Analysis on Dynamic Fault Tree Based on Fuzzy Set

2011 ◽  
Vol 110-116 ◽  
pp. 2416-2420 ◽  
Author(s):  
Li Ping Yang
Keyword(s):  
Fuzzy Set ◽  
Fault Tree ◽  
Dynamic Logic ◽  
Fault Tree Analysis ◽  
Logic Gates ◽  
Minimum Cut ◽  
Tree Analysis ◽  
Dynamic Fault Tree ◽  
Large Complex System ◽  
Cut Set

In case of fault tree analysis of large complex system, the probability of bottom event in dynamic fault tree is uncertain in some cases. To address the problem, the paper presented a dynamic fault tree analysis method based on fuzzy set computation. The method separates logic attributes and timing attributes of dynamic logic gates. It can convert dynamic fault tree into static fault tree not considering timing constraints and obtain minimum cut set of static fuzzy fault tree with set operations, then the concept of minimum cut set is extended to dynamical minimum cut sequence. Thus, the dynamic fault tree was analyzed in both qualitative and quantitative aspects, which solve the problem that it is difficult to assign value of event probability in previously process.

Identification and Control of Hazard in Underground Blasting

2014 ◽  
Vol 926-930 ◽  
pp. 4097-4100
Author(s):  
Dong Tao Hu
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Minimum Cut ◽  
Underground Blasting ◽  
Tree Analysis ◽  
Cut Set ◽  
And Control

To prevent underground blasting accidents, fault tree analysis (FTA), a method for identifying and evaluating hazard in safety theory, is used to throughly analyze underground blasting technology. With calculating the minimum cut set and path set, causes of blasting accidents are determined. And corresponding preventions are formulated.

Fault Tree Analysis on Ship Dangerous Chemicals Leakage Emergency in Three Gorges Reservoir Area

2012 ◽  
Vol 610-613 ◽  
pp. 743-747
Author(s):  
Hai Yan Li ◽  
Guo Bin Wu
Keyword(s):  
Qualitative Analysis ◽  
Three Gorges Reservoir ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Three Gorges Reservoir Area ◽  
Minimum Cut ◽  
Three Gorges ◽  
Tree Analysis ◽  
Minimum Path ◽  
Cut Set

This paper conducts the fault tree analysis on Ship Dangerous Chemicals Leakage emergency of Three Gorges Lock with the method of safety system engineering, draws a map of fault tree analysis, representing intuitively the basic events which can bring about top events as well as the logic relationships between them, obtains the minimum cut set, minimum path set and structure importance through qualitative analysis of FTA, and points out the possible ways to prevent the occurrence of accidents.

scholarly journals Reliability Evaluation of Data Communication System Based on Dynamic Fault Tree under Epistemic Uncertainty

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Rongxing Duan ◽  
Jinghui Fan
Keyword(s):  
Set Theory ◽  
Fuzzy Set ◽  
Fuzzy Set Theory ◽  
Communication System ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Data Communication ◽  
Tree Analysis ◽  
Dynamic Fault Tree ◽  
Evaluation Of Data

Fault tree analysis is a well-structured, precise, and powerful tool for system evaluation. However, the conventional approach has been found to be inadequate to deal with the absence of fault data, failure dependency, and uncertainty problems. This paper presents a comprehensive study on the evaluation of data communication system (DCS) using dynamic fault tree approach based on fuzzy set. It makes use of the advantages of the dynamic fault tree for modelling, fuzzy set theory for handling uncertainty, and Bayesian network (BN) for inference ability. Specifically, it adopts expert elicitation and fuzzy set theory to evaluate the failure rates of the basic events for DCS and uses a dynamic fault tree model to capture the dynamic failure mechanisms. Furthermore, some reliability parameters can be calculated by mapping a dynamic fault tree into an equivalent BN. The results show that the proposed method is more flexible and adaptive than conventional fault tree analysis for fault diagnosis and reliability estimation of DCS.

Dynamic Fault Tree Analysis

2020 ◽  
pp. 73-112
Author(s):  
Koorosh Aslansefat ◽  
Sohag Kabir ◽  
Youcef Gheraibia ◽  
Yiannis Papadopoulos
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Dynamic Fault Tree

FTAe – Fault Tree Analysis in Microsoft Excel

2014 ◽  
Vol 889-890 ◽  
pp. 591-594
Author(s):  
Richard Kuracina ◽  
Denis Šandor ◽  
Karol Balog
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Software Tool ◽  
Short Description ◽  
Microsoft Excel ◽  
Tree Analysis ◽  
Minimal Cut Sets ◽  
Minimal Cut ◽  
Cut Set

FTAe is software tool for Fault Tree Analysis in Microsoft Excel. This paper is focused on short description of created FTAe. A brief description of Fault Tree Analysis is in the first part of paper. The Structure, Logic and Minimal Cut Sets in Fault Tree analysis is described too. Next part of this paper is focused on the choice of algorithm for cut set calculation and brief description of structure of FTAe. Finally, advantages of FTAe software in Microsoft Excel are described in conclusions.

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