机电系统的建模、辨识与控制（双语）知到智慧树章节测试课后答案2024年秋浙江大学

机电系统的建模、辨识与控制（双语）知到智慧树章节测试课后答案2024年秋浙江大学第一章单元测试

Ifthenumberofelementalequationslistedduringmodelingisnotasthenumberofinterconnectingequationsbyapplyingphysicallaws,wecanestablishthesystemmodel.（）

A:对B:错

答案:错It’snoneedtoidentifyreferencepointandpositivedirectionduringmodelingofmechanicalsystems.（）

A:对B:错

答案:错Thestiffnessisusedto（）.

A:maintainmotionB:transformmotionC:eliminatemotionD:savemotion

答案:savemotionThemassisusedto（）.

A:transformmotionB:maintainmotionC:savemotionD:eliminatemotion

答案:maintainmotionInthemodelequation,themass,M,istheunknownvariable.（）

A:对B:错

答案:错

第二章单元测试

Shaftinrotarymechanicalsystemsisanalogoustoatranslationalspring.（）

A:对B:错

答案:对Theequationofmotion(EOM)forthefollowingsystemis（）.

A:,B:C:D:

答案:Theequivalentdampingofdampersinparallelis（）.

A:B:C:D:

答案:Whichofthefollowingelementscanabsorbenergy?（）

A:BearingB:SpringC:BushingD:Translationaldamper

答案:Bearing；Bushing；TranslationaldamperInertiaelementisanalogoustomassintranslationalmotion.（）

A:对B:错

答案:对

第三章单元测试

Thetotalvoltagedropalonganyclosedloopinthecircuitiszero.（）

A:对B:错

答案:对TheTorqueConstantofthemotorareequaltotheBack-EMFConstantatanycases.（）

A:对B:错

答案:错Whatistheelementforstoringenergyinelectricalsystem?（）

A:CapacitorB:InductorC:ResistorD:CurrentSource

答案:CapacitorThechargeinelectricalsystemisanalogousto（）inmechanicalsystem.

A:positionB:forceC:massD:velocity

答案:positionWhatarethemethodsforenlargingTorqueConstantoftheDCmotor?（）

A:IncreasetheradiusofthecoilB:IncreasetheinputvoltageC:IncreasethelengthofthecoilD:IncreasethemagneticfieldintensityE:Increasethenumberofarmaturecoils

答案:Increasetheradiusofthecoil；Increasethelengthofthecoil；Increasethemagneticfieldintensity；Increasethenumberofarmaturecoils

第四章单元测试

TheorderofthesystemmodelfromtheinputvoltagetotheoutputvelocityfortheDCmotoristwo.Ifthesystemloadisincreased,thesystemmodelwillalsobechanged.（）

A:错B:对

答案:错ThesteadystateangleoftheDCmotorwithoutloadforaconstantinputvoltageVcanberealized.（）

A:对B:错

答案:错Seethevoicecoilinastereospeaker,whichisanelectro-mechanicalsystem.Pleaseindicatetheelectro-mechanicalcouplingsubsystemintheblockdiagram(Multiplechoices).（）

A:B:C:D:

答案:；Inwhichofthefollowingcase,themodelorderofDCmotorcanbereduced.（）

A:Thearmatureinductanceisverysmall.B:Themechanicalloadissmall.C:Theinertiaoftherotorisverysmall.D:Thearmatureresistorisverysmall.

答案:Thearmatureinductanceisverysmall.Iftheelectricaltimeconstanthasthesamelevelwiththemechanicaltimeconstant,theorderofthemodelfortheDCmotorcanbereduced.（）

A:对B:错

答案:错

第五章单元测试

Theeffectivecapacitancewillchangewiththetime-varyingloadmassMwhichisfloatingontopofanopentankwithaconstantcross-sectionalarea（）

A:对B:错

答案:错Anorificecanberegardedasafluidresistance（）

A:错B:对

答案:对WhichfluidelementisrelatedtotheWaterHammerEffect?（）

A:FluidcapacitanceB:FluidresistanceC:FluidinertanceD:Pressurepump.

答案:FluidinertanceSeethehydraulicactuatorsystembelow,thehydraulic-mechanicalcouplingsubsystemisdescribedby（）

A:B:C:D:

答案:Whichofthefollowingelementcanberegardedasafluidcapacitance?（）

A:OrificesB:HydrauliccylinderchamberC:LongpipeD:Accumulator

答案:Hydrauliccylinderchamber；Accumulator

第六章单元测试

Theheatflowrateinthermalsystemisanalogousto（）inelectricalsystem.

A:currentB:resistorC:voltageD:charge

答案:currentThereisno（）inmacroscopicthermalsystem.

A:thermalresistanceB:thermalinertiaC:thermalcapacitanceD:heatsource

答案:thermalinertiaConductionistheheattransferthroughsolidorcontinuousmediaviarandommolecularmotion(diffusion).（）

A:对B:错

答案:对Radiationisheattransferviaelectromagneticwaves.（）

A:对B:错

答案:对Convectionistheheattransferbetweentheinterfaceofasolidmaterialandafluidmaterialviabulkmotionofthefluid.（）

A:错B:对

答案:对

第七章单元测试

Thesteadystateresponseintheequationofmotion,withpositiveMandK,toastepaccelerationfort>0,is–MA/K.（）

A:对B:错

答案:错Aclose-loopsystemwithatransferfunctionofisunstable.（）

A:错B:对

答案:错Thetimeconstant（）whenthespeedoftheDCMotoriscontrolledbyaproportionalgainlaw.

A:canbechanged.B:cannotbechanged.C:isdependentontheproportionalgain.D:isdifferentfromtheDCMotorwithoutthecontroller.

答案:cannotbechanged.WhataretheObjectivesofFeedback?（）

A:StabilizeunstablesystemsB:ImprovesystemperformancetomeetstringentperformancerequirementsC:GettheaccuratemodelofthesystemD:Reducetheeffectofmodelinguncertaintyandvariousdisturbances

答案:Stabilizeunstablesystems；Improvesystemperformancetomeetstringentperformancerequirements；ReducetheeffectofmodelinguncertaintyandvariousdisturbancesTheinversionofasystemcanbeachievedbythefollowingkeymechanisms.（）

A:AnyopenloopcontrolB:Small-gainfeedbackC:ModelcompensationfeedforwardD:High-gainfeedback

答案:Modelcompensationfeedforward；High-gainfeedback

第八章单元测试

Thecontroldesignusingrobuststabilityismoreconservativethanthatofusingmarginstability.（）

A:对B:错

答案:对Systemswithgreaterphasemargincanwithstandgreatertime-delayeffect.（）

A:对B:错

答案:对Aunitfeedbackcontrolsystemisconsistingofthecontroller,,andtheplant,theclosed-loopsystemis（）

A:uncertaintojudgeitsstability.B:alwaysstable.C:notinternalstability.D:iternalstability.

答案:notinternalstability.Whichofthefollowingisastablesystem?（）

A:B:C:D:

答案:Whatofthefollowingquantitiescanmeasuretherelativestabilityofasystem?（）

A:steady-stateerror.B:robuststabilityC:phasemarginD:gainmargin

答案:robuststability；phasemargin；gainmargin

第九章单元测试

Thepolesoftheclosed-looptransferfunctionofasystem,H(s),willdependontheformofreferenceinputu(t).（）

A:对B:错

答案:错Forunityfeedback,systemtypewithrespecttoreferenceinputisdeterminedbythenumberofintegratorsinitsforwardpathopen-looptransferfunctionL(s).（）

A:对B:错

答案:对Giventhefeasibledesignregiondetailedbelow,whichofthefollowingbestdescribestheimposed2%bandsettlingtimeconstraint.（）

A:ts≤4sB:ts≤2sC:ts≤8sD:ts≤1s

答案:ts≤4sSeethefollowingblockdiagramofasystem,whatistheappropriatecontrollerstructureforachievingzerosteady-stateoutputifd(t)isarampinputdisturbance?（）

A:B:C:D:

答案:Givenasecond-ordertransferfunctionwithdampingratio,naturalfrequencyandstaticgainK,whichparametersofthe2ndordersystemaffectthesettlingtime?（）

A:dampingratioB:AllofthemC:staticgainKD:naturalfrequency

答案:dampingratio；naturalfrequency

第十章单元测试

Thesystemidentificationshouldalwaysbeconductedforasystemwithclosed-loopcontrol.（）

A:对B:错

答案:错Duringthedesignofsystemidentification,wealwaysshouldselectmodelstructureascomplexaspossible.（）

A:错B:对

答案:错WhichofthefollowingscanenhancetheSNR.（）

A:Usingfastinput.B:UsingaslargeinputsaspossibleC:Usingactuatorwithfastresponse.D:Usingsensorwithsmallmeasurementnoise.

答案:Usingaslargeinputsaspossible；Usingsensorwithsmallmeasurementnoise.TheCriterionofFitinsystemidentificationistomakethediscrepancybetweenthemeasuredoutputandthepredictedoutputbe（）.

A:aslargeaspossibleB:anyvalueC:assmallaspossibleD:zero

答案:assmallaspossibleWhenthereisnomodelstructureerror,thenecessaryconditionofmodelparametersaccuratelyRecoveredis（）.

A:touseanappropriateinputsignal.B:theregressormatrixhasafullcolumnrankC:tousecomplexmodelstructureD:touselargeSNR

答案:theregressormatrixhasafullcolumnrank

第十一章单元测试

Itispossibletoachievethedesiredperformanceiftheroot-locusdoesnotintersecttheperformanceregion.（）

A:错B:对

答案:错Theintegralcontrolistoreduceoreliminateconstantsteady-stateerrors.（）

A:对B:错

答案:对Theoutputofagenericclosed-loopsystemisgivenby,whereisthesystem'sreferenceinputandisthesystem'sdisturbanceinput.Ideally,thetransferfunctions,and,shouldbeoftheform（）

A:GYR=1,GYT=1B:GYR=0,GYT=1C:GYR=1,GYT=0D:GYR=0,GYT=0

答案:GYR=1,GYT=0ThemajorobjectiveofaddingderivativecontrolinPIDcontrolleris（）

A:toensuresystemsremainlinear.B:tomakethesystembetterdampedandmorestable.C:toreduceoreliminatesteady-stateerror.D:toimprovetransientperformancemetrics,suchassettlingtimeandovershoot.

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

A:B:.C:D:.

答案:；.

第十二章单元测试

AproperPIDcontrollercanrealizeanarbitrarypoleplacementforathird-ordersystem.（）

A:对B:错

答案:错Thecancelledpoles/zerosinaclosed-looptransferfunctioncannotremainasCLpolesandwillnothaveanyinfluenceonthedynamicperformanceofthesystem.（）

A:错B:对

答案:错Thecancelledpoles/zerosremainastheclosed-looppolesofthesystem.（）

A:对B:错

答案:对WhatisaproperPIDcontrollerlike?（）

A:B:C:D:

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

A:AllofthemB:DampingratioζC:StaticgainKD:Naturalfrequencyωn

答案:Dampingratioζ；Naturalfrequencyωn

第十三章单元测试

Aslowunstablezerointheopen-looptransferfunctionofsystemwillproducelargeovershootinthestepresponse.（）

A:错B:对

答案:错MaximumerrorwillbeverylargeifonetriestomakeCLbandwidthgreaterthanthefrequencyofresonantzeros(orimaginaryzeros).（）

A:对B:错

答案:错Theclosed-loopbandwidthshouldbe（）inordertorejectinputoroutputdisturbancesinthedesignofunitfeedbackcontrolsystem.

A:assmallaspossibleB:notconsideredC:undeterminedD:aslargeaspossible

答案:aslargeaspossibleTheclosed-loopbandwidthshouldbe（）inordertoavoidactuatorsaturationorslewrateproblemsinthedesignofunitfeedbackcontrolsystem.

A:notconsideredB:assmallaspossibleC:undeterminedD:aslargeaspossible

答案:assmallaspossibleWhendesignofunitfeedbackcontrolsystem,whichofthecaseswillresultinlargeovershootinthestepresponse.（）

A:Fastunstablepoleintheopen-looptransferfunctionofsystemB:Slowunstablezerointheopen-looptransferfunctionofsystemC:Slowstablezerointheopen-looptransferfunctionofsystemD:Slowunstablepoleintheopen-looptransferfunctionofsystem

答案: