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簡介:?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????2010INTERNATIONALSYMPOSIUMONCOMPUTER,COMMUNICATION,CONTROLANDAUTOMATION9781424455676/10/2600?2010IEEE3CA2010????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????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簡介:SIMULATIONSTUDIESOFTRAFFICMANAGEMENTSTRATEGIESFORALONGTUNNELTSAIYUNLIAOA,TAYINHUB,?,WEIMINGHOBAGRADUATEINSTITUTEOFMARKETINGANDLOGISTICS/TRANSPORTATION,NATIONALCHIAYIUNIV,NO580,SINMINRD,CHIAYICITY60054,TAIWAN,ROCBDEPARTMENTOFTRANSPORTATIONANDCOMMUNICATIONMANAGEMENTSCIENCE,NATIONALCHENGKUNGUNIVERSITY,NO1,TAHSUEHROAD,TAINAN701,TAIWAN,ROCARTICLEINFOARTICLEHISTORYRECEIVED10MARCH2009RECEIVEDINREVISEDFORM18MAY2011ACCEPTED23AUGUST2011AVAILABLEONLINE23SEPTEMBER2011KEYWORDSTHEHSUEHSHANTUNNELADVANCEDTRAFFICMANAGEMENTDYNATAIWANABSTRACTTHEHSUEHSHANTUNNEL,THEFIFTHLONGTUNNELINTHEWORLD,HASATOTALDISTANCEOF129KMAFTERTHEOPENINGOFTHETUNNEL,TRAFFICDEMANDBETWEENTAIPEIANDILANINCREASEDDRAMATICALLYHOWEVER,EFFICIENTTRAFFICMANAGEMENTSTRATEGIESFORTHEHSUEHSHANTUNNELNEEDTOBEDEVELOPEDANDEVALUATEDACCORDINGLYINORDERTOALLEVIATETRAFFICCONGESTIONDUETOHIGHDEMANDAND/ORPOSSIBLEINCIDENTSTHERESEARCHAIMSTOEVALUATEPOSSIBLETRAFFICMANAGEMENTSTRATEGIESBASEDONAVAILABLECONTROLDEVICESTHROUGHSIMULATIONASSIGNMENTTECHNIQUESPOSSIBLETRAFFICMANAGEMENTSTRATEGIES,INCLUDINGACCESSCONTROLRAMPMETERING,LANECONTROLANDROUTEGUIDANCE,AREPROPOSEDANDEXAMINEDTHROUGHNUMERICALEXPERIMENTSINORDERTOANALYZETRAFFICMANAGEMENTSTRATEGIESBASEDONSIMULATION,DYNATAIWAN,ASIMULATIONASSIGNMENTMODEL,ISDEVELOPEDTOSIMULATETRAFFICCONTROLSTRATEGIESANDREFLECTDRIVER’SRESPONSETOROUTEGUIDANCESEVERALINDEXES,INCLUDINGVEHICLEQUEUELENGTH,AVERAGEDENSITYANDAVERAGESPEED,AREUSEDINTHECOMPARISONSTHERESULTSSHOWTHATRAMPCONTROLPROVIDESTHEBESTBENEFITSCOMPAREDTOOTHERSTRATEGIESANDCANREDUCETHEAVERAGEQUEUELENGTHBYABOUT18?2011ELSEVIERLTDALLRIGHTSRESERVED1INTRODUCTIONTAIWANISAMOUNTAINOUSISLAND,ANDTUNNELSPLAYANIMPORTANTROLEINDEVELOPINGNEWFREEWAYSTHELENGTHOFTHEFREEWAYCONNECTINGTAIPEIANDILANINTHENORTHERNPARTOFTAIWANISABOUT55KM,AND25OFTHEFREEWAYISTUNNELTHEHSUEHSHANTUNNEL,THEFIFTHLONGESTTUNNELINTHEWORLD,HASATOTALDISTANCEOF129KMTHEDESIGNSPEEDIS80KM/H,ANDTHEREARETWOLANESFOREACHDIRECTIONTHETUNNELOPENEDONJUNE16,2006AFTERTHEOPENINGOFTHETUNNEL,TRAFFICDEMANDBETWEENTAIPEIANDILANINCREASEDDRAMATICALLYANDAVERAGEDAILYDEMANDHASREACHED50,000–60,000PASSENGERCARUNITSPCUTANFB,HTTP//WWWFREEWAYGOVTW/SEVERALMETHODSHAVEBEENPROPOSEDTOENSURESAFETYINROADTUNNELS,ANDTHESEMETHODSARECLASSIFIEDINTOTWOCATEGORIESMASHIMO,2002,NAMELY,REDUCTIONOFTHEPROBABILITYOFANINCIDENTANDREDUCTIONOFTHECONSEQUENCEOFEVENTSSUCHASACCIDENTSANDFIRESTHELATTERISACHIEVEDTHOUGHAHIGHLYAUTOMATEDSURVEILLANCEANDCONTROLSYSTEMHOWEVER,HOWTOUTILIZENEWTRAFFICCONTROLDEVICESFORTRAFFICMANAGEMENTISACRITICALISSUETRAFFICACCIDENTSINTUNNELSHAVEBEENEXTENSIVELYSTUDIEDMAETALINPRESSCONDUCTEDASTUDYOFTRAFFICACCIDENTSBASEDONPOLICEREPORTSFROMFOURTUNNELSANDSUMMARIZEDTEMPORALANDSPATIALDISTRIBUTIONCHARACTERISTICSOFTRAFFICACCIDENTSTHEANALYSISSHOWEDTHATMOSTOFTHEPROBLEMSARESPEEDINGANDTHEFAILURETOMAINTAINASAFEDISTANCETOTHEVEHICLEINFRONTBARIANDNASER2005PRESENTEDSIMULATIONSTUDIESOFSMOKEFROMABURNINGVEHICLEINATUNNELANDTHETIMEAVERAGEDEQUATIONSFORVELOCITY,PRESSURE,TEMPERATURE,ANDMASSFRACTIONOFEMISSIONARESOLVEDTHEIRSIMULATIONRESULTSSHOWEDTHATTHEEMISSIONSRELEASEDFROMTHEVEHICLESINTHEJAMPOSEDATHREATTOHUMANHEALTHANDQUICKEVACUATIONOFTHEPASSENGERSISESSENTIALINTHEEVENTOFAFIREINTHETUNNELUNDERINTELLIGENTTRANSPORTATIONSYSTEMSITS,TRAFFICMANAGEMENTSTRATEGIESCANBEDEVELOPEDBASEDONNEWDETECTIONTECHNOLOGIESANDTRAFFICCONTROLDEVICESREALTIMETRAFFICCONDITIONSCOULDBEOBSERVEDTHROUGHTRAFFICDATA,SUCHASFLOW,SPEED,ANDOCCUPANCY,FROMMONITORINGANDSURVEILLANCESYSTEMSTHUS,REALTIMETRAFFICOPERATIONSORTRAFFICMANAGEMENTSTRATEGIESCOULDRESPONDTOREALTIMETRAFFICCONDITIONSTOAVOIDAND/ORRELIEVETRAFFICCONGESTIONSINORDERTOAVOIDPOSSIBLELOSSANDDELAYDUETOSPECIALCHARACTERISTICS,TUNNELOPERATIONANDMANAGEMENTNEEDSTOBECAREFULLYDEVELOPEDANDPLANNEDINADVANCEINCASEOFANYPOSSIBLEINCIDENTSSINCETHEREISNOPRIOREXPERIENCEINMANAGINGLONGTUNNELSINTAIWAN,ESPECIALLYUNDERVERYHIGHDEMAND,ADVANCEDTRAFFICMANAGEMENTSTRATEGIESFORLONGTUNNELSNEEDTOBEEVALUATEDACCORDINGLYINORDERTOALLEVIATETRAFFICCONGESTIONDUETOHIGHDEMANDAND/ORPOSSIBLEINCIDENTSJHAETAL,1999BENAKIVAETAL,2001,2003MAINTRAFFICMANAGEMENTDEVICESINTHEHSUEHSHANTUNNELINCLUDEVARIABLEMESSAGESIGNSVMS,LANECONTROLSIGNALLCS,AND08867798/SEEFRONTMATTER?2011ELSEVIERLTDALLRIGHTSRESERVEDDOI101016/JTUST201108004?CORRESPONDINGAUTHOREMAILADDRESSESTYLIAOMAILNCYUEDUTWTYLIAO,TYHUMAILNCKUEDUTWTYHUTUNNELLINGANDUNDERGROUNDSPACETECHNOLOGY272012123–132CONTENTSLISTSAVAILABLEATSCIVERSESCIENCEDIRECTTUNNELLINGANDUNDERGROUNDSPACETECHNOLOGYJOURNALHOMEPAGEWWWELSEVIERCOM/LOCATE/TUSTCANBEACHIEVEDTHROUGHSIMULATIONRESULTS,INCLUDINGSYSTEMWIDEPERFORMANCEANDTRAFFICCHARACTERISTICSFORSPECIFICLINKS32DYNATAIWANDYNATAIWANWASDEVELOPEDTOSIMULATEANDPREDICTTRAFFICFLOWPATTERNSINORDERTODEVELOPAPPROPRIATEATMS/ATISSTRATEGIESFORTRAVELERINFORMATIONASWELLASREALTIMETRAFFICCONTROLHUETAL,2007THEOVERALLFRAMEWORKOFDYNATAIWANISSHOWNINFIG3ITISCOMPOSEDOFTWOLAYERS,NAMELYSIMULATIONLAYERANDREALTIMECONTROLLAYERTHESIMULATIONLAYERCONSISTSOFTWOMAJORCOMPONENTS,DEMANDANDSUPPLYTHEDEMANDCOMPONENTPROCESSESTRIPMAKER’SDECISIONSONMODE,DEPARTURETIME,ANDROUTE,THUSTIMEDEPENDENTODTRIPTABLESAREFORMEDTHESUPPLYCOMPONENTINCLUDESROADWAYGEOMETRICDATA,TRAFFICNETWORKCONFIGURATION,ANDTRAFFICCONTROLMEASURESTHUS,VEHICLESANDASSOCIATEDPATHSAREGENERATEDANDSIMULATEDINAREALISTICTRAFFICENVIRONMENTVEHICLESANDASSOCIATEDATTRIBUTESAREGENERATEDTHROUGHTHEDEMANDDATA,ANDARELOADEDINTOTHENETWORKACCORDINGTOTHESELECTEDDEPARTURETIMEANDROUTESVEHICLESAREMOVEDINDIVIDUALLYACCORDINGTOPREVAILINGLOCALSPEEDS,CONSISTENTWITHMESOSCOPICFLOWRELATIONSACROSSNETWORKWHILETHEVEHICLESAREMOVINGINTHENETWORK,TRAVELINFORMATIONISPROVIDEDTHROUGHVARIABLEMESSAGESIGNSVMSASWELLASINVEHICLEINFORMATIONSYSTEMSSUCHASRADIOINTHEREALTIMELAYER,ITISASSUMEDTHATREALTIMEDATAFROMTRAFFICSURVEILLANCESYSTEMSISOBTAINEDINTERMSOFFLOWANDSPEED,THENTHEREALTIMEDATACANBEUSEDTOESTIMATEANDPREDICTSHORTTERMORIGIN–DESTINATIONO–DPATTERNS,RESULTINGINO–DTRIPTABLESTHETIMEDEPENDENTO–DTRIPTABLESARELOADEDINTOTHESIMULATIONLAYERTHEPREDICTEDFLOWSAREOBTAINEDTHROUGHSIMULATIONACCORDINGTOTHEUPDATEDO–DTABLESANDTHERESULTINGFLOWDISTRIBUTIONSCOULDBEUTILIZEDFORADVANCEDTRAVELERINFORMATIONSYSTEMSASWELLASREALTIMETRAFFICCONTROLSYSTEMSINCASESWHERETHEREALTIMEFLOWDATAISNOTAVAILABLEBECAUSEITDOESNOTCOVERTHEWHOLENETWORK,FLOWDATAFROMTHESIMULATIONLAYERCOULDBEUSEDINITSABSENCEVEHICULARMOVEMENTSINTHETRAFFICNETWORKARESIMULATEDTHROUGHTWOPROCESSESLINKMOVEMENTANDINTERSECTIONTRANSFERPROCESSESINTHELINKMOVEMENTPROCESS,THEGREENSHIELDSMODEL,ALINEARSPEEDDENSITYRELATIONSHIP,ISASSUMEDTHETRANSFERPROCESSPERFORMSTHELINKTOLINKTRANSFEROFVEHICLESATNODESTHETRANSFERPROCESSISCONTROLLEDBYSEVERALFACTORSLINKSATURATIONFLOWRATE,POSSIBLECAPACITY,ANDPOSSIBLEGREENTIMEFORINTERRUPTEDLINKFLOW,THETRANSFERPROCESSAPPROPRIATELYALLOCATESTHERIGHTOFWAYACCORDINGTOTHEPREVAILINGCONTROLSTRATEGYATINTERSECTIONSDYNATAIWANPROVIDESTHEABILITYTOEXPLICITLYMODELANARRAYOFCONTROLELEMENTSFORBOTHSURFACESTREETSANDFREEWAYSINURBANAREAS,INCLUDINGRAMPCONTROL,MAINLINESPEEDCONTROL,VMS,ANDSIGNALCONTROLVALIDATIONSOFDYNATAIWANHAVEBEENCONDUCTEDINDIFFERENTRESEARCHPROJECTSHUETAL,2007,2008,2009ANDTHEMAINFOCUSISTOCOMPAREACTUALFLOWDISTRIBUTIONSWITHSIMULATEDFLOWDISTRIBUTIONSFROMDYNATAIWANINGENERAL,THEFLOWCOUNTSFROMVDSFOREVERY5MINARECOMPAREDWITHTHESIMULATEDFLOWCOUNTSFROMDYNATAIWANONEOFTHESTUDIESSHOWSTHATTHEAVERAGEERRORSBETWEENTHESIMULATEDFLOWSANDTHEOBSERVEDFLOWAREWITHINTHERANGEOF±40ANDLARGEERRORSAREOBSERVEDNEARTHEBOUNDARYOFSTUDYAREAS33TRAFFICMANAGEMENTSTRATEGIESBASEDONAVAILABLECONTROLDEVICESINTHEHSUEHSHANTUNNEL,TRAFFICMANAGEMENTSTRATEGIESCONSIDEREDFORTHETUNNELINCLUDEACCESSCONTROL,ROUTEGUIDANCE,LANECONTROL,ANDMIXEDSTRATEGIESTHEMIXEDSTRATEGIESREFERTOMULTIPLECONTROLSTRATEGIES,INCLUDINGACCESSCONTROL,ROUTEGUIDANCEANDLANECONTROL,WHICHAREAPPLIEDATTHESAMETIMETHESECONTROLSTRATEGIESASWELLASTHEMODELSDEVELOPEDINDYNATAIWANAREDISCUSSEDHEREAFTER1ACCESSCONTROLRAMPCONTROLISACLASSICEXAMPLEOFACCESSCONTROLANDALARGENUMBEROFRAMPCONTROLALGORITHMSRANGINGFROMLOCALCONTROLTOAREACONTROLHAVEBEENDEVELOPEDTWOMAJORSTRATEGIESAPPLIEDINTHISSTUDYARERAMPCLOSUREANDONRAMPMETERINGALINEAPAPAGEORGIOUETAL,1991,AFEEDBACKLOCALCONTROLALGORITHMFORONRAMPMETERING,ISAPPLIEDINTHISSTUDYTHEFEEDBACKALGORITHMISDESCRIBEDASFOLLOWSFIG1TRAFFICCONTROLDEVICESFORTHEHSUEHSHANTUNNELTYLIAOETAL/TUNNELLINGANDUNDERGROUNDSPACETECHNOLOGY272012123–132125下載積分: 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簡介:中文中文2954字出處出處FUHL,CHANGWCWINDTURBINECONTROLMONITORSYSTEMSIMULATIONANDVALIDATIONC//INTERNATIONALSYMPOSIUMONCOMPUTER,COMMUNICATION,CONTROLANDAUTOMATIONPROCEEDINGS201069風機監(jiān)控系統(tǒng)仿真和驗證HLFU,WCCHANG摘要在本文中,使用LABVIEW作為工具,用虛擬設備來代實物來控制系統(tǒng)和提高系統(tǒng)性能。這樣不僅節(jié)省了資金而且能夠按照人們的意愿改變任何參數(shù)配置。使用LABVIEW的人機界面特性將數(shù)據(jù)最終以圖形形式展示。本文適用于風機監(jiān)控和傳感器控制系統(tǒng),使用定位技術去轉換系統(tǒng),使之以圖形界面的形式時實顯示。在本文中,計劃利用LABVIEW軟件工具控制去建立基于MODBUS通信接口的數(shù)據(jù)采集系統(tǒng)。所以這個系統(tǒng)將實時地獲得風機的數(shù)據(jù)(風速、風向、能流、電壓和發(fā)電數(shù)據(jù)速率等等)。利用網(wǎng)絡可以在很短的時間內將數(shù)據(jù)傳輸?shù)奖O(jiān)控系統(tǒng),所以可以計算出在實際天氣情況下的風機發(fā)電效率。通過和模型數(shù)據(jù)的比較,有助于設計新的風機形式提高風機性能,同時也可以了解電能的傳輸效率。最終結果的顯示將取決于客戶的需求,在人機界面通過RS485接口傳輸后,傳輸接口足以滿足輸入數(shù)據(jù)沒有大的失真的要求,在以客戶為中心的設計中有著廣闊的空間。關鍵詞關鍵詞風機,LABVIEW,MODBUS通訊,數(shù)據(jù)采集1介紹過去幾百年間,據(jù)臺北氣象局統(tǒng)計,臺北的年平均升高溫度為131度,比聯(lián)合國氣象專家小組預測的06度高了很多。臺灣的溫室效應比其他國家更嚴重。所以綠色能源發(fā)展是非常迫切的。根據(jù)外文機構如聯(lián)合報、英國科學文獻中1976到2004年對“自然”研究雜志中,平均地表溫度升高了049度。這里展示了全球溫室效應,而溫室效應的罪魁禍首便是化石燃料的使用。根據(jù)這些數(shù)據(jù),當風機發(fā)電每生產(chǎn)提供一瓦特的電能,那將減少067KG的二氧化碳排放量,因此,綠色能源的發(fā)展和應用將成為以后的主流。通過以下表格便可以看出清潔能源可以代替常規(guī)能源,因此,如何探測客戶的可再生能源數(shù)量,并且通過網(wǎng)絡來存儲這些記錄信息的任務將轉交給能源高速公路公司,因此去了解實際的理論情況和電能生產(chǎn)量以及生產(chǎn)效率將非常重要。1,2,3表1風機發(fā)電世界范圍內的發(fā)展趨勢2002年以前世界風機發(fā)電機量61000臺,總發(fā)電量3200105KW(歐洲75,美國15)20022007年底世界風機發(fā)電總量5100105,增長11207年底世界總發(fā)電量8300105(歐洲75)(世界發(fā)電總量的1)到2012年增加2400105KW總裝機發(fā)電量177108KW(世界發(fā)電總量的2)到2020年世界發(fā)電總量的12世界風能委員會預測到2030年,風機發(fā)電將站到總發(fā)電量的29串口設置18風機電壓表V18風機電流表A18風機功率表KW/H18風機電壓表V18風機電流表A18風機功率表KW/H32電池電壓VDC風數(shù)記M/SCRCHEXNUM存為數(shù)組數(shù)據(jù)繪圖人機界面存儲并建立數(shù)據(jù)庫圖22監(jiān)控系統(tǒng)流程圖3MODBUSRTU通信管理原型31MODBUSRTU通信管理原型在遠程終端單元模式中信息是基于11位定義的,第一位是起始位,緊接著是八位的字符數(shù)據(jù)存儲,一個校正位和一個結束符,如圖所示一樣。以這種信息形式為基礎,在電腦端連接的的RS232通信接口也要用這種形式的數(shù)據(jù)。而通信中心部分的頻率將取決于設備。圖31MODBUSRTU模式數(shù)據(jù)信息MODBUSRTU模式協(xié)議,MODBUSRTU模式協(xié)議的數(shù)據(jù)結構,比如就像表格1所示那樣,也就是,地址代碼,函數(shù)代碼,數(shù)據(jù)區(qū)域和四位的CRC校驗位。在每個數(shù)據(jù)的開始和結束必須加上35個字符的時間。在他們中間,地址代碼的有效值在1到247之間;在代碼的功能區(qū)域,就像表格2所示那樣,除了表格功下載積分: 10 賞幣上傳時間:2024-03-16頁數(shù): 88人已閱讀
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