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1、華北電力大學(xué)碩士學(xué)位論文摘要本文首先分析了網(wǎng)絡(luò)控制系統(tǒng)的基本問題和研究現(xiàn)狀,在理論上重點(diǎn)研究了RM、EDF和MEF.TOD調(diào)度算法。接著介紹了TrueTime仿真工具箱的基本結(jié)構(gòu)和功能,并搭建了網(wǎng)絡(luò)控制系統(tǒng)仿真平臺。然后對幾種經(jīng)典的調(diào)度算法進(jìn)行仿真研究,分析并比較了各種算法的優(yōu)缺點(diǎn)及適合的系統(tǒng)。最后重點(diǎn)研究了混合調(diào)度算法,針對網(wǎng)絡(luò)控制系統(tǒng)中存在非周期和隨機(jī)性緊急任務(wù)的特點(diǎn),提出了基于綜合調(diào)度指標(biāo)SSI的混合調(diào)度算法,通過網(wǎng)絡(luò)QoS調(diào)度器進(jìn)行閉環(huán)動態(tài)調(diào)度,仿真結(jié)果表明此算法對有隨機(jī)負(fù)載的網(wǎng)絡(luò)控制系統(tǒng),有效的利用了網(wǎng)絡(luò)資源,保證了很好的實(shí)時性,并提高了平均性能,有很
2、強(qiáng)的實(shí)用性。關(guān)鍵詞:網(wǎng)絡(luò)控制系統(tǒng),調(diào)度,綜合調(diào)度指標(biāo),混合調(diào)度算法ABSTRACTFirstly,theexistingbasicproblemsandresearchstatusinNCSareanalyzed,andtheRateMonotonic(RM)、EarliestDeadlineFirst(EDF)andMax/mumErrorFirst-TryOnceDiscard(MEF—TOD)schedulingalgorithmaleresearchedintheoretically.Secondly,basicstructureandfunctions
3、ofTruemIesimulationtoolboxusedintheresearchaleintroduced,then,theNCSplatformisestablishedbyusingTrueTimesimulator.Inthethirdsection,thecorrespondingsimulationwithtwoclassicschedulingalgorithmsiscarriedontheplatform.Moreover,theadvantagesanddisadvantagesandtheadaptedsystemoftheschedul
4、ingalgorithmsaredalified.Intheend,themixedschedulingalgorithmisresearchedemphatically.Aimingatthecharacteristicsofnon-periodicandrandomurgenttasksexitinginNCS,amixedschedulingalgorithmbasedonthesyntheticschedulingindex(SSI)ispresentedtoscheduledynamicallyinacloseloopbythenetworkquali
5、tyofservice(QoS)scheduler.Thesimulationshowsthatthisalgorithmmakesuseofthenetworkresourceefficientlyandhasgreatreal-timeperformancetorandomload,withhighaverageperformance,andstrongpracticality.CuiXiuzheng(ControlTheoryandControlEngineering)DirectedbyProf.HanPuKEYWORDS:NCS,scheduling,
6、syntheticschedulingindex,mixedschedulingalgorithm華北電力大學(xué)碩士學(xué)位論文摘要本文首先分析了網(wǎng)絡(luò)控制系統(tǒng)的基本問題和研究現(xiàn)狀,在理論上重點(diǎn)研究了RM、EDF和MEF.TOD調(diào)度算法。接著介紹了TrueTime仿真工具箱的基本結(jié)構(gòu)和功能,并搭建了網(wǎng)絡(luò)控制系統(tǒng)仿真平臺。然后對幾種經(jīng)典的調(diào)度算法進(jìn)行仿真研究,分析并比較了各種算法的優(yōu)缺點(diǎn)及適合的系統(tǒng)。最后重點(diǎn)研究了混合調(diào)度算法,針對網(wǎng)絡(luò)控制系統(tǒng)中存在非周期和隨機(jī)性緊急任務(wù)的特點(diǎn),提出了基于綜合調(diào)度指標(biāo)SSI的混合調(diào)度算法,通過網(wǎng)絡(luò)QoS調(diào)度器進(jìn)行閉環(huán)動態(tài)調(diào)度,仿真結(jié)果表明
7、此算法對有隨機(jī)負(fù)載的網(wǎng)絡(luò)控制系統(tǒng),有效的利用了網(wǎng)絡(luò)資源,保證了很好的實(shí)時性,并提高了平均性能,有很強(qiáng)的實(shí)用性。關(guān)鍵詞:網(wǎng)絡(luò)控制系統(tǒng),調(diào)度,綜合調(diào)度指標(biāo),混合調(diào)度算法ABSTRACTFirstly,theexistingbasicproblemsandresearchstatusinNCSareanalyzed,andtheRateMonotonic(RM)、EarliestDeadlineFirst(EDF)andMax/mumErrorFirst-TryOnceDiscard(MEF—TOD)schedulingalgorithmaleresearchedin
8、theoreticall