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Determining method of criticality of fault mode of rail transit vehicle component

A technology of rail transit vehicles and failure modes, applied in the field of traffic safety engineering, can solve the problems of rationality of decision-making, can not consider the maximization of group utility at the same time and minimize individual regrets, and does not fully consider the subjective preferences of decision makers, etc., to achieve decision-making. More rational and avoid cumbersome effects

Inactive Publication Date: 2014-07-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, all the above multi-objective decision-making methods have some problems. For example, the TOPSIS method cannot reflect the closeness of each plan to the positive and negative ideal solutions, the PROMETHEE method only considers the maximization of group utility, and the ELECTRE method pursues the minimization of individual regret. , none of the above methods can consider the maximization of group utility and the minimization of individual regret at the same time, and does not fully consider the subjective preference of the decision maker, so there is a problem with the rationality of the decision

Method used

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  • Determining method of criticality of fault mode of rail transit vehicle component
  • Determining method of criticality of fault mode of rail transit vehicle component
  • Determining method of criticality of fault mode of rail transit vehicle component

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Embodiment 1

[0051] combine image 3 According to the fuzzy theory, the linguistic variables of the evaluation grades of the three risk factors O, severity S and difficulty D of the urban rail vehicle failure mode and the corresponding relationship between the risk factor weight and the trapezoidal fuzzy number are obtained, respectively, as shown in Table 1 and Table 2 shows.

[0052] Table 1 Evaluation Index Linguistic Variables and Trapezoidal Fuzzy Numbers

[0053]

[0054] Table 2 Factor weight linguistic variables and trapezoidal fuzzy numbers

[0055]

[0056] Taking the electric control device of the subway door system as the research object, the failure mode hazard analysis team of the door system components is composed of 5 experts from different departments such as design, assembly and maintenance. They are respectively given the same weight, and 13 electric control devices are selected. The common failure modes are shown in Table 3, and the risk factors of each failure ...

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Abstract

The invention discloses a determining method of the criticality of a fault mode of a rail transit vehicle component. The determining method of the criticality of the fault mode of the rail transit vehicle component comprises the following steps that firstly, estimation scales of risk factors of the fault mode of the rail transit vehicle component are built; secondly, K analysis members are selected for carrying out fuzzy evaluation on the risk factors of the fault mode of the selected vehicle component, a fuzzy decision matrix of the risk factors is obtained, and clear values of the risk factors of the fault mode are obtained according to the gravity center defuzzification method; then a positive ideal solution and a negative ideal solution of the risk factors of the fault mode are determined according to cost indexes of the risk factors, and an optimal solution and a worst solution of the fault mode are obtained; finally, the criticality value of the fault mode is determined according to the optimal solution and the worst solution, and the criticality of the fault mode is determined according to the relation between the criticality value and the optimal solution value and the relation between the criticality value and the worst solution value. The method is combined with the fuzzy theory and the multi-attribute VIKOR decision-making method to determine the criticality of the fault mode, the steps are simple, calculation is small, and the multi-attribute decision-making in the evaluation of the criticality of the fault mode is achieved.

Description

technical field [0001] The invention belongs to the technical field of traffic safety engineering, in particular to a method for determining the hazard degree of failure modes of rail transit vehicle components. Background technique [0002] The safety of urban rail transit operation has always been highly valued and closely watched by governments at all levels and the general public. As a direct carrier of passengers, the safety of subway vehicles is directly related to the safety of passengers. In recent years, the complexity of subway vehicle equipment has continued to increase, and the failure rate has continued to increase. How to efficiently, quickly and accurately analyze the hazards of its failure modes for vehicle equipment is an important issue worth studying. [0003] Scholars have done a lot of research in the analysis of failure mode hazards. Zou Yaling of Beijing Jiaotong University used the TOPSIS method to construct a multi-attribute decision-making maintenan...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 任金宝吴智伟黄旋西麻薇
Owner NANJING UNIV OF SCI & TECH
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