国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In order to find out the aviation engine oil leakage reasons, research the fuzzy Fault Tree Analysis (FTA) theory application in fault diagnosis. CFM56-7B engine oil system is taken as the research object, the fault tree analysis theory is adopted to oil leakage fault diagnosis, downlink method is put forward to solve the minimal cut sets and obtained fault incentives minimum event. Considering the fuzzy and uncertain characteristics of oil failure, fuzzy mathematical theory combined with Delphi expert survey is used for quantitative analysis to determine the fault cause event risk degree. From the CFM56-7B oil leaking causes sort importance, the close sump oil filler cap damage (x₁), the close sump oil return pipe joints crack (x₂), seal material damage after use MJO291 oil (x₈), etc lead to engine oil leakage, which should pay more attention. The maintenance unit fault records verify the validity of the methods, which provide a reference for accurate and rapid diagnosis and exclude oil leakage fault.