A Calculation Method for Risk Priority Number Analysis of Complex System Considering Weight and Correlation

A risk priority number and complex system technology, applied in the field of risk priority number analysis and calculation of complex systems, can solve rare problems, achieve universal applicability, reasonable and reliable results, and reduce errors

Active Publication Date: 2022-03-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

At present, the Copula function has been widely used in the fields of finance and hydrology, and its effectiveness has been widely proved. However, the Copula function is relatively rare in the analysis and calculation of risk priority numbers.

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  • A Calculation Method for Risk Priority Number Analysis of Complex System Considering Weight and Correlation
  • A Calculation Method for Risk Priority Number Analysis of Complex System Considering Weight and Correlation
  • A Calculation Method for Risk Priority Number Analysis of Complex System Considering Weight and Correlation

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Embodiment Construction

[0022] In order to facilitate those skilled in the art to understand the technical content of the invention, the content of the invention will be further elaborated below in conjunction with the accompanying drawings.

[0023] The present invention introduces the Copula function in the risk priority number analysis and calculation process, and proposes a new method for calculating the risk priority number of complex systems considering weights and correlations, so as to solve the problem that the existing methods fail to consider the S, O, D weights and the bottom event correlation At the same time, the existing RPN method only considers the single point of failure, which makes it difficult to apply to large and complex systems. Because the weight of risk factors and the correlation of bottom events are considered, the results obtained by the method of the invention are more reasonable and reliable, and have good universality and good engineering application value.

[0024] Su...

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Abstract

The invention discloses a risk priority number analysis and calculation method of a complex system considering weight and correlation. The invention determines the structure of the system and the failure modes of components by analyzing the composition and function of the system; determines the minimum cut set of the system; according to the analysis The goal and the basic principle of AHP draw the system hierarchical structure diagram; single-level sorting, determine the weight of risk factors S, O, D on the highest level; single-level sorting, respectively determine the minimum cut set at the bottom level and the middle level S, O , the weight of D; the level total ordering of the risk priority number of the minimum cut set; the risk analysis results are sorted from large to small, and are used to guide product analysis and design. The present invention uses AHP and pairwise comparison methods to solve each At the same time, the Copula function is used to model the correlation of the bottom event, which reduces the error caused by the independence assumption, so that the obtained results are more reasonable and reliable.

Description

technical field [0001] The invention belongs to the fields of reliability engineering and risk analysis, and in particular relates to a method for analyzing and calculating complex system risk priority numbers considering weight and correlation. [0002] technical background [0003] With the rapid development of science and technology, equipment and systems are becoming larger, more complex and more intelligent. Reliable and safe operation of equipment and systems is very important. Once a failure occurs, it will lead to varying degrees of economic losses and cause heavy casualties. Therefore, the evaluation of the reliability and safety of large equipment and complex systems is extremely important. There are a variety of system reliability and risk analysis and evaluation methods, such as FMEA (Failure Mode and Effect Analysis), FTA (Fault Tree Analysis), RPN (Risk Priority Number), etc. Among them, FMEA is to analyze the potential failure modes of each component unit of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/02
Inventor 肖宁聪王强詹红有谢国丰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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