基于故障树分析和贝叶斯网络方法的液压举升机构故障诊断  

Fault Diagnosis of Hydraulic Lifting Mechanism Based on Fault Tree Analysis and Bayesian Network Method

作　　者：邹树梁 陈树强 ZOU Shuliang;CHEN Shuqiang(School of Resources Environmental and Safety Engineering, University of South China, Hengyang, Hunan 421001, China;Key Laboratory of Hunan Province of Nuclear Emergency of Safety Technology & Equipment, University of South China, Hengyang, Hunan 421001, China)

机构地区：[1]南华大学资源环境与安全工程学院,湖南衡阳421001 [2]核设施应急安全技术与装备湖南省重点实验室,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2021年第4期62-67,共6页Journal of University of South China：Science and Technology

基　　金：甘肃省重点研发计划项目(17JR7GA001)。

摘　　要：为应对液压举升机故障原因复杂,诊断方法准确性不高等问题,提出一种基于故障树和贝叶斯网络的液压举升机故障诊断方法。首先建立液压举升机构故障树,然后将故障树转换为贝叶斯网络,利用三角模糊函数表示举升机底事件发生概率,得到底事件模糊概率,将其做为先验概率计算叶节点发生概率,进而求得根节点后验概率以及概率重要度,可快速诊断出故障点。In order to deal with the problems of complicated faults of hydraulic lifts and low accuracy of diagnosis methods,a fault diagnosis method of hydraulic lifts based on fault tree and Bayesian network is proposed.Firstly,the fault tree of hydraulic lifting mechanism is established,and then the fault tree is converted into a Bayesian network.The triangular fuzzy function is used to express the probability of the bottom event of the lift,and the fuzzy probability of the bottom event is obtained,which is used as the prior probability to calculate the occurrence of the leaf node probability,and then the posterior probability of the root node and the probability importance is obtained,which can quickly diagnose the fault point.

关 键 词：液压举升机 贝叶斯网络 故障树分析 三角模糊函数 

分 类 号：TH137[机械工程—机械制造及自动化]