Importance Analysis Method of Fuzzy Fault Tree Based on T-S Modle and Application in Hydraulic System

Zhang, Lu Lu; Zhang, Rui Jun; Xin, Xin

doi:10.4028/www.scientific.net/amm.470.707

Cited by 2 publications

(2 citation statements)

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“…e T-S fuzzy fault tree and Bayesian network method are transformed to make a reasonable evaluation of the reliability of tunnel collapse, which provides a method for the safety construction decision of tunnel [19]. In order to overcome the deficiency of dealing with the uncertainty of fuzzy information and fault logic relationship in the traditional importance measurement, the T-S fuzzy importance analysis method is proposed and applied to the importance analysis of the hydraulic system, which proves the feasibility of the algorithm [20].…”

Section: Introductionmentioning

confidence: 99%

“…In [17][18][19], only the reliability analysis of the system was carried out, and the influence of a single bottom event fault on the top event was not judged. In [20], importance was applied to analyze the bottom events, but it cannot reflect the change of importance over time. In this study, the continuous-time T-S dynamic fault tree is used to analyze the reliability of the hydraulic system of the tape winding machine.…”

Section: Introductionmentioning

confidence: 99%

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Reliability Analysis of Tape Winding Hydraulic System Based on Continuous-Time T-S Dynamic Fault Tree

Sun

Jiang

et al. 2022

Mathematical Problems in Engineering

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It is necessary to make the tape winding system have good reliability. Because the power system usually is a pneumatic or hydraulic system, the static reliability analysis lacks the ability to describe the dynamic state transfer, component fault correlation, and propagation effect of the system; it is difficult to accurately reflect the actual behavior of the complex system. Most of the existing research results lack the situation that the importance of bottom events changes with time; only a single number cannot express the impact of bottom events on top events at different times. Therefore, this study uses the dynamic reliability analysis method to quantitatively analyze the reliability of the tape winding power hydraulic system. Firstly, the dynamic reliability model of hydraulic system is established by using the continuous-time T-S dynamic fault tree to solve the fault rate of the system. Secondly, the results are compared with the traditional Markov chain analysis method of dynamic fault tree. The feasibility and advantages of the continuous-time T-S dynamic fault tree analysis method are verified. Finally, the probability importance and key importance of the system unit are calculated, and the law of importance changing with time is expressed. According to the importance of different time, it can help the regular maintenance and fault diagnosis of equipment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of Tape Winding Hydraulic System Based on Continuous-Time T-S Dynamic Fault Tree

Sun

Jiang

et al. 2022

Mathematical Problems in Engineering

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A review of applications of fuzzy sets to safety and reliability engineering

Kabir

Papadopoulos

2018

International Journal of Approximate Reasoning

142

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Safety and reliability are rigorously assessed during the design of dependable systems. Probabilistic risk assessment (PRA) processes are comprehensive, structured and logical methods widely used for this purpose. PRA approaches include, but not limited to Fault Tree Analysis (FTA), Failure Mode and Effects Analysis (FMEA), and Event Tree Analysis (ETA). In conventional PRA, failure data about components is required for the purposes of quantitative analysis. In practice, it is not always possible to fully obtain this data due to unavailability of primary observations and consequent scarcity of statistical data about the failure of components. To handle such situations, fuzzy set theory has been successfully used in novel PRA approaches for safety and reliability evaluation under conditions of uncertainty. This paper presents a review of fuzzy set theory based methodologies applied to safety and reliability engineering, which include fuzzy FTA, fuzzy FMEA, fuzzy ETA, fuzzy Bayesian networks, fuzzy Markov chains, and fuzzy Petri nets. Firstly, we describe relevant fundamentals of fuzzy set theory and then we review applications of fuzzy set theory to system safety and reliability analysis. The review shows the context in which each technique may be more appropriate and highlights the overall potential usefulness of fuzzy set theory in addressing uncertainty in safety and reliability engineering.

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Importance Analysis Method of Fuzzy Fault Tree Based on T-S Modle and Application in Hydraulic System

Cited by 2 publications

References 4 publications

Reliability Analysis of Tape Winding Hydraulic System Based on Continuous-Time T-S Dynamic Fault Tree

Reliability Analysis of Tape Winding Hydraulic System Based on Continuous-Time T-S Dynamic Fault Tree

A review of applications of fuzzy sets to safety and reliability engineering

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