現(xiàn)場級硬實時網(wǎng)絡(luò)調(diào)度算法研究與實現(xiàn).pdf

1、電子科技大學(xué)碩士學(xué)位論文現(xiàn)場級硬實時網(wǎng)絡(luò)調(diào)度算法研究與實現(xiàn)姓名：葉明申請學(xué)位級別：碩士專業(yè)：計算機(jī)應(yīng)用技術(shù)指導(dǎo)教師：羅克露20041220一銎塑鏨堡塞墮基查塑塑壁篷堡翌壅童窯望——AbstractFunctionsofrealtimecomputingareverypowerful，ItiswidelyappliedtOaviation，spaceflight，nuclearpowerenergysources，industrycont

2、rol，militaryaffairscommandcontrol，artilleryautocontrolandSOon。Especiallybecauseofdevelopmentofrealtimecomputingandcomputernetworktechnology，F(xiàn)ieldbuscontrollingsystemscontinuetobeapplied8tpracticeFieldbusesarethelinkamong

3、digitalcommunicationequipmentControllingequipmentsarelinkedtogethertobecomeopendigitalandmutticastcommunicationcontrollinglocalnetworkbythewayofFieldbus，andarelinkedtobecomecontrollingsystembythewayofnetworknodeBecauseof

4、allkindsofreasons，F(xiàn)ieldbuscontrolllingequipmentsofmanyfactoriesaren’tcompatibleandtheirbandwidthisalsonarrowAtthesametime，F(xiàn)ieldbusalsoCannotmeetrequireofrealtimecommunicationtransmitssioncontrolling，Withdeeplybeingapplie

5、d，theuserbringsforwardeagerrequireswithoperatorbandwidth。transmissiondistance，faulttolerance，reliabilityandpriceofmodemindustrycontrollingsoftware。ItiswidelyappliedbecauseEthemethaveaseriesofadvantagesinnonrealtimenetwor

6、kButitCannotbeappliedteal—timenetworkbecauseEthernetadoptCSMA／CDtechnologyandexponentialincreasingmechanismButhardreal—timenetworksarerequiredtobedevelopedbecauseofsocialdevelopmentandrequirementofnationaldefenseSotheres

7、earchersworkatresearchofhardrealtimenetworktechnologybasedonbosomEthemet，Inthisthesis，theauthorbringsforwardthetheoryoffieldhardrealtimeEthernetbasedonoriginalknowledgeandtheoryEspeciallytheauthorrealizesnetworkschedulin

8、galgorithminfieldhardreal—timetheoryThcauthorroundlyanalyzesnetworkschedulingalgorithmofhardreal，timenetworkinthispaperandthinkspresentalgorithmhaveaseriesofshortcoming。Forexample，thefirstislOWutilizationofCPU。thesecondi

9、Sthatitcarlnotholdoutdynamicchangingperiodtask，thethirdisthelowefficencewhileprocessingnonperiodtask，thefourthisthatitisn’tpredictibalewhetherthetaskcomputingissuccessful，thefifthiSnotconfirmationofinstantaneousoverload。