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Application of cloud model fuzzy analytical hierarchy process in risk analysis of railway signal system

A fuzzy level, railway signal technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unobjective and unreliable results

Inactive Publication Date: 2014-10-15
LANZHOU JIAOTONG UNIV
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Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of assessment method that is applied to the field of risk analysis of railway signal system, which solves the problem of using conventional fuzzy analytic hierarchy process to make comprehensive decision-making by utilizing the maximum degree of membership principle or weighted average method in the prior art scheme. The risk assessment of equipment will make the results unobjective and unreliable

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  • Application of cloud model fuzzy analytical hierarchy process in risk analysis of railway signal system
  • Application of cloud model fuzzy analytical hierarchy process in risk analysis of railway signal system
  • Application of cloud model fuzzy analytical hierarchy process in risk analysis of railway signal system

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Embodiment 1

[0134] Embodiment 1: The present invention takes the temporary speed limit function of the railway signal system equipment train control center as an example, and conducts risk analysis on it. We use a cloud model to describe these four risk levels, thereby replacing fixed values ​​to construct membership functions. Calculate the evaluation values ​​of the four risk assessment levels according to the formula, and obtain the risk assessment level based on the cloud model. Combine the four evaluation standards, and use the field data survey method to investigate the actual use of equipment on site and historical maintenance data to score. The evaluation vector of six risk factors for the temporary speed limit function of the train control center. Based on the results of the expert survey method and the field data survey method, the expectation, entropy and hyper-entropy of each failure mode can be obtained by using the reverse cloud generator calculation, thus forming a comprehe...

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Abstract

The invention discloses an evaluation method applied to the field of risk analysis of a railway signal system. The method comprises the steps of firstly, formulating the levels of risk of the railway system, expressing a cloud model for evaluating the levels of risk by a forward cloud generator of a MATLAB simulation software, and generating a standard risk grade evaluation set cloud model figure; marking the failure mode of a function by an expert according to the formulated levels of risk to obtain a risk factor set, and converting the risk factor set into a comprehensive evaluation matrix R; utilizing an analytic hierarchy process to obtain risk factor set weight coefficients corresponding to all parameters in the risk factor set by the expert, and calculating a comprehensive evaluation result cloud model figure by fuzzy synthetic operator; comparing the comprehensive evaluation result cloud model figure with the standard risk grade evaluation set cloud model figure to obtain the level of risk of the comprehensive evaluation result. After the method is adopted, the risk evaluation result is more objective and accurate.

Description

technical field [0001] The invention belongs to the technical field of risk analysis of railway signal systems, and relates to the application of cloud model fuzzy analytic hierarchy process in risk analysis of railway signal systems. Background technique [0002] Cloud Model: proposed by Li Deyi, an academician of the Chinese Academy of Engineering, is an uncertain conversion model that deals with qualitative concepts and quantitative descriptions. Fuzzy Analytic Hierarchy Process (FAHP): A method that comprehensively uses Analytic Hierarchy Process and fuzzy comprehensive evaluation method to solve multi-factor and multi-index evaluation problems. Fuzzy analytic hierarchy process is one of many risk assessment methods. Its basic idea is to use the principle of fuzzy linear transformation and the principle of maximum membership degree, consider various factors related to the evaluated thing, and make a reasonable comprehensive evaluation of it. Since some risk factors cann...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 张友鹏徐征捷苏宏升赵斌董海燕
Owner LANZHOU JIAOTONG UNIV
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