移动车库设计的外文翻译

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<文献翻译一：原文>FiniteAnalysisandResearchofLift-slidingStereoGarageStructureLongbiaoZhu,HuiWang,JingliangWang,LiuPeng,TianchengZhu,ZhihuiZhu.FiniteAnalysisandResearchofLift-slidingStereoGarageStructure[A].InformationEngineeringResearchInstitute,USA.Proceedingsof20163rdInternationalConferenceonMechanicLongbiaoZhu,HuiWang,JingliangWang,LiuPeng,TianchengZhu,ZhihuiZhu.FiniteAnalysisandResearchofLift-slidingStereoGarageStructure[A].InformationEngineeringResearchInstitute,USA.Proceedingsof20163rdInternationalConferenceonMechanical,Industrial,andManufacturingEngineering(MIME2016)[C].InformationEngineeringResearchInstitute,USA:智能信息技术应用学会,2016:10.ABSTRACT:Thepapertookthelift-slidingstereogaragewithfourfloorsandsixcolumnsastheresearchobject,establishedsteelstructurefinitemodel,determinedtheloadtypeandputforwardloadconversionmethods.Onthisbase,aimingatsteelstructurefinitemodel,staticanalysis,modelanalysis,dynamicanalysisandseismicresponsespectrumanalysiswerecarriedout.Itcalculatedandobtainedthemaximumdisplacementofthebeams,steelstructureinherentfrequencyandvibrationmodeaswellasdisplacementchangesofsteelstructureundertheactionofseismicload.Thesimulationresultsshowthestiffnessofsteelstructurecanmeetthedesignrequirementforresisting8gradewindandM7earthquake,andhasgreatsafetymargin.1INTRODUCTIONInrecentyears,withtherapiddevelopmentofnationaleconomy,thedramaticincreaseoftheconsumerswhopossessthecarleadstoamajorityofsocialproblems,suchastrafficcongestionandthedifficultyofparking,etc,andseriouslyaffectsthepeople'slivingenvironment,therefore,solvingthedifficultiesofparkinghasbecomeaurgentsocialproblemtoberesolved.However,thelift-slidingstereogaragebecomesthemostwidelyusedparkingequipmentintermsoftheadvantagesthatincludesmalllandoccupied,amajorityofeffectiveandconvenientparkingstalls,convenientlyparkingandtakingcars,lowercostofconstructionandmaintenanceaswellashighersafetyandreliability.Basedonthecomplexityofbearingofgaragestructure,theadditionofloadcanleadtothelargerdeformationontheweakpartsofthestructure,whichaffectstheoverallperformanceandevencausessomeunpredictablesafetyaccidentsofthefailureofthegarage.Toassurethesafe,reliableandefficientoperationofthegarage,itisverynecessarytodothesimulationaboutfiniteelementanalysisonthegaragestructureforensuringthatstructurehasenoughstrength,stiffnessandstability.Takingliftslidingstereogaragewith4floorsand6columnsastheresearchobject,thedrivingmodeofacombinationofmotor,chainandsteelwirerope,theverticalspeedandtransversespeedarerespectively5m/minand8m/min.Thegaragebuiltmustmeettherequirementofresisting8gradewindandM7earthquake.2CREATEFINITEELEMENTMODELOFGARAGESTRUCTUREPlaneviewoflift-slidingstereogaragewith4floorsand6columnsisshownasfigure1,itismainlycomposedofbearingframe,liftingmotor,trailerpalletandmovabletrailerframe.Forstereogaragebelongtoakindofthelarge,highredundancyandcomplexstructuresystem,itisdifficulttodirectlydofiniteelementanalysisofthegarage,sobeforecarryingoutthesimulation,thestructureofgaragemustbereasonablysimplified.Figure1.Planeviewoflift-slidingstereogarage.Thesteelstructureofgaragesimplifiedisshownasfigure2,itismainlycomposedoffrontandrearcolumns,frontandrearbeams,longitudinalbeamsandinclinedsupports.ThematerialisQ235,elasticmodulusE=2.0×1011pa,poisson'sratioµ=0.3,thedensityρ=7850kg/m3.ThespecificationofcolumnisH200*100,specificationoflongitudinalbeamsarerespectivelyH300*150andH200*200,specificationofhalfH-beam’sisH200*100,specificationofinclinedsupportisH50*50.ThepaperchoseANSYSsoftwaretocreatefiniteelementmodelofsteelstructurethroughtheparameterizedmethod.Intheprocessofbuildingthemodel,thebeams,columnsandinclinedsupportadoptBEAM188unit,thestyleofconnectionofthecomponentsisrigid[1].ThedistancebetweenadjacentparkingstallofthegarageinXdirectionis2.5m,thedistanceinZdirectionis6.4m,theheightoffirstflooris2.54m,theheightofeachfloorsfromthesecondfloortotheforthflooris1.7m.Themodelbuilthasfourfloorsandsixcolumns,andcanprovide21parkingstalls.ThegaragegivesprioritytoDtypeofcars,thesizeofvehicleis5000mm×1850mm×1550mm,theweightis1700kg,theweightofcalculationis2000kg.Figure2.Steelstructureofstereogaragesimplified.3STATICSANALYSISOFGARAGESTRUCTURETheloadsofsteelstructureofstereogaragearedividedintofourcategories,whichincludeconstantload,variableload,windloadandearthquakeload.Theconstantloadismadeupofbearingframe,trailerpallet,liftingandtransferringmotor,andmovabletrailerframeandsoon,applyingthespecificmechanicsformulacalculatestheconstantload,andthentheloadconvertedisallottedtothenodesbearingloadsofsteelstructure.Thevariableloadincludesvehicleload,snowload,andweightofstaffandequipment,etc.Inthispaper,itonlyconsiderscarloadandsnowload.Forcarload,accordingtotherate,itisabletobeevenlyallottedtothenodesbearingloadsofsteelstructurethroughfourpadlocksfromthetrailerpallet[2].Snowloadandwindloadhavesimilarconversionmethod,butthesnowloadisuniformlydistributedtothenodesbearingloadsofsteelstructureontheroofofgarage.Intheprocessoftrailerpalletthatbearsthecarmovingalongthehorizontaldirection,itwillimpactonsteelstructure.Theimpactloadcanbecalculatedthroughthemethodof1.25timesoffullmassthatincludestheloadoftrailerpallet,movabletrailerframeandthecar,anditusuallyisaddedtothenodesbearingloadsofsteelstructureonthesecondandthirdfloor.Themonsoonhavinganeffectontheanti-winddevicecanproducewindload.Thewindloadiscalculatedwiththelinearconversionmethodandevenlyallottedtosteelstructure[3].Theearthquakewillgenerateseismicloadthatisimposedtothegaragestructure,therefore,theseismicloadcanbecalculatedwiththeconversionmethod,andthenaddedtosteelstructureintheformofacceleration[4].Accordingtoloadconditions,theforcestatusofmodelcanbedividedintothetwocategoriesofemptyloadandfullloadconditions.Theload-calculatingundertheconditionofemptyloadismainlymadeupoftheconstantloadsthatincludebearingframe,trailerpallet,motor,movabletrailerframe,etc,butexceptforvehicleloads.Theload-calculatingundertheconditionoffullloadisconsistedoftheconstantloadundertheconditionofemptyloadandtheloadofthecarparkingonthetrailerpallet.3.1ConversionofloadThemassoftrailerpalletis400kg,themassofliftingmotoronthesecondandthirdflooris60kg,themassofliftingmotorontheforthflooris70kg.themassoftransversemotoris8kg.Themassofmovabletrailerframeis1000kg.Dtypeofthecaris1700kg,themassoftheload-calculatingis2000kg.Theweightofthefrontaxleis7kN,theweightoftherearaxleis13kN.Itcanobtainthedatumofloadsunderthetwoworkingconditionsofemptyloadandfullloadthroughtheconversionprocessing[5].AccordingtoAHandbookofArchitectureStructureLoadDesign[6],itcandeterminethecalculationformulaofstandardvalueofsnowload:SIntheformula,Skisthestandardvalueofsnowload,theunitisonethousandnewtonpersquaremeter,µrisdistributioncoefficientofroofsnow,anditsvalueis1.0inthispaper,S0isbasicsnowpressureanditsvalueis0.25kN/m.Intheanalysisofstaticsanddynamics,thecombinationcoefficientofsnowloadisusually0.7,themostunfavorablecombinationcoefficientofsnowloadis0.98,whichhasannegativeeffectonsteelstructure.Intheprocessofseismicanalysis,thecombinationcoefficientofthevariableloadis0.5.Basedontheabovedatum,itcancalculatetheloadsthatroofsnowofthegaragegenerates,andthensnowloadconvertedisaddedtothenodesbearingloadsofsteelstructureontheroofofthegarage.3.2ConversionofloadChoosingANSYSsoftwarecreatesfiniteelementmodelwiththeparameterizedmethod,andthenthemodelismeshed,itcanobtain1108unitsand2080nodes.Undertheconditionofstaticsmodule,itcansetupthesolvercontroloption,addthedisplacementconstraintstothebottomofthecolumns,andequivalentlyaddtheloadstothenodesofsteelstructure[7].Inordertogetthedeformationofsteelstructure,findouttheweakpositionofsteelstructure,anddeterminewhetherthesteelstructureisabletomeetthedesignrequirementsornot,thestaticsanalysisunderthetwoworkingconditionsofemptyloadandfullloadiscarriedout.Thestaticsnephogramofsteelstructureisshownasfigure3andfigure4.Basedonthedatumoffigure3,figure4andtable1,undertheworkingconditionsofemptyloadandfullload,itcancometotheconclusionthatthemaximumdeformationofYdirectionandthetotalvectordisplacementofsteelstructureislocatedattheupperlongitudinalbeamthatplaysanroleofsupport,andbendingdeformationofthelongitudinalbeamoccurredalongthenegativeYdirection.Theresultsofsimulationshowthemaximumdeformationofthetotalvectordisplacementliesinthemiddlelocationoflongitudinalbeamontheforthfloorandfifthcolumn,thevaluesofdeformationarerespectively1.594mmand2.381mm.Accordingtodesignrequirements,allowabledeflectionvaluesoflongitudinalbeamandcrossbeamarerespectively12.8mmand15.2mm,thedeformationvalueshouldnotbegreaterthanrespectiveallowabledeflectionvalue.Undertheconditionoffullload,themaximumdeformationvaluesoflongitudinalbeamandcrossbeamarelessthantheallowabledeflectionvalue,soitsstiffnesscanmeetthedesignrequirements.Table1.Maximumdeformationvaluesofsteelstructureunderdifferentworkingconditions.Figure3.Displacementchangenephogramofsteelstructureundertheconditionofemptyload.Figure4.Displacementchangenephogramofsteelstructureundertheactionoffullload.

<文献翻译一：译文>升降式立体车库结构有限元分析与研究摘要：以四层六柱升降式立体车库为研究对象，建立了钢结构有限元模型，确定了荷载类型，提出了荷载转换方法。在此基础上，针对钢结构有限元模型，进行了静力分析、模型分析、动力分析和地震反应谱分析。计算得到了地震荷载作用下梁的最大位移、钢结构的固有频率和振型以及钢结构的位移变化。仿真结果表明，钢结构刚度满足8级风和7级地震的设计要求，具有较高的安全性。一、引言近年来，随着国民经济的大幅增长，拥有汽车的消费者增多，造成了许多的社会问题如交通拥堵和停车难等，产生了严重影响。因此，对于人的生存环境问题,解决停车难已成为社会迫在眉睫的、有待解决的大事。所以，升降式立体车库成为应用最广泛的停车场。升降式立体车库的优点包括：占地面积小、提供较多的停车位、方便停车、降低建设成本和维护以及更高的安全性和可靠性。基于车库轴承的复杂结构中，荷载的增加会导致结构薄弱部分的变形，会影响整体表现，甚至会发生一些不可预知的车库的故障，甚至安全事故。为了确保安全、可靠和车库的高效运转，有限元分析仿真车库结构是非常必要的，可以确保结构具有足够的强度、刚度和稳定性。本文以4层6柱升降式立体车库为例研究对象，一个正在运行的电机，由链条和钢丝绳组合，其垂直速度和横向速度分别是5m/min和8m/min。建造的车库必须满足符合抵抗8级风和M7地震的要求。二、建立有限元模型车库结构图1为4层6列的升降式立体车库的平面图，主要由轴承架，升降马达，拖车托盘和可移动拖车框架组成。由于立体车库属于大型，高冗余，结构复杂的系统之一，很难直接对车库进行有限元分析，因此在进行仿真之前，必须合理简化车库的结构。图1升降式立体车库平面图简化后的车库钢结构如图2所示，主要由前后柱，前后横梁，纵梁和倾斜支撑组成。材质为Q235，弹性模量E=2.0×1011pa，泊松比µ=0.3，密度ρ=7850kg/m3。柱的规格为H200*100，纵梁的规格分别为H300*150和H200*200，半H型钢的规格为H200*100，倾斜支撑的规格为H50*50。本文选择ANSYS软件通过参数化方法建立钢结构有限元模型。在建立模型的过程中，梁、柱和倾斜支撑采用BEAM188单元，构件的连接方式是刚性的[1]。车库的相邻停车位之间在X方向上的距离为2.5m，在Z方向上的距离为6.4m，第一层的高度为2.54m，从第二层到第四层的每层高度为1.7m。建造的模型有四层、六列，可提供21个停车位。车库优先使用D型汽车，汽车尺寸为5000mm×1850mm×1550mm，重量为1700kg，计算重量为2000kg。图2立体车库钢结构简化三、车库结构的统计分析立体车库的钢结构荷载分为恒荷载，变荷载，风荷载和地震荷载四类。恒定载荷由轴承架、拖车托盘、起重和运输马达以及可移动的拖车框架等组成，应用特定的力学公式计算出恒定载荷，然后将转换后的载荷，分配给钢结构体的承重节点。变荷载包括车辆荷载，雪荷载以及人员和设备的重量等。在本文中，它仅考虑车荷载和雪荷载。对于轿厢负载，可以根据比率，通过挂车托盘上的四个挂锁将其平均分配给承受钢结构负载的节点[2]。雪荷载和风荷载具有相似的转换方法，但是雪荷载均匀地分布在车库屋顶上的承受钢结构荷载节点上。在承载汽车的拖车托盘沿水平方向移动过程中，它将对钢结构产生影响。冲击载荷可以通过质量的1.25倍的方法计算得出，其中包括拖车托盘，活动拖车框架和轿厢的载荷，通常将其添加到承受第二层和第三层钢结构载荷的节点上。影响防风装置的季风会产生风荷载。用线性转换法计算风荷载并将其平均分配给钢结构[3]。地震会产生施加在车库结构上的地震荷载，因此，可以用转换方法计算地震荷载，然后以加速度的形式添加到钢结构中[4]。根据载荷情况，模型的受力状态可分为空载和满载两种。空载条件下的载荷计算主要由轴承架、拖车托盘、电动机、活动拖车架等恒定载荷组成，但车辆载荷除外。满载条件下的载荷计算包括空载条件下的恒定载荷和拖车托盘上的停车场的载荷。3.1负载转换拖车托盘的质量为400kg，第二和第三层的起重电动机的质量为60kg，第四层的起重电动机的质量为70kg。横向电机的质量8kg。可移动拖车架的质量为1000kg。D型车为1700kg，计算负荷的质量为2000kg。前轴的重量为7kN，后轴的重量为13kN。通过转换处理可以得到空载和满载两种工况下的载荷数据[5]。根据《建筑结构荷载设计手册》[6]，可以确定雪荷载标准值的计算公式：S公式中，Sk为雪荷载的标准值，单位为千牛顿/平方米，µr为屋顶雪的分配系数，本文值为1.0，S0为基本雪压，值为0.25千牛/米。在静力学和动力学分析中，雪荷载的组合系数通常为0.7，最不利的雪荷载的组合系数为0.98，这会对钢结构产生不利影响。在地震分析过程中，变荷载的组合系数为0.5。根据以上数据，可以计算出车库屋顶积雪产生的载荷，然后将转换后的积雪载荷加到车库屋顶承受钢结构载荷的节点上。3.2负载转换选择ANSYS软件，通过参数化方法创建有限元模型，然后对该模型进行网格划分，可获得1108个单位和2080个节点。在静力学模块的条件下，它可以设置求解器控制选项，在柱的底部添加位移约束，并等效地将载荷添加到钢结构的节点[7]。为了得到钢结构的变形，找出钢结构的薄弱位置，确定钢结构是否满足设计要求，在空载和满载两种工况下进行静力分析。钢结构的静电云图如图3和图4所示。根据图3，图4和表1的数据，在空载和满载的工作条件下，可以得出以下结论：Y方向的最大变形和钢结构的总矢量位移位于上方纵梁起支撑作用，纵梁的弯曲变形沿负Y方向发生。仿真结果表明，总矢量位移的最大变形位于纵梁在第四层和第五列的中间位置，变形值分别为1.594mm和2.381mm。根据设计要求，纵梁和横梁的允许挠度值分别为12.8mm和15.2mm，变形值应不大于相应的允许挠度值。在满载条件下，纵梁和横梁的最大变形值均小于允许的挠度值，因此其刚度可以满足设计要求。表1不同工况下钢结构的最大变形值图3空荷载作用下钢结构位移变化云图图4全荷载作用下钢结构位移变化云图<文献翻译二：原文>DesignofFiveParkingLiftingStereoGarageBasedonS7-200ChenHuiqin,ChenYulin.DesignofFiveParkingLiftingStereoGarageBasedonS7-200[A].ResearchInstituteofManagementScienceandIndustrialEngineering.Proceedingsof20172ndInternationalConferenceonEducation,Sports,ArtsandManagementEngineering(ICESAME2017)[C].ResearchInstituteofManagementScienceandIndustrialEngineering:计算机科学与电子技术国际学会(ComputerScienceandElectronicTechnologyInternationalSociety),2017:5.Abstract:Thestereogaragehasbecomeanimportantmeansanddevelopmenttrendstosolvetheproblemofcity’sparkingdifficulty.Inthispaper,ittakestwo-layerandfive-locationoflift-slidingstereogarageforexample,instroducingitssystemstructureandworkingprocess,focusingonitsComponent,SoftwareandhardwaredesignbaseonS7-200.Itimplementsautomaticaccessvehicle,operationmonitoringandfaultalarmforstereogarage.Keywords:lift-sliding;stereogarage;controlsystem;S7-200;design1IntroductionWiththeimprovementoflivingstandardandthedevelopmentofeconomy,automobileintothemostfamilies,becomethemostpeople'smeansoftransport,buttospeeduptheprocessofurbanization,therapiddevelopmentofrealestateindustry,makingurbanspacemoreandless,theparkingproblemhasbecomeoneoftheproblemsurgentlytobesolvedinthecity,thetraditionalplanetypeparkinghadgoneintoadeadend,intotheairtoparkingspaces,implementingstereoparkingissolutionfastparkingproblemtheonlywaytobigcities,variousthree-dimensionalgaragespringinguplikegetrapiddevelopment.Three-dimensionalgaragetypeliftingandtransferringverticalcirculationtype,horizontalcirculationtype,multicirculatingtypeetc..Indevelopedcountries,theapplicationofup-downandtranslationstereogaragehasahistoryofnearly30.Japan,Germanyandothercountrieshaveformedaseriesofmaturetechnologyofup-downandTranslationStereogarage.Theup-downandtranslationhassimplestructure,convenientoperation,accordingtothesafety,reliability,lowcost,etc.,inthedomesticmarketofthestereogarageoccupiesanabsoluteadvantage.Thedesignforthedouble5carliftslidinggarage,twolayersofthree-dimensionaldesign:onelayerandtwolayer.Thetwolayermobileonlyliftingboard,ahorizontalboardlayeronlytranslationalmotion.Theup-downandtranslationstereogaragesysteminatotalofsixparkingspaces,includingavacancywiththetemplatetheriseandfallofthechannel,theotherfivespaceswiththetemplatecanbeusedforstorageofvehicles.Alayerofparkingspacesforparkingortakingthecarsignals,donotneedtomovetheotherfivefloorsforparkingandtakingoutofthecar.Secondlayerofparkingspacesforparkingortakingthecar,shouldfirstdeterminethecorrespondinglayerifthepositionisempty,ifnotemptytoshifttoalayer,untilthebottomoftheemptytowerefallingactionreachalayer,andthentoparkingthecar,inandoutofthecarafterrisingbacktoitsoriginalposition.Thesystemstructureisshowninfigure1.Figure1.Systemstructurediagram2SolidGarageSystem2.1controlsectionControlsystemofliftingandtransferringgarageisthevehicleaccesscommandcenterisaprerequisiteforrealizingintelligent.Mainlyconsistsofthemaincircuitandcontrolcircuit.Themaincircuitcontrolloadtheriseandfallofthefloorsandshifting.Theequipmentismainlytraversingasmallmotorandaliftingmotor,inordertorealizethemotorrunningsmoothly,nonoise,lowenergyconsumption,highaccuracyandhighspeed,traverseasmallmotormainlyadoptsgearreducer,largeliftingmotormainlyadoptsspecialbeltbrakereducer,speedcontrolsystemusingACvariablefrequencyspeedregulation;controlcircuitismainlydesignedforthesafetyofthecar,thevariouscontrolloops.Thecontrolsystemisdividedintohardwarepartandsoftwarepart.Themainoperatingmodesofthecontrolsystemaredividedintotwotypes,automaticoperationmodeandmanualoperationmode.Referstotheso-calledautomaticoperationmode,whentheoperatorinputandoutofthegaragepasswordandparkingnumber,pressconfirmationkey,remotecontrolandoperationsystem,garagetrayliftingandtraversingactionwillautomatically,whenthesetofparkingspacesatgroundlevel,userscanwilldrivethecarcarryingboard,orfromthecarcarriesthetemplatetoremovethecar.Theautomaticmodeismainlyusedfornormalusers,theoperatorinputsignalremotecontroloperationofthegarage.Theso-calledmanual(orpoint)operationmodeoperationpersonneloperatedseparatelycontinuousorintermittentoperationofacertainaction,suchasacarliftalone,aloneshifting,theoperationmodeforgaragemanagementpersonneloroperationandmaintenancepersonneltouse.2.2ThepartofliftingandslidingtransmissionLiftingdriveisthemainpartofthegaragedrivesystem,whichisresponsibleforthemovementsofpalletandvehicle.Themotorandachaindrivedevicetemplatefromtheunderlyingspacesascendtotheupperparkingspaces,orthetemplatefromtheupperparkingfelltothebottomofparkingspacestoachievelifttruckaccess.Liftingdrivepartiscomposedofmotor,frequencyconverter,chainwheel,chainandsoon.Duringoperating,electricmotordrivesthechainwheels,thechainwheeldrivethechain.Thetraymoveupanddownthroughthecontrolofmotor’srotationdirection.Duringaccesstothevehicle,theliftingsystemistobeaccessedbythevehicletoadesignatedpositionbytheparkingtrayortodropthetraycarryingthevehiclefromthespecifiedposition.Transversetransmissionsystemisresponsibleforparkingtray’smovementonthebeam.Traversingtransmissionmechanismconsistsofmotor,inverter,drivingwheelandrail.Bottomtraversedrivesystemareintegratedwithvehicles,transversetransmissionsystemoftheotherlayersareplacedontheparkingframe.Driveshaftworkperformanceisgoodorbadwilldirectlyaffecttheworkingconditionofthewholegarage.Accordingtotheworkingprincipleofthelift-slidingstereogarage,carcarrier,exceptthetoplayerone,shouldmoveleftandrightthroughslidingrailineachlayer.Withthesemovement,theuppercarcarrierwillhaveenoughspace.2.3SteelstructureframeThesteelframestructureismainlycomposedofbeams,rails,rails,racksandtraycomponents.Themainfunctionofthisstructureisforbearing,anumberofparkingspaces,andtheinstallationofmechanicaltransmission,electricalcontrol,firecontrolsystems,drainageandotherrelatedequipment.Framestructureisthesupportingpartofthewholegarage.Themainframesystemisbuiltbytheconnectionofhorizontalbeamandverticalcolumn’ssteelnodes.3Designofliftingandtransferringparkingcontrolmodule3.1SelectionofcontrolhardwareControlsystemisanimportantequipmentofthree-dimensionalgarage,whichdirectlyaffectstheworkingefficiencyofthegarage.Thecontrolsystemshouldhavethefeaturesofreliability,easyoperation,importandexportautomatically.Thecontrolsystemmainlyconsistsofthehost,contactor,circuitbreaker,travelswitch,limitswitch,photoelectricswitchandsoon.Besides,asanindustrialautomationcontroller,PLChashighreliability,stronganti-interferenceability,smallvolume,goodversatility,convenientuse.Therefore,thisstudyselectsS7-200CPU226PLCasthecoreofthecontrolsystemmanagesandmonitorgarage.3.2CompositionofcontrolsystemThecontrolsystemmainlyconsistsofhardwaresystemandsoftwaresystem,anditsstructureisshowninFigure2.Themaincontrolobjectofthecontrolsystemistotraverseasmallmotorandliftalargemotor.Thesemotorswilloperatethroughpressofcontrolbuttonbasedonthecustoms’purposes.Changeofthepowerphasewillachievethecarcarriers’movement.Besides,theothercontrolobjectisavarietyofauxiliarydevices,suchasdetectiondeviceanditsvarioussecurityfacilities,etc.Figure2.SystemarchitecturediagramProcessduringupanddownmotionisthemostpronetoproblems.Thereforeliftsystemwithinverterdrivestheliftingmotor.Whiledecelerationdevicewillcontroltheliftingspeed.Travelswitchpositioningistakeninordertoensurethecarcarrierdroppingatthespecifiedlocation.Thephotoelectricswitchisusedtodeterminewhetherthereisavehicleonthecarcarrier.Besides,anti-fallingsystemwithanti-fallingelectromagnetisusedinthesecondfloorparkingspacetopreventcardrop.Safetyhooksystemwillbeopenedwithpowerandlockedwithoutpower.Then,itcanpreventparkingspacedroppedbecauseofwirefractureatpower-offcondition..Detectionsignalsendingbythedetectiondeviceistoensuretheprecisepositioningoftheparkingspacesandsecurity.Requiredtestingdevicesconcludeparkingspacesleftinplace,rightinplace,ontheupperlimit,undertheplace,thesafetyhookopenandotherdetectiondevices.Thecontrolprincipleisshowninfigure3.Figure3.Principlecontroldiagram3.3DesignofcontrolprogramFigure4.SoftwareflowchartPLCcontrolsystemismainlyaimedtocompletetheoperationofstorageandtakingvehiclesautomatically.Thecontrolprogramisdesignedwithmodularstructure,whichiscomposedofinitializationprogram,maincontrolprogramandfaultalarmprogram.Initializationprogramismainlytoscantheportandthestate,thentransfertothecorrespondingprogramaccordingtotheresultsofthetests.Inaccesstovehicles,ifdriverchooseparkingspaceinlayeronethedrivercandirectlydrivethecarintotheparkingspaceoroutofthecarcarrier.Whileifdriverchoosethelayertwo,PLCcontrolprogramcandeterminetheparkingspaceinlayeronejustbelowthechosenonewhetherisfree.Thenthecarcarrierwilldropwhenitisfree.Otherwise,thecarcarrierwillbemovedandfreethespacefirstly.Oncecompletethecarstorageorcartaking,systemwillresetautomaticallyandwaitforthenextoperationinstructions.Whenthevehicleistoolongoroverweight,ortherearesomeothersecurityrisks,thefaultalarmprogramwillbesenttothesoundandlightsignalalarm,whilethesystemwillstopallactions,clearallports