自動控制基礎知到章節(jié)測試答案智慧樹2023年最新同濟大學第一章測試

Aboutthepositivefeedbackcontrolsystem,whichoneofthefollowingiscorrect?（）

參考答案:

Thereispositivefeedbackcontrolsysteminthephysicalworld.

Therepresentativefigureinthehistoryofclassicalcontroltheoryincludes.（）

參考答案:

JamesClerkMaxwell;H.W.Bode;H.S.Black;HarryNyquist

Inthefollowingutilities,theclosed-loopsystemsinclude（）.

參考答案:

Vanelevator;Airconditioner

Thetrendofcontroldevelopmentis（）.

參考答案:

Highautonomy,Highflexibility

Asystemwithmorethanoneinputvariableormorethanoneoutputvariableisknownbywhatname?（）

參考答案:

Multivariablecontrolsystem

第二章測試

Considerthedifferentialequation,whereandisaunitstep.Thepolesofthissystemare（）.

參考答案:

Themathematicalfoundationofclassicalcontroltheoryincludes（）.

參考答案:

All

theoptions.

WhichofthefollowingstatementsisNOT對?（）

參考答案:

Whendealingwithtransferfunctions,theinitialconditionsareassumedtobenonzero.

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

參考答案:

T(s)=

Thes-planeplotofthepolesandzerosgraphicallyportraysthecharacterofthenaturalresponseofasystem.（）

參考答案:

對

第三章測試

Considerasecond-orderunderdampedsystem.Ifincreasesmeanwhileiskeptconstant,then（）.

參考答案:

therisetimeandthepeaktimewillreduce.

Considerasecond-ordersystemwiththetransferfunction.Thenthesystemis（）.

參考答案:

underdamped

Consideraunitynegativefeedbacksystem.Thesteady-stateerrorforarampinputisaconstantwithnonzerovalue.Thentheopensystemis（）.

參考答案:

atype-onesystem

Asystemhastheclosed-looptransferfunctionT(s)givenby.Usingthenotionofdominantpoles,estimatetheexpectedpercentovershoot.（）

參考答案:

P.O.≈20%

Theoptimumcontrolsystemisasystemwhoseparametersareadjustedsothattheperformanceindexreachesanextremumvalue.（）

參考答案:

對

第四章測試

Aboutthefeedbackincontrolsystems,whichisthebestdescription?（）

參考答案:

Allotheroptions

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

參考答案:

Complexityisameasureofthestructure,intricateness,orbehaviorofasystemthatcharacterizestherelationshipsandinteractionsbetweenvariouscomponents.（）

參考答案:

對

Lossofgainreferstoareductionintheamplitudeoftheratiooftheoutputsignaltotheinputsignalthroughasystem,usuallymeasuredindecibels.（）

參考答案:

對

Theregulationoffeedbackcontrolworksatthesametimethatdisturbancesactonasystem.（）

參考答案:

錯

第五章測試

TheRouth-Hurwitzcriterionrevealsthestabilityincasesof（）.

參考答案:

alltheclose-looppoleslyingintheleft-hands-plane.;singleclosed-looppolelyingontheimaginaryaxis.

WhenusingtheRouthcriterion,anall-zerorowintheRoutharraymeansthesystemis（）atbest.

參考答案:

criticallystable

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

參考答案:

2

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

參考答案:

becomesmaller

Whenwedeterminethestabilityofasystemwiththefollowingmethods,whichonesareequivalent?（）

參考答案:

Theclosed-looppoles;Routh-Hurwitzcriterion

第六章測試

Rootlocusprovidesussomeinstructionstoadjusttheparameterstomaketheperformanceofthissystemsatisfied.（）

參考答案:

對

Whentherootlocusofa2ndordersystemisgiven,wecanget（）fromit.

參考答案:

Stability;Settingtime;Percentovershoot

Consideraunityfeedbackcontrolsystem,itsopen-looptransferfunctionis.Whichoneiscorrectinthefollowingstatementsconcerningtherootlocusofthissystem?（）

參考答案:

asegmentofrootlocuslocatesontherealaxis;Thesystemisstablewhen;Alltheasymptotesintersectat

Abouttherootlocusofanegativefeedbackcontrolsystem,whichofthefollowingis對?（）

參考答案:

Therootlociaresymmetricalwithrespecttotherealaxis.

Foranegativefeedbackcontrolsystemwiththegainbeingnegative,thesegmentsoftherootlocuslocatetotheleftoftheoddopen-looppolesandzeros.（）

參考答案:

錯

第七章測試

Abridgeisdescribedbyasecond-ordertransferfunction.Andatroopisgoingtopassthroughthisbridge.Inordertopreventthebridgefrombeingbrokendowncausedbyresonantvibration,Thepaceofthistroopshouldbe（）.

參考答案:

Equalsto100;Greaterthan10

Theclosed-loopfrequencyresponsecharacteristicofasystemisshowninthefollowingtable.Whenthissystemisexcitedbyasinusoidalsignal,thecorrespondingsteadystateoutputresponseofthissystemis（）.

0.532040(dB)200dB-25-28-108-120-135-160

參考答案:

Consideranelement.Whenthefrequency,thephaseofis（）.

參考答案:

Oneadvantageofthefrequencyresponsemethodisthereadyavailabilityofsinusoidtestsignalsforvariousrangesoffrequenciesandamplitudes.（）

參考答案:

對

PolarplotismoreconvenientwhendescribingthefrequencyresponseofasystemthanBodediagramandallowustohaveaninsightintothecomponentscomposedofthissystem.（）

參考答案:

對

第八章測試

Givenanopenlooptransferfunction,thephasemarginisapproximately（）

參考答案:

10degrees

TheNyquiststabilitycriterionisusedtodeterminewhetherthereare（）ontherighthalfofthes-plane.

參考答案:

zerosofthecharacteristicpolynomialoftheclosedlooptransferfunction

Systemwithhigherbandwidthhasbetterabilitytotracktheinputsignal,andhasbetterperformanceonreducinghigh-frequencynoise.（）

參考答案:

錯

Consideraminimumphasesystem.Thehigheritsopen-loopgainis（）.

參考答案:

thesmalleritssteady-stateerroris

TheNyquistcurveofa1storderphase-leadnetworkis（）

參考答案:

Theupperhalfcircle

第九章測試

Whendebuggingtheclosed-loopsystem,theopen-loopgainofthesystemwasgraduallyincreased.Itwasfoundthatthecontrolprecisionofthesystemwasnotgoodwhenthespeedandstabilitymetthedesignrequirements.Whichofthefollowing