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A reliability assessment method of common cause failure system considering environmental factors

A technology of environmental factors and reliability, applied in special data processing applications, instruments, probability networks, etc., can solve problems such as errors in reliability evaluation methods

Inactive Publication Date: 2018-12-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a common cause failure system reliability assessment method considering environmental factors, which solves the problem that the reliability assessment method of the existing common cause failure system has large errors

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  • A reliability assessment method of common cause failure system considering environmental factors
  • A reliability assessment method of common cause failure system considering environmental factors
  • A reliability assessment method of common cause failure system considering environmental factors

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Embodiment Construction

[0029] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0030] The actual engineering system of the present invention is as figure 2 As shown, the system S consists of two key components A with the same functional structure 1 、A 2 Composed in series, their failures obey the exponential distribution, and the two key components will be affected by the same environmental stress, so there is a common cause failure phenomenon. There are non-critical components N in the system, the...

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Abstract

The invention discloses a common cause failure system reliability evaluation method considering environmental factors. The invention fully takes into account the common cause failure and failure ratevariation of the modern complex system due to the characteristics of the multi-task section, the complex environment and the multi-components. Therefore, the present invention has more engineering value than the traditional system reliability evaluation method which assumes that the component failure is independent and is not affected by the environment. At the same time, the invention uses the dynamic Bayesian network modeling method, which can reasoning the complex system, so that the method is applicable to the reliability evaluation of the large-scale complex system.

Description

technical field [0001] The invention relates to the technical field of system reliability engineering, in particular to a method for evaluating the reliability of a common cause failure system considering environmental factors. Background technique [0002] Common cause failure (Common Cause Failure, CCF) is a kind of problem that is often encountered in practical engineering systems. It refers to the simultaneous failure of two or more units in a system due to some common reason. The main feature is the correlation of failures. For some systems, the failure process of its components is often correlated, and the failure correlation of common cause failure is an important reason for the failure correlation of various parts in the system. Most of the existing research on reliability evaluation methods is based on the assumption that the failures of system components are independent of each other, ignoring the correlation of failures of system components, and simply performing...

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Application Information

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IPC IPC(8): G06F17/50G06N7/00
CPCG06F30/20G06N7/01
Inventor 黄洪钟刘洋黄鹏李彦锋王琪瑞丁如昌曾颖
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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