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Method for evaluating risk of simulation system based on fuzzy FMEA

A simulation system and risk assessment technology, applied in the risk assessment field of simulation system, can solve problems such as result assessment not meeting the requirements, unreasonable cost allocation assessment, etc.

Inactive Publication Date: 2014-07-02
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention is to solve the problems of unreasonable cost allocation and assessment in the existing risk assessment method, the result assessment does not meet the requirements, and the qualitative assessment is based on human opinions and judgments, and provides a simulation system risk assessment method based on fuzzy FMEA

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  • Method for evaluating risk of simulation system based on fuzzy FMEA
  • Method for evaluating risk of simulation system based on fuzzy FMEA
  • Method for evaluating risk of simulation system based on fuzzy FMEA

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specific Embodiment approach 1

[0024] Specific implementation mode one: the fuzzy FMEA-based simulation system risk assessment method of the present implementation mode is realized according to the following steps:

[0025] 1. Preliminary assessment of the risk of the entire simulation system based on fuzzy FMEA, and obtained fuzzy results: very low VL, low L, medium M, high H and very high VL;

[0026] Two, use V j = ( V pj , V mj , V oj ) = N · CP · T j = ( N · CP m Σ i = 1 ...

specific Embodiment approach 2

[0045] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the preliminary assessment of the entire simulation system based on the fuzzy FMEA in the step one is specifically:

[0046] (1) Identify the failure mode of the simulation system, arrange the possible failures and set them as R1, R2....Rn;

[0047] (2) Carry out expert evaluation and classification rating to the severity S of each possible fault, the frequency of occurrence O of faults and the difficulty D of fault detection, and obtain the fuzzy results; wherein, the fuzzy results include Very low VL, low L, middle M, high H and very high VL, therefore, define word set S={VL, L, M, H, VH};

[0048] (3) The arithmetic mean of multiple expert evaluations, that is, the comprehensive evaluation value of multiple experts, is used as the risk assessment result of each fault. The formula is as follows:

[0049] F j ...

specific Embodiment approach 3

[0067] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is that: in the second step, the evaluation cost of the entire simulation system is estimated:

[0068] The first step is to determine the evaluation activities of the simulation system according to the risk assessment results of each failure of the simulation system in step 1;

[0069] In the second step, according to the risk assessment results of each failure of the simulated system in step 1 and the identified maximum acceptable risk R sim , asking for expert advice on possible assessment activities;

[0070] In the third step, for each possible evaluation activity, experts ensure the possible evaluation cost; wherein, the evaluation cost is a function of time, and time is expressed as a triplet T=(T p ,T m ,T o ); wherein, the T p is the pessimistic time, T o is the most likely time, T m to represent the time of optimistic value;

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Abstract

The invention relates to a method for evaluating the risk of a simulation system based on fuzzy FMEA, in particular to a method for evaluating the risk of the simulation system through fuzzy FMEA. The method aims to solve the problems that an existing method for evaluating the risk is unreasonable in cost allocation and evaluation, an evaluation result cannot meet requirements, and qualitative evaluation is based on opinions and judgment of people. The method includes the steps that firstly, the risk of the whole simulation system is preliminarily evaluated based on fuzzy FMEA, and then a fuzzy result is obtained; secondly, evaluation cost of the whole simulation system is estimated; thirdly, a calculation model of the risk and the cost of the whole simulation system is built; fourthly, the relation between fuzzy linear cost and the risk of the whole simulation system is evaluated, a fuzzy linear programming model of an evaluation solution is built, and then the final whole risk evaluation result is obtained. The method is applied to the field of risk evaluation.

Description

technical field [0001] The invention relates to the field of risk assessment, in particular to the risk assessment of a simulation system by using a fuzzy FMEA method. Background technique [0002] For more than half a century, modeling and simulation technology has developed into a relatively complete system of professional knowledge under the promotion and promotion of various application technologies and related disciplines. As a general and strategic technology, at present, building The characteristics of modeling and simulation technology are developing towards the modernization direction of "network virtualization, intelligence, collaboration, and generalization". It has been successfully applied in advanced high-tech industries such as aerospace, information, materials, energy, and manufacturing, and industrial , agriculture, education, transportation, society, economy, medicine, life, life services and many other fields. It is believed that modeling and simulation t...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘宇维邓中祚刘帅陈兴林庞博升周乃馨陈宇青
Owner HARBIN INST OF TECH
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