现场级高速以太网的可靠性技术研究

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1、电子科技大学硕士学位论文现场级高速以太网的可靠性技术研究姓名：许子辛申请学位级别：硕士专业：计算机应用技术指导教师：罗克露20040226皇i型垫查堂堡主堂垡鲨苎!堡堑堡壹垄墼奎塑盟要塞壁垫查堕窒AbstractEthernet’spotentialincompleteandseamlessinformationintegrationfromfieldcontrolleveltomanagementlevelinenterpriseisnowgraduallydevelopingdeepertow

2、ardsfieldcontrollevel，andmanagingtoamalgamatewithotherformsofcontrolnetwork．Inthisthesis，onthebasisofintroductiononthecharacteristicsandrequirementofindustrialautomationnetwork，bycomparingEthernetbasedindustrialcontrolwithtraditionalfieldbus．we。vedisc

3、ussedadvantagesanddisadVantagesrelatedtotheapplicationsofEthernetincontrolfield．Ethernethasobviousadvantagessuchasopen，cost—effctive，supportedbymanypopularhardwaresandsoftwares，butitalsohasintrinsicaldisadvantagessuchasuncertainty，non·realtime，lowreli

4、abilityandlowsecurity，whichareallthefactscontrolnetworkrequiresbaddly．We’vealsodiscussedhowtoimprovetheperformanceofEthernetbyusingsomemathmatictheoriessuchasqueueingtheory．Importingdistributedprioritycontrolintocollisiondetectioncanreduceuncertaintye

5、ffectively；RETHER，RTCCandARTCarealltheprotocolswithimprovementsonreal·time，whichmakeethernetintoreal—timeethernet；Technologyoffault-tolerantandredundancy，enhancementonperformanceonanti-interfereoftransmissionlines，firewallsallimprovethereliabilityands

6、ecurityofEthernet．BasedonARTC，thispaperpresentsthearchitectureofadvancedreal-timeethernetwithhighreliabilityandhighspeedonfieldcontrollevel．We’vedoneresearchonthetechnologyofreliabilityfromseveralways，suchassystemarchiteehture，eommmunicationprotocol，t

7、ransmissionchannals，networkcharacteristics，functionalmodulesandhardwaresettings．Thispaperpresentsanotherkindofethernetadapter—Xsignal—ethernettransmissionadapterfxETA)．Xsignalisanykindofsignalintheindustrialfield．xETAcaneasilybeusedtoconnectmanylow—sp

8、eedfieldequipmentswithethernet(especiallyARTC)，Itcanalsoreducethebudgetforupgradecontrolnetwork．BasedonrequirementsonenvironmentandreliabilityofxETA，theadapterisU电子科技大学硕士学位论文：现场级高速以太网的可靠性技术研究designedasthemostcompactonebyusinghighly-integrateda