自動(dòng)化專業(yè)英語練習(xí)

一、過去分詞短語做后置定語練習(xí)1、Asystemcharacterizedbytherelationy=x2isnotlinear.2、PracticallyallPIDcontrollersmadetodayarebasedonmicroprocessors.3、ThebasiccontrolsystemconceptmaybethesimpleblockdiagramshowninFig1.4、Ageneralstructureofaclosed-loopcontrolsystemisgiveninFig.1.5、Themanipulatedvariableisthevariableusedtomaintainthecontrolledvariableatitssetpoint.6、Thisisasimpleunityfeedbacksystemandisthestandardblockdiagramusedtoillustratethebasicconceptsofcontroltheory.7、InFigure.1.1,thesensorandtheactuatorareconsideredpartoftheblocklabeled“Process”.8、Inthesimplestsituation,onecontrolsasingleplantvariable,calledtheoutput,bymeansofadjustmentstoasingleplantinput.9、Forinstance,amplifiersusedincontrolsystemoftenexhibitsaturationeffect（飽和效應(yīng)）whentheirinputsignalsbecomelarge.10、MuchofthisworkwaspresentedatthefirstconferenceofthenewlyformedInternationalFederationofAutomaticControlheldinMoscowin1960.二、介詞短語做后置定語練習(xí)1、Amathematicalmodelofacontrolsystemisessential.2、Anopen-loopsystemisasystemwithoutfeedback.3、Theinput-outputrelationshipintheLaplacedomainiscalledthetransferfunction.4、Becausethesystemsunderconsiderationaredynamicinnature,thedescriptiveequationsareusuallydifferentialequations.5、Whatismissingintheopen-loopcontrolsystemformoreaccurateandmoreadaptablecontrolisalinkoffeedbackfromtheoutputtotheinputofthesystem.6、Asystemwithoneormorefeedbackpathsiscalledaclosed-loopsystem.7、Oftenthedifferencebetweentheoutputofthesystemandthereferenceinputisamplifiedandusedtocontrolthesystemsothatthedifferenceiscontinuallyreduced.8、Accordingtothisruletheblocksinparallelconnectioncanbecombinedintooneblockandtheoveralltransferfunctionisthenthesumoftheindividualblocktransferfunction.9、Themathematicalmodeldescribestherelationshipbetweentheinputandtheoutputofthesystem.10、Inthepresentstudy,attentionisconfinedtothosesystemsforwhichtheinput-outputrelationshipisdescribedbyordinarylinerdifferentialequationswithconstantcoefficients.三、現(xiàn)在分詞短語做后置定語練習(xí)1、Aplantisapieceofequipment,perhapsjustasetofmachinepartsfunctioningtogether,thepurposeofwhichistoperformaparticularoperation.2、Diagramsrepresentingthesetwobasicstrategiesofcontrolareshowninfig.1.3、Thetermmathematicalmodelmeansthemathematicalrepresentationsdescribingtherelationshipsamongthevariablesofasystem.4、Stabilitydependsontherootsofthecharacteristicequationhavingnegativerealparts.5、Thetransferfunctiondescriptiondoesnotincludeaninformationconcerningtheinternalstructureofthesystem.6、Byusingthephysicallawsdescribingthelinearsystem,wecanobtainasetoflineardifferentialequations.7、Thesesignalprocessingtasksareimplementedthroughtheuseofappropriatehardwarecalledthecontroller.8、Acontrolsystemisanorganizedcollectionofinteractingunitsdesignedtoachievesomespecifiedobjectivesbymanipulationandcontrolofmaterials,energy,andinformation.9、Followingtransferfunctionsdefinedinthefeedbackcontrolsystemsareveryusefulinourstudy.10、Thetransferfunctionofasystem(orelement)representstherelationshipdescribingthedynamicofthesystemunderconsideration.四、其它形式的后置定語1、不定式做后置定語Inaradartrackingsystem,thepositionandspeedofthetargettobetrackedmayvaryinanunpredictablemanner.Measurementofthevariabletobecontrolledisusuallydonebythecombinationofsensorandtransmitter.(3)Theengineerdesigningacontrolsystemmustbesurethattheactiontakenaffectsthevariabletobecontrolled,thatis,theactiontakenaffectsthemeasuredvalue.2、形容詞短語做后置定語(1)Inordertoobtainmoreaccuratecontrol,thecontrolledsignalmustbefedbackandcomparedwiththereferenceinput,andanactuatingsignalproportionaltothedifferenceoftheoutputandtheinputmustbesentthoughthesystemtocorrecttheerror.3、定語從句做后置定語Everyfeedbackcontrolsystemconsistsofcomponentsthatperformspecificfunctions.Therearemanysituationswhereseveralvariablesaretobecontrolledsimultaneouslybyanumberofinputs.Whenasystemdoesnothavethefeedbackstructure,itiscalledanopen-loopsystem,whichisthesimplestandmosteconomicaltypeofthecontrolsystem.Anopen-loopsystemisasystemwhoseinputu(t)doesnotdependontheoutputy(t)Anotherapproachtocontrolsystemsdesignwasintroducedin1948byW.R.Evans,whowasworkinginthefieldofguidanceandcontrolofaircra