第1題第1題1.Inanopen-loopcontrolsystem,thereis().

AnofeedbackcomponentBnoactuatorCnocontroller

D

noamplificationcomponent

第2題2.Bymeasuringtheoutput,thecomponentthatproducesasignalthathasafunctionalrelationshipwiththeoutputsignaliscalled().

AfeedbackcomponentBcomparisoncomponentCgivencomponentDamplificationcomponent第3題3.Inthewatertanklevelcontrolsystem,theinputisthewaterquantityfilled

AFalseBTrue第4題4.Thecontrolsystemusesthedeviationbetweentheoutputanditsdesiredvaluetocontrolthesystem.AFalseBTrue第5題5.Thedeviationcontrolsystemisanautomaticcontrolsystem.

ATrueBFalse第6題6.Thedefectofanopen-loopcontrolsystemispooranti-disturbancecapability.ATrueB

False第7題7.Themotorspeedcontrolsystemwithtachogeneratorisanopen-loopcontrolsystem.

AFalseBTrue第8題8.Thefeedbackcontrolsystemisadeviationcontrolsystem.

ATrueBFalse第9題9.Theautomaticcontrolsystemcanbedividedinto(

)accordingtothecharacteristicsofinputsignals.A

ConstantvaluecontrolsystemB

ServocontrolsystemCDiscretecontrolsystemD

Continuouscontrolsystem正確答案：AB第10題10Thebasicrequirementsforautomaticcontrolsysteminclude().

AStabilityBRapidityCAccuracyD

Complexity正確答案：ABCWeek2Assignment第1題Chapter2Comprehensivetest第1題1.Themethodtostudythenonlinearsystemistolinearizeit.Anynonlinearsystemshouldbetransformedintoalinearsystemforanalysis.A

FalseBTrue第2題2.Thetransferfunctionisamathematicalmodel,whichcanbeobtainedbytheratioofLaplacetransformofoutputvariabletoLaplacetransformofinputvariable.A

FalseBTrue第3題3.Theformofthetransferfunctionisdifferentwhenthedisturbanceinputisdifferentfromthegiveninput,butthedenominatorofthetransferfunctionisalwaysthesame.A

FalseBTrue第4題4.ThetransferfunctionbetweenanytwonodescanbeobtaineddirectlybyusingMasonformula.A

FalseBTrueWeek3Assignment第1題Week4Assignment第1題Week5Assignment第1題Chapter3Comprehensivetest第1題7.Nomatterwhatkindofinputsignalis,thelargertheopen-loopamplificationcoefficientofthesystemis,thesmallerthesteady-stateerrorofthesystemis.A

FalseBTrue第2題6.AsystemwithoutpolesontherighthalfopenplaneoftheSplaneisastablesystem.A

FalseBTrue第3題5.Inasystem,ifonegroupofpolesisclosetotheimaginaryaxisandtheotherpolesarefarawayfromtheimaginaryaxis,thenthisgroupofpolesisthedominantpoles.A

FalseBTrue第4題4.Whenthedampingcoefficientisdifferent,thereisnofixedexpressionforthesettlingtimeofthesecond-ordersystem.A

FalseBTrue第5題3Forthesecond-ordersystem,theformofthestepresponseisdirectlyrelatedtothedampingcoefficient,sothedampingcoefficientisthemainparameterofthesystem,andtheundampedoscillationfrequencyhasnoeffectonthesystemperformanceindex.A

FalseBTrue第6題2Forthefirst-ordersystem,thedifferenceistoimprovethesystemperformanceonlybydeepeningthefeedback.A

FalseBTrue第7題1.Whenthesysteminputisaunitstepfunction,therisingtimeisthetimerequiredforthesystemoutputresponsetoreach1forthefirsttime.A

FalseBTrueWeek6Assignment第1題Week7Assignment第1題Chapter4Comprehensivetest第1題Theopen-looppolesofanegativefeedbacksystemontherealaxisinclude?1,?4(double),andtheopen-loopzerois?2.Therootlocusofthesystemontherealaxisis__________

.A[?2,?1]B(?∞,?4]

C(?4,?2)D(?1,+∞)第2題Theopen-looppolesofthenegativefeedbacksystemare?1,?4(double),andtheopen-loopzerois?2;ifthesystemhasapairofconjugatecomplexpoleswiththerealpartof?3.75,thentheotherpoleofthesystemis_________A?1.5B?1.8C?1.6D?1.2第3題Therootlocuscanonlybeusedtostudythevariationofclosed-looppoleswithrootlocusgain.第4題Whichofthefollowingfactorsaffecttheclosedlooppole.AOpenloopzerosBOpenlooppolesC

RootlocusgainDFormoffeedback

正確答案：ABCD第5題Ifthereisarootlocusbetweenanopen-looppoleandanopen-loopzeropointontherealaxis,theremustbenobreakawayandbreak-inpointbetweenthem.第6題Iftherootlociofthetwosystemsarethesame,thentheirtransferfunctionsmustbethesame.第7題Forpositivefeedbacksystem,therootlocusmustbedrawnaccordingtothelawof0degreerootlocus.第8題Thedifferencesbetweenthedrawingrulesof0orootlocusand180orootlocusinclude________AAsymptoteBRootlocusonrealaxisCDepartureangleandincidenceangleDBreakawayandbreak-inpoint

正確答案：ABC第9題Therootlocusoftheclosed-loopsystemmaystartatinfinity.

第10題Increasingtheopen-loopzeropointcanenhancetherelativestabilityandimprovethedynamicperformanceofthesystem;thefartherthezeropointisfromtheimaginaryaxis,thegreatertheinfluenceis.Week8Assignment第1題Chapter5Comprehensivetest第1題Iftheasymptoteofmagnitude-frequencycharacteristicinlow-frequencybandofminimum-phasesystemisastraightlinewithslopeof?20dB/dec,thenthesystemhas________

AoneintegralelementBtwointegralelementsCthreeintegralelementsDnointegralelement第2題Thefrequencycharacteristicofthesystemisdefinedasthedependenceofthemagnitudeandphaseofthesteady-stateresponseofthesystemontheaddedsinusoidalsignal.第3題Thefrequencycharacteristicofthesystemisdefinedasthedependenceofthemagnitudeandphaseofthesystemoutputontheaddedsinusoidalsignal.第4題ThepolarplotisthemappingonGk(s)-planewhenthevariablesinS-planechangesalongtheentireimaginaryaxis.第5題Aslongastheopen-looptransferfunctionofthesystemhaspolesattheorigin,themagnitudeofthepolarplotatw=0isinfinite.第6題IfthetransferfunctionofthesystemhasPpolesinthelefthalfofS-planeandthetimesofNyquistcurveencirclingthe(?1,j0)pointisN,thenthemainconditionforthestabilityoftheclosed-loopsystemisZ=N+P=0.

第7題TheNyquiststabilitycriterionisbasedontheopen-loopfrequencycharacteristictoanalyzethestabilityoftheclosed-loopsystem.第8題FortypeIandtypeIIopen-loopsystems,sincetheopen-loopsystemshavepolesontheimaginaryaxis(origin),thestabilityoftheclosed-loopsystemscanbedetermineddirectlybyCauchyargumentprinciple.第9題FortypeIandtypeIIopen-loopsystems,nomatterwhethertheopen-loopsystemhaspolesintherighthalfS-plane,whenusingNyquiststabilitycriteriontodeterminethestabilityoftheclosed-loopsystem,themodificationofthepolarplotanditsmirrorcurveistoaddsemicircleswithradiusof∞frompositiveimaginaryaxisinclockwisedirectiontonegativeimaginaryaxis.第10題Thefrequencyatwhichthepolarplotgoesacrossthenegativerealaxisiscalledthemagnitudecrossoverfrequency.

第11題Fortheminimumphasesystem,whentheopen-loopgainincreases,themagnitudecrossoverfrequencyofthesystemwillincrease,whilethephasestabilitymarginofthesystemwilldecrease.第12題

Intheclassicalcontroltheory,themathematicalmodelusedis_____ADifferentialequationBTransferfunctionCFrequencycharacteristicDStatespacemodel

正確答案：ABC第13題Inthelogarithmicmagnitudefrequencycharacteristicofthesystem,theordinateis___________,andtheabscissais___________.A20lgA(w)B

lgwC

P(w)DQ(w)正確答案：AB第14題Whichofthefollowingstatementsarecorrect?AIntheBodeplot,theabscissaislinearlydividedbythelogarithmicofthefrequency.BInlogarithmicmagnitude-frequencycharacteristic,theunitofordinateisdecibel(dB).CBodeplotiscomposedoftwodiagrams.

DInBodeplot,theabscissachangesby0.301unitlengthforeverytentimeschangeoffrequencyw.

正確答案：ABC第15題Thecharacteristicoftheminimumphasesystemare_____AInaclassofsystemswiththesamemagnitude-frequencycharacteristics,thephaseshiftisthesmallest,andthereisaninherentrelationshipbetweentheslopeofmagnitude-frequencycharacteristicandtheangleofphase-frequencycharacteristic.

BInaclassofsystemswiththesamemagnitude-frequencycharacteristics,thephaseshiftisthesmallest.CInaclassofsystemswiththesamemagnitude-frequencycharacteristics,thephaseshiftisthelargest.

DInaclassofsystemswiththesamemagnitude-frequencycharacteristics,thereisnorelationshipbetweentheslopeofmagnitude-frequencycharacteristicsandtheangleofphase-frequencycharacteristics.正確答案：ABWeek10Assignment第1題Chapter6ComprehensiveTest第1題PIDcontrollerinthelow-frequencyregion:①_____controllerismainlyusedtoeliminateorreducethesteady-stateerror;intheintermediateandhigh-frequencyregion,②_____controllerisusedtoimprovetheresponsespeedofthesyste