Application of Fuzzy Fault Tree Analysis in Aero-Engine

Abstract:

In view of the situation that the traditional fault tree is difficult to determine the probability of the basic events without considering the inherent uncertainly and imprecision of each basic event, the concept of fuzzy set is introduced which transforms various kinds of fuzzy numbers into triangular fuzzy ones to describe the probability of bottom events. Blurred the probability of the basic events in traditional fault tree, then the established fault tree is calculated and analyzed quantitatively, the fuzzy probability of top event of aero-engine can be gotten. The probability importance degree of each basic event under different sets is calculated and sorted for positioning the fault source precisely. Finally, the bottom events with higher probability will be obtained. The case analysis results show that the method gives a direct guiding significance for fault diagnosis of aero-engine, but also has a positive role for improving the reliability of the system.

• Periodical: Applied Mechanics and Materials (Volumes 602-605)
• Pages: 857-861
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.602-605.857
• Online since: August 2014
• Authors: Feng Ding*, Jun Qiang Dang, Jiu Cheng Yin
• Keywords: Aero-Engine, Fuzzy Fault Tree, Probability Importance Degree, Reliability

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