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Fault tree analysis of fuzzy mechanical systems
Microelectronics Reliability, 1994Abstract The fault tree techniques involve the decomposition of a system into a logic diagram or fault tree in which certain primary events lead to a specified top event that signifies the total failure of the system. The fault trees can be used to find the minimal cut sets which, when coupled with the failure rates of the primary events, lead to an ...
James P. Sawyer, S.S. Rao
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Fuzzy fault tree analysis of mask stage
2012 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, 2012Fault tree analysis (FTA) is a top-down approach for failure analysis, starting with a potential undesirable event called a TOP event, and then determining all the ways it can happen. FTA is the most commonly used technique for causal analysis in risk and reliability studies. Mask stage an important part of lithography. In this paper, Fault Tree of the
Jidong Zeng +4 more
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Fault tree analysis based on TOPSIS and triangular fuzzy number
International Journal of System Assurance Engineering and Management, 2014Fault tree analysis (FTA) is widely used in the failure probability evaluation of a system. The conventional failure probabilities of basic events are treated as crisp values. However, in many real applications, it is often difficult to evaluate failure probabilities of basic events from past occurrences.
Hongping Wang +5 more
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Fault tree analysis based on fuzzy logic
Computers & Chemical Engineering, 1990Abstract This paper considers the relative frequencies of basic events determining the safety of such a system as fuzzy numbers and uses instead of probabilistic possibilistic considerations for evaluating the mean values and the tolerances for the frequency of head events. Using standard approximations for the membership function expressions for the
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Failure probability analysis by employing fuzzy fault tree analysis
International Journal of System Assurance Engineering and Management, 2017A significant number of accidents occur every year in chemical plants because of the failure of components. In order to manage this risk, fault tree analysis (FTA), a well-known method, was employed for failure probability analysis in the mentioned field. A complete access to the failure data is vital for quantitative FTA. There is always a shortage of
Mohammad Yazdi +2 more
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GIS reliability analysis based trapezoid fuzzy fault tree
2010 18th International Conference on Geoinformatics, 2010GIS reliability refers to the ability to complete the requirements under the specified conditions and time. In this paper, there are five elements including object, conditions of use, use of time, functions and capabilities, to evaluate GIS reliability proposed by the combination in a engineering GIS.
Shengwu Hu, Xiaosan Ge
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Fuzzy grey fault tree analysis on diesel engine reliability
2010 Seventh International Conference on Fuzzy Systems and Knowledge Discovery, 2010The minimal cut sets and structure importance of bottom event are achieved by top-down method on diesel engine system downtime failures. The method of combining grey relational analysis with fuzzy membership function is presented to solve the probability of failure modes. Fuzzy grey fault tree model is proposed.
Yong-hua Li 0002 +2 more
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Grey relation analysis on fuzzy fault tree of disk brake
Proceedings of 2011 International Conference on Electronic & Mechanical Engineering and Information Technology, 2011The fault states are fuzzy and the relationship between the primary and the secondary factor leading to the fault is uncertain in the course of the reliability analysis of disk brake. To solve these problems, the fuzzy grey relation analysis is used to improve the traditional method, Fault Tree Analysis (FTA).
Dezhong Ma +4 more
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Method of fuzzy fault tree analysis
2008This paper presents the possibility of extension of the classical fault tree analysis FTA with the fuzzy fault tree analysis FFTA. The integration of the FFTA within the tree fault is presented as well as the example of the simulation of the fuzzy sets basic events with affiliated functions of affiliation.
Čala, Ivo +2 more
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Fuzzy Fault Tree Analysis : Case Studies
1995Estimation of the fuzzy probability of occurrence of an hazardous event (such as: accidental release of chemicals) taking recourse to Fuzzy Sets Theory (FST) is the topic of immediate relevance in Probabilistics Risk Assessment for Chemical Industry.
A. W. Deshpande, P. Khanna
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