基于模糊故障树和灰色关联算法的CASS污水系统分析  

CASS sewage system analysis based on fuzzy fault tree and grey correlation algorithm

作　　者：鲁明 吴志光[1] LU Ming;WU Zhiguang(Department of Mechatronics and Automobile,Chizhou Vocational and Technical College,Chizhou 247000,China)

机构地区：[1]池州职业技术学院机电与汽车系,安徽池州247000

出　　处：《山东理工大学学报（自然科学版）》2022年第5期44-49,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：安徽省高校自然科学研究项目(KJ2018A0187);池州职业技术学院院级自然重点项目(ZR2019Z02)。

摘　　要：针对故障树分析法在处理污水系统故障时不能获取全部故障信息和故障发生概率的局限性,提出一种基于模糊理论和灰色关联算法相结合的故障树分析方法。利用故障树分析法求解影响污水系统故障的所有最小割集,利用三角模糊函数表示底事件的发生概率,得到底事件的模糊概率;计算出顶事件的模糊概率和各底事件的模糊重要度,将处理好的数据代入灰色关联模型,计算出各最小割集与顶事件之间的灰色关联度;对事件的灰色关联度进行排序,找出该系统的薄弱环节,提出改进措施。该方法基本解决了由于故障信息的缺失而导致的污水系统故障问题,与污水处理厂实际获取的数据相符。In view of the limitation that the fault tree analysis(FTA)cannot obtain all fault information and fault occurrence probability when dealing with sewage system faults,a fault tree analysis method based on the combination of fuzzy theory and grey correlation algorithm is proposed.Specifically,the fault tree analysis method is used to solve all the minimum cut sets affecting the fault of sewage system.The triangular fuzzy function is used to represent the occurrence probability of the bottom event,and the fuzzy probability of the bottom event is obtained.The fuzzy probability of the top event and the fuzzy importance of each bottom event are calculated.The processed data are then introduced into the grey correlation model to calculate the grey correlation degree between the minimum cut set and the top event,sort the grey correlation degree of the event,find out the weak links of the system,and propose improvement measures.The method basically solves the fault problem of the sewage system caused by the lack of fault information,which is consistent with the data obtained by the actual sewage treatment plant.

关 键 词：灰色关联分析 故障树 三角模糊数 污水处理系统 

分 类 号：TV213.4[水利工程—水文学及水资源]