A Multi-level Approach for Complex Fault Isolation Based on Structured Residuals  

复杂故障判定的基于结构化残差的多层次分析法(英文)

作　　者：叶鲁彬 石向荣 梁军 

机构地区：[1]State Key Laboratory of Industrial Control Technology,Institute of Industrial Control Zhejiang University

出　　处：《Chinese Journal of Chemical Engineering》2011年第3期462-472,共11页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(60574047);the National High Technology Research and Development Program of China(2007AA04Z168,2009AA04Z154);the Research Fund for the Doctoral Program of Higher Education in China(20050335018)

摘　　要：In industrial processes,there exist faults that have complex effect on process variables.Complex and simple faults are defined according to their effect dimensions.The conventional approaches based on structured residuals cannot isolate complex faults.This paper presents a multi-level strategy for complex fault isolation.An extraction procedure is employed to reduce the complex faults to simple ones and assign them to several levels.On each level,faults are isolated by their different responses in the structured residuals.Each residual is obtained insensitive to one fault but more sensitive to others.The faults on different levels are verified to have different residual responses and will not be confused.An entire incidence matrix containing residual response characteristics of all faults is obtained,based on which faults can be isolated.The proposed method is applied in the Tennessee Eastman process example,and the effectiveness and advantage are demonstrated.In industrial processes,there exist faults that have complex effect on process variables.Complex and simple faults are defined according to their effect dimensions.The conventional approaches based on structured residuals cannot isolate complex faults.This paper presents a multi-level strategy for complex fault isolation.An extraction procedure is employed to reduce the complex faults to simple ones and assign them to several levels.On each level,faults are isolated by their different responses in the structured residuals.Each residual is obtained insensitive to one fault but more sensitive to others.The faults on different levels are verified to have different residual responses and will not be confused.An entire incidence matrix containing residual response characteristics of all faults is obtained,based on which faults can be isolated.The proposed method is applied in the Tennessee Eastman process example,and the effectiveness and advantage are demonstrated.

关 键 词：MULTI-LEVEL structured residuals principal component analysis complex fault isolation Tennessee Eastman process 

分 类 号：TH165.3[机械工程—机械制造及自动化]