自動(dòng)控制基礎(chǔ)知到智慧樹(shù)期末考試答案題庫(kù)2025年同濟(jì)大學(xué)WhichofthefollowingstatementsisNOT對(duì)?（）

答案:Whendealingwithtransferfunctions,theinitialconditionsareassumedtobenonzero.Whichisthereasonthatthephase-lagcompensatorscanbeusedtoincreasethephasemarginofsomesystems?（）

答案:thelagphase-angleofthecompensatorsWhenwesketchtherootlocus,theangleconditionsatisfiedbyaminimum-phasesystemisthesameasthatbyanon-minimumsystem.（）

答案:錯(cuò)Whenwedeterminethestabilityofasystemwiththefollowingmethods,whichonesareequivalent?（）

答案:Routh-Hurwitzcriterion；Theclosed-looppolesWhenusingtheRouthcriterion,anall-zerorowintheRoutharraymeansthesystemis（）atbest.

答案:criticallystableWhentherootlocusofa2ndordersystemisgiven,wecanget（）fromit.

答案:Percentovershoot；Stability；SettingtimeWhendebuggingtheclosed-loopsystem,theopen-loopgainofthesystemwasgraduallyincreased.Itwasfoundthatthecontrolprecisionofthesystemwasnotgoodwhenthespeedandstabilitymetthedesignrequirements.Whichofthefollowingmeasuresshouldbetaken?（）

答案:Adoptphase-lagcompensatorWhattypicalelementsarethereinautomaticcontrol?（）

答案:Proportionalelement；Inertialelement；Integralanddifferentialelement；OscillationelementWhatistheprincipaleffectofaleadcompensationonarootlocus?（）

答案:causethelocusbendtowardtheleft-halfplane.；movethedominantrootstoaplaceofhigherdampingWhatisnotthefeatureofaphase-lagcompensator?（）

答案:TobendtherootlocustotherightWhatinformationcanwereadfromarootlocus?（）

答案:Dampingratio；Stability；Specificgain；NaturalfrequencyWhataretheeffectsofphase-leadnetwork?（）

答案:increasebandwidth；decreasesettlingtime；speeduptransientresponseWhatactuatorcanconvertMechanicaldeformationtoelectricalenergy?（）

答案:ElectricgeneratorUnmannedaerialvehicles(UAVs)arebeingdevelopedtooperateintheairautonomouslyforlongperiodsoftime.Byautonomous,wemeanthatthereisnointeractionwithhumangroundcontrollers.NowanautonomousUAVistaskedforcropmonitoringusingaerialphotography.TheUAVmustphotographandtransmittheentirelandareabyflyingaprespecifiedtrajectoryasaccuratelyaspossible.Youarerequiredtodesignacontrolsystemtoperformthistask.Whichstatementconcerningyourcontrolsystemiscorrect?（）

答案:Mapcorrelationalgorithmandcameraarerequiredtobeonthefeedbackpath.；Theflighttrajectorywillkeeptuningaslongasthereisadeviationfromthedesiredtrajectory.Unitimpulseisatestinputconsistingofanimpulseofinfiniteamplitudeandzerowidth,andhavinganareaofunity.（）

答案:對(duì)Twodifferentsystemscanbecomposedofthesamecomponents.（）

答案:對(duì)Thetrendofcontroldevelopmentis（）.

答案:Highautonomy,HighflexibilityThetorquesensorcanmeasurewhichoneofthefollowingphysicalvariables?（）

答案:TorqueThesystemsensitivityistheratioofthechangeinthesystemtransferfunctiontothechangeofaprocesstransferfunctionforasmallincrementalchange.（）

答案:對(duì)Thesteady-stateerrorreferstheerrorbetweenthedesiredoutputandtheactualoutputwhenthetimeperiodislargeenoughandthetransientresponsehasdecayed.（）

答案:對(duì)Thes-planeplotofthepolesandzerosgraphicallyportraysthecharacterofthenaturalresponseofasystem.（）

答案:對(duì)TheRouth-Hurwitzcriterionrevealsthestabilityincasesof（）.

答案:alltheclose-looppoleslyingintheleft-hands-plane.；singleclosed-looppolelyingontheimaginaryaxis.TheRouth-Hurwitzcriteriondescribesthedegreeofstabilityofalinearcontrolsystem.（）

答案:錯(cuò)Therootlocusprovidesvaluableinsightintotheresponseofasystemtovarioustestinputs.（）

答案:對(duì)Therootlocusisthepaththerootsofthecharacteristicequation(givenby1+KG(s)=0)traceoutonthes-planeasthesystemparameter0≤K<∞varies.（）

答案:對(duì)TherootlocusalwaysstartsatthezerosandendsatthepolesofG(s).（）

答案:錯(cuò)Therisetimeisdefinedasthetimerequiredforthesystemtosettlewithinacertainpercentageoftheinputamplitude.（）

答案:錯(cuò)Theresonantfrequencyandbandwidthcanberelatedtothespeedofthetransientresponse.（）

答案:對(duì)Therepresentativefigureinthehistoryofclassicalcontroltheoryincludes.（）

答案:JamesClerkMaxwell；HarryNyquist；H.S.Black；H.W.BodeTheregulationoffeedbackcontrolworksatthesametimethatdisturbancesactonasystem.（）

答案:錯(cuò)Thepropertiesofadeadbeatsystemexcludes()forastepinput.（）

答案:Bigstabilitymargin.Theprocessofcontrolsystemdesigninclude().（）

答案:Establishmentofgoalsandvariablestobecontrolled.；Systemdefinitionandmodeling；Controlsystemdesign；IntegratedsystemsimulationThephase-leadnetworkprovidesanattenuationandincreasesthesteady-stateerrorconstant.（）

答案:錯(cuò)Theperformancemeasuresofclosed-loopsysteminfrequencydomaininclude（）.

答案:Bandwidth；ResonantmagnitudeTheparametersofasystemchangedalittleafteralong-termuse,andtheminimumclosed-looppolemoves0.5totheright,thestabilityofthissystemwill（）.

答案:becomesmallerTheoptimumcontrolsystemisasystemwhoseparametersareadjustedsothattheperformanceindexreachesanextremumvalue.（）

答案:對(duì)TheNyquiststabilitycriterionisusedtodeterminewhetherthereare()ontherighthalfofthes-plane.（）

答案:zerosofthecharacteristicpolynomialoftheclosedlooptransferfunctionTheNyquiststabilitycriterionisusedtodeterminewhetherthereare（）ontherighthalfofthes-plane.

答案:zerosofthecharacteristicpolynomialoftheclosedlooptransferfunctionTheNyquistcurveofa1storderphase-leadnetworkis（）

答案:TheupperhalfcircleThenecessaryconditionforthestabilityofthelinearsystemisthatallthecoefficientsofcharacteristicequation1+G(s)H(s)=0,berealandhavethe().（）

答案:SamesignThemathematicalmodelofsystemsinclude().（）

答案:Differentialequation；Transferfunction；Blockdiagram；SignalflowchartThemathematicalfoundationofclassicalcontroltheoryincludes（）.

答案:All

theoptions.Theheartrateofapersoncanbemeasureby().（）

答案:Electronicsphygmomanometer；Stethoscope；Electrocardiogram；RadialarterycountThefollowstatementsconcerningfrequency,whichonesarecorrect?（）

答案:Breakfrequencyisthefrequencyatwhichtheasymptoticapproximationofthefrequencyresponseforapole(orzero)changesslope；DecadeisafactorofteninfrequencyTheflyballgovernorisgenerallyagreedtobethefirstautomaticfeedbackcontrollerusedinanindustrialprocess.（）

答案:對(duì)Systemwithhigherbandwidthhasbetterabilitytotracktheinputsignal,andhasbetterperformanceonreducinghigh-frequencynoise.（）

答案:錯(cuò)SupposethatonedesignspecificationforanegativefeedbackcontrolsystemrequiresthatthepercentovershoottoastepinputbeP.O.≤10%.Thecorrespondingspecificationinthefrequencydomainis().（）

答案:SupposethatonedesignspecificationforanegativefeedbackcontrolsystemrequiresthatthepercentovershoottoastepinputbeP.O.≤10%.Thecorrespondingspecificationinthefrequencydomainis().（）Sometermsandtheirexplanationaregiveninthefollowingtable.Whichmatchiscorrect?（）(T1)Actuator(E1)Anunwantedinputsignalthataffectsthemeasuredoutputsignal.(T2)Sensor(E2)Adeviceemployedbythecontrolsystemtoalteroradjusttheenvironment.(T3)Mechatronics(E3)MechatronicsThesynergisticintegrationofmechanical,electrical,andcomputersystems(T4)Measurementnoise(E4)Adevicethatprovidesameasurementofadesiredexternalsignal

答案:T1—E2,T2—E4,T3—E3,T4—E1Rootswithhighermultiplicityontheimaginaryaxismakesthesystem().（）

答案:UnstableRootlocusprovidesussomeinstructionstoadjusttheparameterstomaketheperformanceofthissystemsatisfied.（）

答案:對(duì)PolarplotismoreconvenientwhendescribingthefrequencyresponseofasystemthanBodediagramandallowustohaveaninsightintothecomponentscomposedofthissystem.（）

答案:對(duì)Oneofthemostimportantcharacteristicsofcontrolsystemsistheirtransientresponse.（）

答案:對(duì)Oneadvantageofthefrequencyresponsemethodisthereadyavailabilityofsinusoidtestsignalsforvariousrangesoffrequenciesandamplitudes.（）

答案:對(duì)Ontherootlocusplot,thenumberofseparatelociisequaltothenumberoffinitezerosofG(s).（）

答案:錯(cuò)Ofthefollowingsystems,whichonemayNOTbenegativefeedbackcontrol?（）

答案:EconomicinflationNyquiststabilitycriterionusestheclosed-looptransferfunctiontodeterminewhetherthecorrespondingsystemisstable.（）

答案:錯(cuò)Motorisusuallytoconvert().（）

答案:ElectricalenergytomechanicalenergyMathematicalmodelhasbroadapplication,().（）

答案:Itcanbeusedtorevealthemechanismofaprocess.；Itcanbeusedtoforecastthetrendofavariableinfuture.；Itcanbeusedtoprovideakindofoptimalplanningscheme.Lossofgainreferstoareductionintheamplitudeoftheratiooftheoutputsignaltotheinputsignalthroughasystem,usuallymeasuredindecibels.（）

答案:對(duì)Itiscalledanonminimumphasetransferfunctionifithaszerosintheright-hands-plane.（）

答案:對(duì)Inthefollowingutilities,theclosed-loopsystemsinclude（）.

答案:Airconditioner；VanelevatorInthefollowingstatementsconcerningtransferfunction,whichoneiscorrect?（）

答案:Transferfunctionisusuallyarationalproperfractionofthecomplexvariables.；Transferfunctionisrelatedtothestructureandparametersofasystem.；Underzeroinitialconditions,transferfunctionanddifferentialequationcanbetransformedeachother.Inthefollowingstatementsconcerningthestepresponseof1st-ordersystem,whichoneiscorrect?（）

答案:NoovershootInthefollowingstatementsconcerningnegativefeedbackcontrol,whichoneiscorrect?（）

答案:Itisakindofcontrolbasedonerrorsignal；Itcanreducethesteadystateerror；ItcanmakethetransientresponsefasterInthefollowingstatementsconcerningmathematicalmodelofsystemsincontrol,whichoneiscorrect?（）

答案:usedtodescribeadynamicsystem；usedtodescribeacasualsystemInthefollowingstatementsconcerningmarginallystable,whichoneiscorrect?（）

答案:Marginallystablemeansasystempossessesthistypeofstabilityifthezero-inputresponseremainsboundedast→∞.；Asystemismarginallystableifithassingleclose-looppolesontheimaginaryaxis.；Amarginallystablesystemshowsoscillationofresponsewithconstantamplitude.Inthefollowingstatementsconcerningabsolutestability,whichoneiscorrect?（）

答案:Absolutestabilityisasystemdescriptionthatrevealswhetherasystemisstableornotstablewithoutconsiderationofothersystemattributessuchasdegreeofstability；Theclosed-looppolesrevealbothabsolutestabilityandrelativestability.；Routh-Hurwitzcriterionrevealsonlyabsolutestability.Importantmodernapplicationsofcontrolsystemsincludewhichofthefollowing?（）

答案:All

otheroptionsIfthereisafinitesteady-stateerrorinthesystem,thesystemis().（）

答案:StableForPIDcontroller,theintegralpartshouldworkon（）toimprovethesteadystateperformance,andthedifferentialpartshouldworkon（）toimprovethedynamicperformance.

答案:low-frequencypart,mid-frequencypartForfrequencydomaincompensation,whichoneisNOTcorrect.（）

答案:Atlowfrequency,theopen-loopgainismainlydecidedbythesystemdynamicperformance.Forcomplexconjugatepoles,whatisthedampingratiowhenresonancehappen?（）

答案:lessthan0.707Forasecond-ordersystem,whichofthefollowingwilldecreasewhenthedampingratioisincreased?（）

答案:SettlingtimeForanegativefeedbackcontrolsystemwiththegainbeingnegative,thesegmentsoftherootlocuslocatetotheleftoftheoddopen-looppolesandzeros.（）

答案:錯(cuò)Feedbackcontrolhassomeattractingadvantagesaswellassomeindispensabledisadvantages.Inpractice,theeffectofdisadvantagesshouldbekepttobetheminimumwhenwemakeuseoftheadvantages.（）

答案:對(duì)Feedbackcontrolcanincreasethestabilitydegree.（）

答案:錯(cuò)Differentialequationisthemodelfoundationofclassicalcontroltheory.（）

答案:對(duì)Controlcanonlybeappliedtoindustrialprocess.（）

答案:錯(cuò)Considerarealnegativefeedbackcontrolsystem,whichstatementiscorrect?（）

答案:Themodelinthefeedforwardpathcanbelessprecise.；Themodelinthefeedbackpathcanbelessprecise.Consideraminimumphasesystem.Thehigheritsopen-loopgainis（）.

答案:thesmalleritssteady-stateerrorisComplexityisameasureofthestructure,intricateness,orbehaviorofasystemthatcharacterizestherelationshipsandinteractionsbetweenvariouscomponents.（）

答案:對(duì)Anadvantageofusingfeedbackisadecreasedsensitivityofthesystemtovariationsintheparametersoftheprocess.（）

答案:對(duì)Aftertherootlocusofaclosed-loopcontrolsystemisdetermined,ifweaddazerototheopen-looptransferfunction,therootlocuswill().（）

答案:MovefromrighttoleftAbouttherootlocusofanegativefeedbackcontrolsystem,whichofthefollowingis對(duì)?（）

答案:Therootlociaresymmetricalwithrespecttotherealaxis.Aboutthepositivefeedbackcontrolsystem,whichoneofthefollowingiscorrect?（）

答案:Thereispositivefeedbackcontrolsysteminthephysicalworld.Aboutthefeedbackincontrolsystems,whichisthebestdescription?（）

答案:AllotheroptionsAtype-1systemhasazerosteady-statetrackingerrortoarampinput.（）

答案:錯(cuò)Atransferfunctionistermedminimumphaseifallitszeroslieintheright-hands-plane.（）

答案:錯(cuò)Asystemwiththepolynomials^4+5s^3+3s^2+6s+5=0is().（）

答案:UnstableAsystemwithmorethanoneinputvariableormorethanoneoutputvariableisknownbywhatname?（）

答案:MultivariablecontrolsystemAprimaryadvantageofanopen-loopcontrolsystemistheabilitytoreducethesystem’ssensitivity.（）

答案:錯(cuò)ANyquistplotdisplayscurvesdescribingtherelationshipbetweentheopen-loopandclosed-loopfrequencyresponses.（）