液压系统模糊故障树分析方法研究  

Research on Fuzzy Fault Tree Analysis Method of Hydraulic System

作　　者：姚成玉[1] 赵静一[1] 

机构地区：[1]燕山大学,秦皇岛066004

出　　处：《中国机械工程》2007年第14期1656-1659,1675,共5页China Mechanical Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(20050216004);燕山大学博士基金资助项目(B214)

摘　　要：针对液压系统底事件和中间事件发生概率情况获取不足的现状,将模糊集合论和可能性理论引入故障树分析法中,将事件发生概率描述为模糊数和模糊可能性,提出了一种基于梯形模糊数算术运算的液压系统故障树分析方法,并结合压装机液压系统的“主缸快进无法实现”故障树分析应用实例,估计了出顶事件的故障概率和各底事件的模糊重要度。In order to overcome the disadvantages of insufficient fault probabilities of the bottom and intermediate events, fuzzy set theory and possibility theory were introduced into fault tree analysis method, probabilities of the events were described as fuzzy numbers and fuzzy possibilities, the fault tree analysis method of hydraulic system was proposed based on arithmetic operation of trapezoidal fuzzy numbers. An example of fault tree analysis of ＂main cylinder＇s failure to accomplish fast forward step＂of the hydraulic system for the assembling press was given for illustration, where fault probability of top event and fuzzy importance degrees of bottom events are achieved.

关 键 词：压装机 液压系统 故障树分析 模糊集合理论 可能性理论 

分 类 号：TH137.7[机械工程—机械制造及自动化]