基于多级流模型的故障诊断技术研究

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1、浙江大学机械与能源工程学院硕士学位论文基于多级流模型的故障诊断技术研究姓名：刘仲宇申请学位级别：硕士专业：机械制造及其自动化指导教师：杨世锡20080501浙江大学硕f：学位论文摘要关键词：系统级故障诊断，多级流模型(MFM)，目标，功能，火力发电系统，流程工业llABSTRACTMonitoringandfaultdiagnosistechnologycallensurethattheequipmentsruninasafety,reliableandefficientwayinprocessindustry．Itplaysakeyrolebothinelimin

2、atinghiddenfaultandavoidingoccurringofaccident．Thispapertakesmulti·levelmodel(nextforshortasMFM)asthetheoreticalfoundation,basedonZhejiangProvinceScientificandTechnologicalProjects”Distributedintelligenceunitremotemonitoringandfaultdiagnosistechnologyandsystemsresearchanddevelopment”(2

3、007C21086)，researchonthefaultdiagnosismethodsforprocessindustrysystem，takingthermalpowergeneratingsystemasobject．Thatcanpromotethedevelopmentofscienceandtechnology．Themaincontentsaleasfollows：Thefirstchapterdiscussedthesignificanceoffaultdiagnosisinprocessindustry，describedthedevelopme

4、nthistoryandcurrentstatusonfaultdiagnosisinprocessindustry，reviewedthedevelopmentandcurrentstatusofMFM，andcomparativelyanalyzedtheadvantagesofMFMinthesystemfaultdiagnosis．Finally，themaincontentsandtheoverallframeworkofthethesiswerepresentedwiththespecificrequirementsofscientificresearc

5、hprojects．Thesecondchapteranalyzedtheadvantagesanddisadvantagesofseveralcommonmethodofmodeling，introducedthebasicprinciplesandtherelatedconceptofMFM，studiedthemethodofmodelingMFM，builtMFMofathermalpowersupplysystem，analyzedthecausaldependencybetweenthefunctioninMFM，gavecausaldependency

6、graphs，presentedthecausaldependencematrixbetweenthefunctionwhichhavemulti—stateinordertofacilitatetheapplicationofcomputerinthecalculationandanalysisbasedonMFM．ThethirdchapteranalyzedthefaultdiagnostictechnologybasedonMFM，summeduptheprocessoffaultdiagnosisbasedonMFM，analyzedtheattribut

7、eoftheflow，thegroupingoffunction，theruleofalarmanalysis，presentedthevalidationmethodofthemeasurevalueandthealarmstateontheunknownfunctions，giventherealizationofthetwodiagnosticalgorithmsprocess．FinallytheapplicabilityoffaultdiagnosticalgorithmsbasedontheMFMisanalyzed·Thefourthchapter