基于OPC的雙機備份技術研究及其軟件開發(fā).pdf

1、東南大學碩士學位論文基于OPC的雙機備份技術研究及其軟件開發(fā)姓名：李蓓申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：周俊20080401AbstractResearchofDualserverHotstandbyTechnologyBasedonOPCSpecificationLIBeiSupervisedbyAssociateProfessorZHOUJunSoutheastUniversityThispaperproposes

2、anewsolutiontotheproblemthathowtoimprovetheavailabilityofthetraditionalindustrialcontrolsystemTheDual—serverHotstandbyControlSystem，basedontheOPCDXspecificationinthispaper，couldbackupthehostPContheserverlayer，withoutanyc

3、hangetotheoriginalsystemThiscaneasilyreducetheswitchtime，becausethereisnodatacommunicationonthemonitorlayerInthisway，theefficiencyandusabilityofthesystemcallbefi／FtherimprovedThefirstchapterfirstsimplyreviewsthedevelopme

4、ntofthehighavailabilitytechnology，thengivestheintroductionoftheOPCtechnology，andfinallypresentstheprojectbackgroundandthemaintasksofthispaperThesecondchapteranalysestheelementsofthestructureandrealizationofthehighavailab

5、ilitysystem，andexpatiatesonthestructureofthenewsystembasedontheactualrequirementandenvironment，andthedifferencesbetweenthenewandthetraditionalTheprinciplesofthedesignationandrealizationoftheDAserverareemphasizedinthethir

6、dchapterFirstwedesignthefunctionandthestructureoftheDAserver，andthenexplainthetechnologyanddatatypesusedinthissystemBasedonallabove，threepointsagestressed：therealizationofthemultithread，thedesignationofthedatastoragememo

7、ry，softwaredesignationofthreedataaccessmethodsChapterfourilluminatesthekeysindesigningandrealizingofthisdualserverhotstandbysystembasedontheDXspecification，includingtheframeoftheaddressspaces，configurationservicesdesigna

8、ndimplementingoftheruntimemodelAndtheuserinterfacehasbeenrealizedtooThelastchaptersummarizesthispaperandprospectsthefutureofthisDualserverHotstandbysystemandinthelastworksoutthefollowingtasksKeywords：IndustrialControlSys