自動(dòng)控制基礎(chǔ)知到章節(jié)答案智慧樹(shù)2023年同濟(jì)大學(xué)

自動(dòng)控制基礎(chǔ)知到章節(jié)測(cè)試答案智慧樹(shù)2023年最新同濟(jì)大學(xué)第一章測(cè)試Aboutthepositivefeedbackcontrolsystem,whichoneofthefollowingiscorrect?（）

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Thereispositivefeedbackcontrolsysteminthephysicalworld.Therepresentativefigureinthehistoryofclassicalcontroltheoryincludes.（）

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JamesClerkMaxwell;H.W.Bode;H.S.Black;HarryNyquistInthefollowingutilities,theclosed-loopsystemsinclude（）.

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Vanelevator;AirconditionerThetrendofcontroldevelopmentis（）.

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Highautonomy,HighflexibilityAsystemwithmorethanoneinputvariableormorethanoneoutputvariableisknownbywhatname?（）

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Multivariablecontrolsystem第二章測(cè)試Considerthedifferentialequation,whereandisaunitstep.Thepolesofthissystemare（）.

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****Themathematicalfoundationofclassicalcontroltheoryincludes（）.

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All

theoptions.WhichofthefollowingstatementsisNOT對(duì)?（）

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Whendealingwithtransferfunctions,theinitialconditionsareassumedtobenonzero.Acartofmassm=1000kgisattachedtoatruckusingaspringofstiffnessk=20,000N/mandadamperofconstantb=200Ns/m,asshowninthefollowingfigure.Thetruckmovesataconstantaccelerationofa=0.7m/.Thetransferfunctionbetweenthespeedofthetruckandthespeedofthecartis（）.

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T(s)=Thes-planeplotofthepolesandzerosgraphicallyportraysthecharacterofthenaturalresponseofasystem.（）

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對(duì)第三章測(cè)試Considerasecond-orderunderdampedsystem.Ifincreasesmeanwhileiskeptconstant,then（）.

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therisetimeandthepeaktimewillreduce.Considerasecond-ordersystemwiththetransferfunction.Thenthesystemis（）.

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underdampedConsideraunitynegativefeedbacksystem.Thesteady-stateerrorforarampinputisaconstantwithnonzerovalue.Thentheopensystemis（）.

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atype-onesystemAsystemhastheclosed-looptransferfunctionT(s)givenby.Usingthenotionofdominantpoles,estimatetheexpectedpercentovershoot.（）

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P.O.≈20%Theoptimumcontrolsystemisasystemwhoseparametersareadjustedsothattheperformanceindexreachesanextremumvalue.（）

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對(duì)第四章測(cè)試Aboutthefeedbackincontrolsystems,whichisthebestdescription?（）

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Allotheroptions

Considertheclosed-looptransferfunction,whereA1,A2,A3andA4areconstants.ComputethesensitivityofthesystemtovariationsintheparameterK.（）

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****Complexityisameasureofthestructure,intricateness,orbehaviorofasystemthatcharacterizestherelationshipsandinteractionsbetweenvariouscomponents.（）

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對(duì)Lossofgainreferstoareductionintheamplitudeoftheratiooftheoutputsignaltotheinputsignalthroughasystem,usuallymeasuredindecibels.（）

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對(duì)Theregulationoffeedbackcontrolworksatthesametimethatdisturbancesactonasystem.（）

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錯(cuò)第五章測(cè)試TheRouth-Hurwitzcriterionrevealsthestabilityincasesof（）.

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alltheclose-looppoleslyingintheleft-hands-plane.;singleclosed-looppolelyingontheimaginaryaxis.WhenusingtheRouthcriterion,anall-zerorowintheRoutharraymeansthesystemis（）atbest.

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criticallystableTheclosed-loopcharacteristicequationofasystemis,howmanyunstableclosed-loopsystemarethereintheright-halfclosed-looppoles?（）

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2Theparametersofasystemchangedalittleafteralong-termuse,andtheminimumclosed-looppolemoves0.5totheright,thestabilityofthissystemwill（）.

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becomesmallerWhenwedeterminethestabilityofasystemwiththefollowingmethods,whichonesareequivalent?（）

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Theclosed-looppoles;Routh-Hurwitzcriterion第六章測(cè)試Rootlocusprovidesussomeinstructionstoadjusttheparameterstomaketheperformanceofthissystemsatisfied.（）

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對(duì)Whentherootlocusofa2ndordersystemisgiven,wecanget（）fromit.

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Stability;Settingtime;PercentovershootConsideraunityfeedbackcontrolsystem,itsopen-looptransferfunctionis.Whichoneiscorrectinthefollowingstatementsconcerningtherootlocusofthissystem?（）

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asegmentofrootlocuslocatesontherealaxis;Thesystemisstablewhen;AlltheasymptotesintersectatAbouttherootlocusofanegativefeedbackcontrolsystem,whichofthefollowingis對(duì)?（）

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Therootlociaresymmetricalwithrespecttotherealaxis.Foranegativefeedbackcontrolsystemwiththegainbeingnegative,thesegmentsoftherootlocuslocatetotheleftoftheoddopen-looppolesandzeros.（）

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錯(cuò)第七章測(cè)試Abridgeisdescribedbyasecond-ordertransferfunction.Andatroopisgoingtopassthroughthisbridge.Inordertopreventthebridgefrombeingbrokendowncausedbyresonantvibration,Thepaceofthistroopshouldbe（）.

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Equalsto100;Greaterthan10Theclosed-loopfrequencyresponsecharacteristicofasystemisshowninthefollowingtable.Whenthissystemisexcitedbyasinusoidalsignal,thecorrespondingsteadystateoutputresponseofthissystemis（）.0.532040(dB)200dB-25-28-108-120-135-160

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****Consideranelement.Whenthefrequency,thephaseofis（）.

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Oneadvantageofthefrequencyresponsemethodisthereadyavailabilityofsinusoidtestsignalsforvariousrangesoffrequenciesandamplitudes.（）

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對(duì)PolarplotismoreconvenientwhendescribingthefrequencyresponseofasystemthanBodediagramandallowustohaveaninsightintothecomponentscomposedofthissystem.（）

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對(duì)第八章測(cè)試Givenanopenlooptransferfunction,thephasemarginisapproximately（）

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10degreesTheNyquiststabilitycriterionisusedtodeterminewhetherthereare（）ontherighthalfofthes-plane.

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zerosofthecharacteristicpolynomialoftheclosedlooptransferfunctionSystemwithhigherbandwidthhasbetterabilitytotracktheinputsignal,andhasbetterperformanceonreducinghigh-frequencynoise.（）

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錯(cuò)Consideraminimumphasesystem.Thehigheritsopen-loopgainis（）.

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thesmalleritssteady-stateerrorisTheNyquistcurveofa1storderphase-leadnetworkis（）

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Theupperhalfcircle第九章測(cè)試Whendebuggingtheclosed-loopsystem,theopen-loopgainofthesystemwasgraduallyincreased.Itwasfoundthatthecontrolprecisionofthesystemwasnotgoodwhenthespeedandstabilitymetthedesignrequirements.Whichofthefollowingmeas