical Summary

Problems solved by technology

However, for products with complex and comprehensive structures, using the traditional FMECA method, there are the following problems:

[0004] (1) FMECA between products at various levels is mostly isolated, no effective connection has been established, integrated risk analysis cannot be performed, and design coordination between products is lacking;

[0005] (2) The FMECA information of product design is too isolated and scattered, and the FMECA information of each product level comes from its own product design. The data information between each product level cannot be integrated, and there is a lack of integrated data integration ideas

For this large system, the traditional FMECA method can no longer intuitively analyze the impact of each hardware failure mode on the large system as a whole

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