凝结换热试验台监控系统开发与试验-研究

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1、凝结换热试验台监控系统开发及试验研究DevelopmentofSupervisoryControlSystemforCondensmionHeatTransferTest—BoardandExperimentalStudyAbstractFilmcondensationheattransferproblemsoutsidetwo·dimensional，three·dimensionalfintube，especiallytubebundleareprimarilysolvedbyexperimentalmetho

2、ds．Sincetherequkememsofhighprecisiontemperaturecontrolandlargequantitiesofdatatobecollectedandanalyzedinthetest，weneedtodevelopasupervisorycontrolanddataacquisitionsystem．Thispaperfirstintroducessystemprinciplesandmajorequipmemsofcondensationheattransfertest-b

3、oard．Detailedneedsanalysiswerecarriedoutforthecondensationheattransfertest．Hardwareofthesupervisorycontrolsystemweredeveloped，includingindependenttemperaturecontrolsubsystemanddataacquisitionsubsystem，inordertomeetthedifferentreqmrememsofsamplingtime．Thenthemo

4、nitoringlayerincludingmonitoringscreenandCurveanalysiswindowwascompletedbydeviceconfiguration，databaseconfiguration，screenconfigurationandActionScriptintheconfigurationsoftware，toachievereal-timedataexchange，display，historicaldatastorageandctl／'vetrendanalysis

5、．InLabVIEW，throughI／OcommunicationtoachievethedataexchangebetweensoftwareandhardwareandbetweenconfigurationsoftwareandLabVIEW．TemperaturePIDcontroller、历t11gainschedulecontrolandSmithPredictorcontrolisdevelopedbyusingPIDandFuzzyLogicToolkit．Stepresponsecurvesar

6、eplottedthroughexperimentalmethods，asaresultofnoself-balancingcapability，fromwhichtransferfunctionsareobtained．ThispaperdesignsaSmithPredictorschemefornoself-balancingcapabilityobject．GainschedulecontrolandSmithPredictorcontrolareinitiallyconfirmedprobabilitya

7、ftersimulationstudyinLabVIEW．Finally，aftersoftwareandhardwaredebugging，theresultofhotwatertemperatureexperimentalstudyshowsthatgainschedulecontrolisobviouslyimprovedintemperatureovershootandlessregulationtimethanusingPIcontrolorPIDcontrolseparately．Temperature

8、overshootissignificantlyreducedwithPIcontrolafterSmithPredictor，andregulationtimeismuchshorterwithgainschedulecontrolafterSmithPredictor．Bycomparison，forthehotwatertemperature，usin