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1、附录英文资料及其译文CHAPTER1Basisoftheautomaticcontrol 1.1. OutlineThisdeviceistemperaturecontrolexperimentaldeviceoftemperature,lever,pressure,thatarethemostcommoncontrolsubjectforwatertreatmentplants,chemicalfactoriesandpowerplants.Attheexperimentofautomaticcontrol,itisveryimportanttokeepthebalanceof
2、system.Automaticcontrolsystemiscomposedofcontrolsubjectsandtokeepcontroldevice.Especiallyprocesscontrolhasmanycontrolsubjectstokeepself-balance,sotheexperimentalresultsisconductedwithbalancecondition.Thisexperimentaldeviceexperimentsabouttherelationofinputsignalandoutputsignaltokeepthebalance(Syst
3、emcharacteristics)atthecascadeexperimentandfixedcommandcontrol,alsoexperimentsondynamiccharacteristic(Balanceconditionwithouttimevariation),staticcharacteristic(Balanceconditionconsideratingtimevariation).Andyourecordthechangeofcontrolamountwhichwasinputhandlingamountorestablishmentofcharacteristi
4、cexperiment.Thesetypicalresponsecanbethoughtstepresponse.Youexperimentoptimumcontrolexperiment,fixingP.I.Dconstantofcontroldevice,relatingthisstepresponse. 2. ProcesscontrolProcesscontrolkeepsthebalanceofthesystem,automaticallycorrectingtowarddeviation,andcompareseveryvariabletooperatingtowar
5、ddeviation,andcompareseveryvariabletooperationconditionofindustrialprocessofflux,temperature,surface,pressure,etcwiththeestablishedgoal.ProcesscontrolisdecidedintoclosedloopandOpenloopcontrol. 3. KindsofautomaticcontrolControliscomposedofdetection(measurement),comparison,judgment,operationand
6、manualcontrolisdonebyman’shandandautomaticcontrolisdonebymeasureoradjusterorothermachinery.Atpresent,automaticcontrolistakenatthemanyplants.Moreover,wecannotthinkplantcontrolwithoutautomaticcontrol.Kindsofautomaticcontrolisdecidedlikebelow. AutomaticcontrolOpenloopcontrolFeedforwardcontrolSequenti
7、alcontrol ClosedloopcontrolFeedbackcontrol103-1.FeedbackcontrolFeedbackcontroldetects(measure)compares,judges,operates,automatically.Anditmeasurestheresultseverymoment,andcorrectsautomaticallyifthereisanydifferen
