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6、==目目=l===!EE!EE=自==目自lj目E==目目自Ejl自TheResearchOnStackerProcessModelBaseOnPetriNetAbstractSinceChina’SaccessiontotheWTO，theeconomicdevelopswithhighspeed，andscienceandtechnologyalsodeveloprapi
7、dly．Butformodementerprisesparticipantsineconomicconstruction，thechallengetheyfacesisbecominggreaterandgreater．Modemlogisticsasanimportantfactortoenhancethecompetitivenessoftheirproductshasbeenpaidmoreattention．Moreover,themostimportantfactoraffectthem
8、odemlogisticsefficiencyishighlyautomatedstackerinautomaticwarehousingsystemThep岫ermainlystudiesthewarehousingentryprocessinwarehousingsystemofstacker,basedonpracticalinvestigationofwarehousingsystemforlogisticsenterpriseandtheoryknowledge．Firstly,this
9、articledescribethePetrinetandknowledgerelateddiscreteeventindetailregardingthecharacteristicofstacker,demonstratesthattheobiectsstudiedinthetextisthetypicaldiscreteeventsystemwhichCanbemadeanalyticalstudybasedontheknowledgerelatedtoPetrinetandalsocano
10、ffersbasictheoryforroodcling．Secondly,thispapercomparetheexistingnewtechnologywiththeoldwarehouseaddressrecognitionandpositioningtechnology,suggesttoreplacetraditionalphotoelectricsensorpositioningandShareaddressingmodeswithpositioningbyintegratinglas
11、erdistancesensorandrotaryencoder，thenillustrateschangesofimprovedautomaticwarehousingsystem，itprovidesthefoundationfornextestablishhardwaremodeling．Finallyinthispaper,itbuildmodelforthewarehousingentryprocessinwarehousingsystemofstackerwithabovementio
12、nedhardwarefoundationandtheoreticalbasis，simulatingthemodelbyuse'oftheExSpectsimulationsoftware，makingfurtheranalysisofthesimulationresult，demonstratethefeasibilityofthemodeultimately,furthermore，themodelestablishedwillhavepracticalsignificancefortrue
13、system．．II．哈爾濱理工大學工學碩士學位論文KeywordsAutomatedStorageandRetrievalSystem，Petrinet，Modeling，Simulation．ⅡI．哈爾濱理工大學工學碩士學位論文目錄摘要???????????????????????????????IAbstract???????????????????????????????????????．．II第1章緒論????????????????????????????．．11．1課
