基于Linux的工業(yè)控制計算機測控系統(tǒng)的運用與研究.pdf

1、分類號UDC密級學(xué)號彳屈火季碩士學(xué)位論文論文題目：基于Linux的工業(yè)控制計算機測控系統(tǒng)的運用與研究論文作者：茍劍裳親、聱蘭‰毪蓉：俞集輝教授重慶大學(xué)申請學(xué)位級別：碩士專業(yè)名稱：電工理論與新技術(shù)論文提交日期：2002年4月20日答辯日期：2002年5月21日學(xué)位授予單位：重慶大學(xué)授位日期：年月日答辯委員會主席：廖常初教授論文評閱人：廖常初教授李宣富教授2002年4月20日英文摘要AbstractTheRTOS(Real—TimeOper

2、ationSystem)holdsthebalanceinarealtimemeasuringandcontrolsystem，andsometimesitsperformancedetermineswhetherameasureandcontrolsystemCanreachtheexpectationAfewbigcompaniesintheworldfirmlydominatethekeytechniqueofaRTOSTheLi

3、nuxgaveBSahopetOchangethesituation，Underthisbackground，thisthesisexpoundsmyresearch：applyingLinuxtoanIPCmeasuringandcontrolsystemwhichiscenteredonimprovingreal—timeperformanceLinuxisdesignedforaworkstationanditsprocesssc

4、hedulemechanismisaimedtooptimizetheordinarycircumstance，SOitmustberebuilttoimprovereal—timeperformanceifitisappliedinareal一15hesystemGenerallytherearetwowayst0reachthegoalOneisthePOSIX(the”PortableOperatingSystemInterfac

5、e”)，theotheristhebottomprogrammingIntheformermethod，thePOSIX1bfunctionthathasagoodrealtimeperformanceistransplantedintotheLinuxTherearealotofdifficultiesinusingthismethodSOitsprospectisnotbrilliantInthelattermethod，aprin

6、ciplemustbecomplied：theLinuxkernelismodifiedwithoutmuchchangeandsomeessentialpartsthatleadstobadreal—timeperformanceisimprovedBythismeans，RTLinux，RTAIandKURTgetagoodreal—timeperformance，andthismeansisalsoinapplicationtom

7、yresearchInthisthesistheauthorbringsforwardanewrealtimeschemebasedonthecurrentrealtimeproductionsofLinuxInthescheme，notonlytheRTLinux’Sdoublekernelstructureanditsvirtualinterruptareadopted，whichmakethestandardLinuxproces

8、sasthelowestpriori哆oneintherealtimekernel，butalsothe8254issettoworkintheOneshotmodelbyusingtheKURT’SUTIMEpackage，whichimprovestheclockfrequencyoftheOSandreducestheCPU’SextraburdenTherealtimekernelofthenewschemeconsistsof

9、aschedulerthatisdesignedbyacustomaccordingtothescaleofaconcretesystemandthecombinationofthevirtualinterruptandtheUTIMEpackageInadditiontheauthorbringsforwarda11idea：therealtimekernelandthestandardLinuxkemeIhasitsownOSclo

10、ck；theauthorstudiesthearithmeticabouttheirfitialvaluefor8254while8254isworkingintheOne—shotmodel，whichhastheinstructivemeaninginapplicationFinally，asanexampleofLinuxapplicationandtheverificationofthenewschemeaschedulerde