機(jī)電傳動與控制 測試題-English

TestSheetTransmissionandControlofMechatronicsNameClassScore1.selectthecorrectanswersforthefollowingstatements.1.1Whenacranehoistsdownaheavyobject,thedrivingforceofthetransmissionandcontrolsystemofmechatronicsisgivenby_____,A)theheavyobjectB)electricmotorC)theheavyobjectandtheelectricmotorD)othermechanisms1.2SeparateexcitationDCmotorscannotstartup.A)bydecreasingthevoltageB)withseriesresistanceC)directlyD)bothAandB1.3_____arebelongingtocommandingelectricdevicesintheautomaticcontrolsystems.A)BladeswitchesB)ButtonsC)ACcontactorsD)Mediumrelays1.4_____aremainlyusedfortheprolongedoverloadprotectionofelectricmotors.A)OvercurrentrelaysB)ThermalrelaysC)FusesD)Automaticswitches1.5Thecoilofarelaycanbeused_____inaPLCcontrolprogram.A)unlimitedlyB)onlytwotimesC)repeatedlyD)onlyonetime2.Judgethecorrectionofthestatements(mark√forright,×forfalse)2.1Threephaseasynchronousmotorscanstillrunwhenoneofitsphasesisbroken.√2.2Thermalrelaycanbeusedasshortcutprotection.2.3SeparateexcitationDCmotorscanreversethroughpluggingpowersupplynegatively.√2.4WhentheactivedirectionofmotortorqueTmisnotthesameasthedirectionofn,Tmisthebrakingtorque.√2.5Itisactuallytheprocedureofchangingtheirmechanicalfeaturestoadjusttherotatingspeedofelectricmotors.√3.Fillingthefollowingblankswithcorrectphrasesorstatements.3.1TherearethreetypesofresolutionforS7-200PLC.Theyare1ms,10msand__100____msrespectively.3.2IfacoilofoutputQinLADisinOFFstatus,itscorrespondingoutputrelaywillbein,afterrefreshingofoutput,thecorrespondinghardwarecoilofoutputrelaywillbe,anditsnormalopencontactorwillbe.3.3TherethreebasicprogrammingcomponentsinLADinstructionsets,theyare觸點(diǎn);線圈;and指令盒.3.4Thecoilsymbolforoffdelaytimerrelayis.Whenthecoilisswitchoff,thetimerrelaybeginstiming.Assoonastherelayreachesthepredeterminedvalue,thenormalopencontactorwillbe,andthenormalclosedcontactorwillbe.3.5TheprogramminglanguagesusedforS7-200are語句表,梯形圖,and順序功能圖.4Completethefollowingtasksaccordingtotherequirements(1)Correcttheerrorsorunreasonabledesigns(2)DrawthetimingdiagramforthefollowingLADnetworks掃描周期TI0.0I0.1掃描周期TI0.0I0.15Thefollowingdiagramrepresentsacontactor-relaycontrolcircuit.Completethetasksasfollows.(1)Whatfunctiondoesthecircuitrealize?Analyzetheworkingprocedureofthecircuitandpointoutthefunctionsofthemaincomponents.(2)Convertthecontactor-relaycontrolcircuitintotheLADprogramusingS7-200PLCprogrammingmethod.Requirements:givingtheI/Otable,drawfieldwiringdiagram，thenconvertthecircuitintothereasonableLADprogram.6.DesignproblemDesignaLADprogramsatisfyingthefollowingtimingdiagram.I.selectthecorrectanswersforthefollowingstatements(1scoreforeach，andtotally10scores)II.Judgethecorrectionofthestatements(mark√forright,×forfalse,2scoreforeach，andtotally20scores)III.Fillingthefollowingblankswithcorrectphrasesorstatements.(1scoreforeach，20scorestotally)IVCompletethefollowingtasksaccordingtotherequirements（12scores）1.Correcttheerrorsorunreasonabledesigns(9scores)2.Drawthetimi