机电系统的建模、辨识与控制（双语）知到智慧树期末考试答案题库2025年浙江大学

机电系统的建模、辨识与控制（双语）知到智慧树期末考试答案题库2025年浙江大学Whichoneisaleadcompensator?（）

答案:Whichoneisaleadcompensator?（）WhichofthefollowingscanenhancetheSNR.（）

答案:Usingaslargeinputsaspossible；Usingsensorwithsmallmeasurementnoise.WhichofthefollowingscanenhancetheSNR?（）

答案:Useaslargeinputsaspossible；Usesensorwithsmallmeasurementnoise.Whichofthefollowingsystemisanonlinearsystem?（）

答案:Whichofthefollowingsystemisanonlinearsystem?（）WhichofthefollowingMatlabcommandisusedtogenerateasumof500sinusoidsrangingfrom0.1Hzto1KHzwithasamplingfrequencyof10KHz?（）

答案:sinesum=idinput([10000011],'sine‘,[00.2],[-11],[500508]);Whichofthefollowingisastablesystem?（）

答案:Whichofthefollowingisastablesystem?（）Whichofthefollowingelementscanabsorbenergy?（）

答案:Translationaldamper；Bearing；BushingWhichofthefollowingelementcanberegardedasafluidcapacitance?（）

答案:Hydrauliccylinderchamber；AccumulatorWhichfluidelementisrelatedtotheWaterHammerEffect?（）

答案:FluidinertanceWhichcaseiscorrect?（）

答案:Theopenloopcontrolsystemwilldefinitelynotvibrate.Whichcaseindicatesagoodsystemidentificationresultasseenfromthefollowingresidual?（）

答案:TheresidualisnotcorrelatewiththesysteminputWhenthereisnomodelstructureerror,thenecessaryconditionofmodelparametersaccuratelyRecoveredis（）.

答案:theregressormatrixhasafullcolumnrankWhenthereismodelstructureerror,whichofthefollowingscanobtainanunbiasedparameterestimate?（）

答案:Usepersistentexciting；IncreaseofSNRWhenthereismodelstructureerror,theleastsquareparameterestimationwillconvergetoits对values.（）

答案:错Whenthereismodelstructureerror,thelargertheSNRis,thesmallerthecovariancematrix,andthemoreconsistenttheresultingparameterestimatesare.（）

答案:对Whentheleastsquareparameterestimationiscarriedoutwithmodelstructureerror,thefinalvalueoftheparameterestimationwillconvergetothe对valueofmodelparameters.（）

答案:错Whentheleastsquareparameterestimationiscarriedoutforsystemidentificationwithmodelstructureerror,thehighertheSNR(signalnoiseratio)is,thesmallerthecovarianceis,andthemoreconsistenttheparameterestimationresultsare.（）

答案:对Whendesignofunitfeedbackcontrolsystem,whichofthecaseswillresultinlargeovershootinthestepresponse.（）

答案:Slowstablezerointheopen-looptransferfunctionofsystem；Fastunstablepoleintheopen-looptransferfunctionofsystemWhenconductingthesystemidentification,whichmethodisnoteffectinimprovingparameterestimation?（）

答案:Usedatasetwhichiscorrespondingtothesteady-stateresponseWhatofthefollowingquantitiescanmeasuretherelativestabilityofasystem?（）

答案:gainmargin；phasemargin；robuststabilityWhatistheelementforstoringenergyinelectricalsystem?（）

答案:CapacitorWhatisaproperPIDcontrollerlike?（）

答案:WhatisaproperPIDcontrollerlike?（）Whatelectricalelementisanalogoustomasselementsinmechanicalsystems?（）

答案:InductorWhataretheObjectivesofFeedback?（）

答案:Stabilizeunstablesystems；Improvesystemperformancetomeetstringentperformancerequirements；ReducetheeffectofmodelinguncertaintyandvariousdisturbancesWhatarethemethodsforenlargingTorqueConstantoftheDCmotor?（）

答案:Increasethelengthofthecoil；Increasethenumberofarmaturecoils；Increasetheradiusofthecoil；IncreasethemagneticfieldintensityWhataretheheattransfersofthermalresistance?（）

答案:Conduction；Convection；RadiationWhataretheconsiderationswhenselectingthemodelstructuresinasystemidentificationdesign?（）

答案:Compactmodelwhichcanbestoredandusedeasily；Adequatelydescribetheactualsystem’sbehaviorforitsintendeduse；RestrictingthemodelwithinasetofknownmodelsormodelstructureswhichcanbeconvenientlystoredandeasilyanalyzedWhatapplicationscantheInternalModelPrinciplebeappliedtodealwithdisturbances?（）

答案:Harddiskdriveindustryforcompensationofrepeatablerun-outs；Roll-eccentricitycompensationinRollingMillsThereisno（）inmacroscopicthermalsystem.

答案:thermalinertiaThereisanupperlimitonthebandwidthofclosed-loopsystemsetbythemeasurementnoise.（）

答案:对Thevolumetricflowrateinfluidsystemisanalogousto（）inelectricalsystem.

答案:currentThevolumeinfluidsystemisanalogousto（）inelectricalsystem.

答案:chargeThetransferfunctionofthesystemisdependentonitsinputsignal.（）

答案:错Thetransferfunctionofalinearsystemisdependentontheinputsignals.（）

答案:错Thetotalvoltagedropalonganyclosedloopinthecircuitiszero.（）

答案:对TheTorqueConstantofthemotorareequaltotheBack-EMFConstantatanycases.（）

答案:错Thetimeconstant（）whenthespeedoftheDCMotoriscontrolledbyaproportionalgainlaw.

答案:cannotbechanged.Thesystemidentificationshouldalwaysbeconductedforasystemwithclosed-loopcontrol.（）

答案:错Thestiffnessisusedto（）.

答案:savemotionThesteady-statevaluecanbecalculatedfromFVT(FinalValueTheorem)foranystablesystems.（）

答案:错ThesteadystateangleoftheDCmotorwithoutloadforaconstantinputvoltageVcanberealized.（）

答案:错Thestablezerosofaclosed-loopsystemwillnotinfluencethetransientperformance.（）

答案:错Theprimarypurposeofintegral(I)controlis（）.

答案:toreduceoreliminatesteady-stateerror.Thepressureinfluidsystemisanalogousto（）inelectricalsystem.

答案:voltageThepolesofthetransferfunction,H(s),foragiveninput,u1(t),arethesameasthepolesofthetransferfunctionforadifferentinput,u2(t).（）

答案:对Thepolesoftheclosed-looptransferfunctionofasystem,H(s),willdependontheformofreferenceinputu(t).（）

答案:错Thepolesofatransferfunction,H(s),willinfluencethestabilityofthesystem.（）

答案:对TheorderofthesystemmodelfromtheinputvoltagetotheoutputvelocityfortheDCmotoristwo.Ifthesystemloadisincreased,thesystemmodelwillalsobechanged.（）

答案:错Thenecessaryandsufficientconditionforsystemstabilityisthatallzerosandpolesofthesystemtransferfunctionarenegativerealparts.（）

答案:错Themassisusedto（）.

答案:maintainmotionThemajorobjectiveofaddingderivativecontrolinPIDcontrolleris（）

答案:tomakethesystembetterdampedandmorestable.TheleadcompensationgenerallycausesthelocustobendtowardtheLHP,movingthedominantrootstoaplaceof（）damping.

答案:higherThelagcompensationisnormallyplacedsoneartheoriginthatithasnegligibleeffectontherootlocusinthevicinityofthedominantclosed-looproots.（）

答案:对Theinversionofasystemcanbeachievedbythefollowingkeymechanisms.（）

答案:High-gainfeedback；ModelcompensationfeedforwardTheintegralcontrolistoreduceoreliminateconstantsteady-stateerrors.（）

答案:对Theheattransfersofthethermalresistanceincludeconduction,convectionandradiation.（）

答案:对Theheatflowrateinthermalsystemisanalogousto（）inelectricalsystem.

答案:currentThefeedbackcontrollerofa2DOFcontrolsystemcanbedesignedtoincreasethebandwidthofsystemwithrespectivetoinputdisturbance.（）

答案:对Theequivalentstiffnessofspringsinseriousis（）

答案:Theequivalentstiffnessofspringsinseriousis（）Theequivalentdampingofdampersinseriousis（）

答案:Theequivalentdampingofdampersinseriousis（）Theequivalentdampingofdampersinparallelis（）.

答案:Theequivalentdampingofdampersinparallelis（）.Theeffectivecapacitancewillchangewiththetime-varyingloadmassMwhichisfloatingontopofanopentankwithaconstantcross-sectionalarea（）

答案:错Thedampinginmechanicalsystemscaneliminateenergy.（）

答案:错TheCriterionofFitinsystemidentificationistomakethediscrepancybetweenthemeasuredoutputandthepredictedoutputbe（）.

答案:assmallaspossibleThecontrolperformanceofasystemat（）iseasytobeinfluencedbythemodelerror.

答案:highfrequenciesThecontroldesignusingrobuststabilityismoreconservativethanthatofusingmarginstability.（）

答案:对Theclosed-loopperformancespecificationsinclude（）.

答案:commandfollowing；disturbanceattenuationproperties；practicalrealizability；transientresponsequalityTheclosed-loopbandwidthshouldbe（）inordertorejectmodelingerroreffectinthedesignofunitfeedbackcontrolsystem.

答案:assmallaspossibleTheclosed-loopbandwidthshouldbe（）inordertorejectinputoroutputdisturbancesinthedesignofunitfeedbackcontrolsystem.

答案:aslargeaspossibleTheclosed-loopbandwidthshouldbe（）inordertoavoidactuatorsaturationorslewrateproblemsinthedesignofunitfeedbackcontrolsystem.

答案:assmallaspossibleThechargeinelectricalsystemisanalogousto（）inmechanicalsystem.

答案:positionThecancelledpoles/zerosremainastheclosed-looppolesofthesystem.（）

答案:对Thecancelledpoles/zerosinaclosed-looptransferfunctioncannotremainasCLpolesandwillnothaveanyinfluenceonthedynamicperformanceofthesystem.（）

答案:错Thebandwidthofinnerloopcanbethesameasthatofouterloopinacascadecontroldesign.（）

答案:错Thealgebraicsumofthecurrentsatanynodeinthecircuitiszero.（）

答案:对Theadvantagesoffeedbackcontrolareto（）.

答案:reducethesteady-stateerrorinresponsetodisturbance；reducethesensitivityofatransferfunctiontoparameterchanges；stabilizeanunstableprocessSystemswithgreaterphasemargincanwithstandgreatertime-delayeffect.（）

答案:对Systemidentificationviaopen-loopexperimentscanonlybeperformedforstablesystem.（）

答案:对Statistically,theresidualshouldnotcorrelatewiththesysteminput,indicatingtheidentifiedmodelhasfullycapturedtheresponsecausedbythesysteminput.（）

答案:对Shaftinrotarymechanicalsystemsisanalogoustoatranslationalspring.（）

答案:对Radiationisheattransferviaelectromagneticwaves.（）

答案:对Nomatterdifferentexitingsignalsusedinsystemidentification,theresultingparameterestimateswillbethesame.（）

答案:错MaximumerrorwillbeverylargeifonetriestomakeCLbandwidthgreaterthanthefrequencyofresonantzeros(orimaginaryzeros).（）

答案:错It’snoneedtoidentifyreferencepointandpositivedirectionduringmodelingofmechanicalsystems.（）

答案:错Itispossibletoachievethedesiredperformanceiftheroot-locusdoesnotintersecttheperformanceregion.（）

答案:错Inertiaelementisanalogoustomassintranslationalmotion.（）

答案:对Inwhichofthefollowingcase,themodelorderofDCmotorcanbereduced.（）

答案:Thearmatureinductanceisverysmall.Inwhichcases,thepole/zerocancellationtechniquecanbeappliedtoclosed-loopcontrolsystem?（）

答案:Inwhichcases,thepole/zerocancellationtechniquecanbeappliedtoclosed-loopcontrolsystem?（）Inthemodelequation,themass,M,istheunknownvariable.（）

答案:错Inthedesignofsystemidentification,weshouldonlyimplementopenloopcontroltoobtainthemeasuredandexcitingsignals.（）

答案:错Iftheresidualerrorofsystemidentificationisnotrelatedtothesystemoutput,itshowsthatthemodelchosenforthesystemidentificationiseffect.（）

答案:错Ifthenumberofelementalequationslistedduringmodelingisnotasthenumberofinterconnectingequationsbyapplyingphysicallaws,wecanestablishthesystemmodel.（）

答案:错Iftheelectricaltimeconstanthasthesamelevelwiththemechanicaltimeconstant,theorderofthemodelfortheDCmotorcanbereduced.（）

答案:错Ifsomezerosofthesystemtransferfunction,H(s),areunstable,thesystemisdefinitelyunstable.（）

答案:错Givenasecond-ordertransferfunctionwithdampingratioζ,naturalfrequencyωnandstaticgainK.Whichparametersofa2ndordersystemaffectthepeaktime?（）

答案:Dampingratioζ；NaturalfrequencyωnForunityfeedback,systemtypewithrespecttoreferenceinputisdeterminedbythenumberofintegratorsinitsforwardpathopen-looptransferfunctionL(s).（）

答案:对Fortheopen-loopandclosed-loopsystemscomposedofequallyprecisecomponents,whichonecanachievemoreaccuracyperformance?（）

答案:Closed-loopsystemForsystemidentificationviaLSEmethod,theoriginaldynamicmodelshouldonlybelinearaslongastheregressorcanbecalculatedbasedonexperimentallyobtaineddata.（）

答案:错Forasystemwithinputdisturbancewhosedynamicshasknownstructurebutunknownparameters,itsclosed-loopsystemusingoutputfeedbackwithdisturbanceobserverisnotcompletely（）.

答案:controllableForafrequencycontrollerdesign,whatisthetypicalPerformanceSpecificationindifferentfrequenciesforsensitivityfunctionS(jω)andcomplementarysensitivityfunctionT(jω)inordertoachievegooddisturbancerejectionandrobuststabilityaswellasgoodattenuationofmeasurementnoise?(notethatωl<ωh,0答案:Forafrequencycontrollerdesign,whatisthetypicalPerformanceSpecificationindifferentfrequenciesforsensitivityfunctionS(jω)andcomplementarysensitivityfunctionT(jω)inordertoachievegooddisturbancerejectionandrobuststabilityaswellasgoodattenuationofmeasurementnoise?(notethatωl<ωh,0Feedbackcanreducethesensitivityofatransferfunctiontoparameterchanges.（）

答案:对Feedbackcanimprovethestabilityofatransferfunction.（）

答案:对Duringthedesignofsystemidentification,wealwaysshouldselectmodelstructureascomplexaspossible.（）

答案:错Convectionistheheattransferbetweentheinterfaceofasolidmaterialandafluidmaterialviabulkmotionofthefluid.（）

答案:对Conductionistheheattransferthroughsolidorcontinuousmediaviarandommolecularmotion(diffusion).（）

答案:对ByneglectingtheeffectofarmatureinductanceintheDCmotorsys