基于独立子空间算法和集成策略仪表微小故障诊断方法

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1、基于独立子空间算法和集成策略仪表微小故障诊断方法　　文章编号:10019081(2013)07206304doi:10.11772/j.issn.10019081.2013.07.2063摘要:针对流程工业中多仪表微小故障难以检测的问题，利用独立元分析(ICA)提取仪表变量的独立元信息，根据独立元贡献度矩阵构建独立元子空间，并分别在每个独立元子空间上根据不同的贡献率选择独立元个数，得出三个统计量及其控制限，建立故障检测模型。再综合所有子空间故障检测模型的检测结果，根据实际需求制定集成故障检测策略，最后通过贡献度算法对故障源进行识别和分离。对Tennes

2、seeEastman过程数据的仿真实验结果表明独立子空间算法提高了微小故障的检测精度，在流程工业中多仪表故障诊断中配合不同的集成故障检测策略在应用中更具有灵活性。关键词：仪表故障检测；独立元子空间；独立元贡献度；集成策略中图分类号：TP277文献标志码:A英文标题Smallfaultdetectionmethodofinstrumentsbasedonindependentcomponentsubspacealgorithm5andensemblestrategy英文作者名HUJichen1,HUANGGuoyong1*,SHAOZongkai1

3、,2,WANGXiaodong1,2,ZOUJinhui1,2英文地址(1.FacultyofInformationEngineeringandAutomation,KunmingUniversityofScienceandTechnology,KunmingYunnan650500,China;2.YunnanEngineeringResearchCenterforMineralPipelineTransportation,KunmingYunnan650500,China英文摘要)Abstract:Tosolvetheproblemofsma

4、llfaultdetectionofinstrumentsinprocessindustry,independentcomponentswereextractedbyIndependentComponentAnalysis(ICA)frominstrumentsrecordeddata.Andindependentcomponentsubspaceswereestablishedaccordingtothecontributionmatrix.Faultdetectionmodelwasconstructedineachindependentcomponentsubsp

5、acewithstatisticalvariables.Aproperensemblestrategywaschosenbycombining5allthefaultdetectionresults.Finally,theinstrumentwithfaultwaslocatedbycontributionalgorithm.ThesimulationresultswithTE(TennesseeEastman)processshowthatthismethodhashigherprecisiononsmallfaultdetectionandmoreflexibili

6、tywithproperensemblestrategy.Tosolvetheproblemofsmallfaultdetectionofinstrumentsinprocessindustry,independentcomponentsareextractedbyIndependentComponentAnalysis(ICA)frominstrumentsrecordeddata.Andindependentcomponentsubspacesareestablishedaccordingtothecontributionmatrix.Faultdetectionm

7、odelisconstructedineachindependentcomponentsubspacewithstatisticalvariables.Aproperensemblestrategyischosenbycombiningallthefaultdetectionresults.Finally,theinstrumentwhichhasfaultislocatedbycontributionalgorithm.SimulationresultwithTE(TennesseeEastman)processdataisshowna