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Railway conduction interference fault tree analysis method

A technology of fault tree analysis and conduction interference, which is applied to other database retrieval, resources, instruments, etc., can solve the problems of complex minimum cut set calculation, inaccurate fault analysis, and insufficient depth of fault tree analysis

Active Publication Date: 2020-10-02
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the analysis of the fault is not accurate, the exact cause of the fault cannot be obtained.
However, the fault tree analysis method often brings great uncertainty to the artificial analysis, and the analysis of the relationship between the fault tree is not deep enough, and the calculation of the minimum cut set is too complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: On the other hand, if it is necessary to establish a conduction interference fault tree, start from the top layer to determine the conduction interference fault of the top event of the system, that is, under what conditions and what kind of fault the system occurs, the fault should be clearly described , otherwise the established fault tree will be inaccurate, so the analysis of the fault will not be accurate, and the exact cause of the fault will not be obtained. After determining the top event, find the direct cause of the failure.

[0020] Because the three elements of conduction interference are the necessary conditions for the occurrence of conduction interference faults, a fault tree can be built downwards, and the top event equipment fault and the three elements of conduction interference, interference source, channel and sensitive equipment can be connected by AND gate, so far the second layer of faults The tree is built. Interference sources incl...

Embodiment 2

[0027] Embodiment 2: The so-called electromagnetic compatibility fault tree diagnosis method, which is to apply the fault tree method to the electromagnetic compatibility problem for analysis and diagnosis. Electromagnetic compatibility faults appear as interference pairs, that is, interference sources and sensitive equipment appear in pairs, and there is a propagation path between the two. If it is to measure the electromagnetic compatibility index or similar, the measuring sensor is the receiver or the spectrum analyzer, and if it exceeds the standard, it is a failure. The interference sources of the measurement are various signal sources, and the occurrence of sensitivity is a fault. Based on the above analysis, the factors that cause electromagnetic compatibility failures include interference sources, transmission routes, and sensitive equipment. From the fault tree analysis, the three elements can be included in the content of the fault tree analysis.

[0028] Summary o...

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Abstract

The invention relates to a railway conduction interference fault tree analysis method. The method comprises three steps: establishing a railway conduction interference fault tree, performing structured statistics on the fault tree, constructing a BDD form of the fault tree, and solving a minimum cut set of the fault tree. According to the method, the structure of the fault tree is split; statistics is carried out on the structuralization; and finally, a minimum cut set is solved; in the process, the structured statistics is not only used for counting the structured characteristics of the faulttree, but also used for directly relating the event sorting of the fault tree to the sorting of the events in the BDD structure converted by the fault tree, so the compactness of the structure is determined, and the path cost in the minimum cut set conversion process of the fault tree is saved.

Description

technical field [0001] The invention relates to the field of railway electromagnetic compatibility, and relates to a fault tree analysis method for railway conduction interference. Background technique [0002] The traditional method of building a fault tree analysis method for railway conducted interference starts from the top layer to determine the conducted interference fault of the top event in the system, that is, what kind of fault occurs under what conditions the system has. Then, try to describe the fault clearly, in order to ensure the accuracy of the established fault tree. Therefore, if the analysis of the fault is not accurate, the exact cause of the fault cannot be obtained. However, the fault tree analysis method often brings great uncertainty to the artificial analysis, and the analysis of the relationship of the fault tree is not deep enough, and the calculation of the minimum cut set is too complicated. Contents of the invention [0003] In view of this,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/901G06F16/903G06Q10/06G06Q50/30
CPCG06F16/9027G06F16/90335G06Q10/06393G06Q50/40Y02T90/00
Inventor 刘雪明孙平穆晓彤李鸷商宝莹宋季磊
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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