Method for analyzing reliability of standby redundant system on basis of fault tree

A fault tree analysis and redundant system technology, applied in the field of data analysis, can solve problems such as inaccurate system reliability prediction and failure path description, system reliability management uncertainty, etc.

Active Publication Date: 2018-08-10
HARBIN ENG UNIV
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Problems solved by technology

[0003] At this stage, the fault tree analysis commonly used in the nuclear industry does not distinguish between the two designs, but analyzes and calculates them as a parallel redundancy, which will lead to inaccurate system reliability prediction and failure path description, which will affect the system reliability. Management creates uncertainty

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  • Method for analyzing reliability of standby redundant system on basis of fault tree
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  • Method for analyzing reliability of standby redundant system on basis of fault tree

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[0082] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0083] The embodiment of the present invention provides a method for analyzing the reliability of a bypass redundant system based on a fault tree. The premise of this method is that there are two assumptions: 1) The failure of equipment is independent of each other, that is, the failure of one equipment does not affect the failure of other equipment Pro...

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Abstract

The invention discloses a method for analyzing reliability of a standby redundant system on the basis of a fault tree. The method comprises: establishing a fault tree model of the standby redundant system; carrying out qualitative analysis on the established fault tree; on the basis of a qualitative analysis result, carrying out quantitative analysis on the fault tree. When the fault tree model ofthe standby redundant system is established, according to a system-subsystem-equipment-equipment failure mode sequence, a system-redundant row model, a sequence failure group and a model of a sequence dependence relationship among redundant rows, equipment and equipment failure modes are sequentially established, and each equipment failure mode is completely analyzed and used as a lowermost layerevent. According to the fault tree modeling and analysis method disclosed by the invention, a more real system failure path is described, a system failure probability is subjected to more accurate quantitative evaluation, the unnecessary conservative property possibly introduced in an original fault tree method is eliminated, and more accurate estimation on the reliability level of the system isimplemented.

Description

technical field [0001] The invention relates to the technical field of data analysis, in particular to a method for analyzing the reliability of a bypass redundancy system based on a fault tree. Background technique [0002] The fault tree analysis method is a system reliability evaluation method widely used in the nuclear industry. It can quantitatively evaluate the reliability level of the system, and can qualitatively describe the path of system failure (that is, the human error or equipment failure that leads to system failure). failure combination). Redundant design, that is, redundant functional modules that set redundant system capability requirements for a function, is a common design measure for nuclear power plants to improve their system reliability. According to the input time and control mode of the redundant units, the redundant system can be divided into parallel redundant and bypass redundant. Under the same resource configuration (such as the same equipment...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 张敏张志俭张华志陈思娟王贺马颖菲徐安琪
Owner HARBIN ENG UNIV
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