过程控制试卷

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1、南京工业大学过程控制工程试题（B）卷（闭）2006—2007学年第1学期使用班级自03A方向班级学号姓名题号一二三四总分得分一、选择题：（1-6题为单选题每题3分，7-9题为多选题每题4分）[]1.Thebehaviorofthecontrolledvariable,CV,isimportantbecause...AItwasselectedtoachieveoneormoreofthe7controlobjectives.BThesensormeasuresthisvalueCLargefluctuationscreatemessytrendplots.[]2.T

2、hePIDcontroller...Aisnon-linear.Bislinear(obeysproportionalityandsuperposition)Cobeysproportionalityonly.Dobeyssuperpositiononly.[]3.Whichofthefollowingstatement(s)doesNOTappearinthecascadecontroldesigncriteria?AThesecondaryvariablemustindicatetheoccurrenceofanimportantdisturbance.BOnl

3、yonevalvecaninfluencethesecondaryandprimaryvariables.CThesecondaryvariabledynamicsmustbefasterthantheprimaryvariabledynamicsDTheremustbeacausalrelationshipbetweenthemanipulatedandsecondaryvariables.[]4.Whichofthefollowingstatementsaretrueforavalvepositioner?AItisasecondaryinacascadecon

4、trolsystem.BItusesnomeasuredvariable.CItcanimprovethecontrolperformanceforaslowfeedbackcontrolloop.南京工业大学第6页（共6页）[]1.Cascadecontrolinvolvestwocontrolledvariables,butonlyonevalve.AThedescriptionisnotcorrect;cascadeinvolvestwocontrolledvariablesandtwovalves.BThedescriptionisnotcorrect;ca

5、scadeinvolvesonecontrolledvariableandonevalve.CCascadecontrolinvolvestwocontrolledvariables,butonlytheprimaryvariableiscontrolledindependentlybythevalve.DThedegreesoffreedomprincipledoesnotapplytoasystemwithtwocontrollers.[]2.Thenon-isothermalstirredtankchemicalreactorisshowninthefigur

6、ebelow.WewanttocontrolAC-1. Whatisthebestcascadedesignforthedisturbancesshowninthefigure?AAC-1->TC-1->vcBAC-1->AC-2->vcCAC-1->AC-2->va[]3.Thethreemodesofthemostcommonfeedbackcontrollerarecalledthe...APersistentBIntegralCProportionalDDerivativeEInteractingFDisturbance[]4.Whichofthesecon

7、trolloopelementsaretypicallyveryfastandveryaccurateAElectricalTransmissionBSignalConversionCProcessDFinalElement,Valve[]5.Forthecascadecontrollerinthefigurethetemperaturecontrollercanbereferredtoas:APrimaryBToplevelCsecondaryDOuter南京工业大学第6页（共6页）二、判断题：(每题3分共18分)[]1.Feedbackcontrolcanb