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《線性不確定對(duì)象的網(wǎng)絡(luò)控制系統(tǒng)設(shè)計(jì)與分析》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要網(wǎng)絡(luò)控制系統(tǒng)(NetworkedControlSystems,NCSs)是指通過(guò)網(wǎng)絡(luò)形成的閉環(huán)控制系統(tǒng),具有系統(tǒng)連線少、可靠性高、結(jié)構(gòu)靈活、易于系統(tǒng)擴(kuò)展維護(hù)以及能夠?qū)崿F(xiàn)信息資源共享等優(yōu)點(diǎn),這些優(yōu)點(diǎn)使它被廣泛地應(yīng)用于各個(gè)行業(yè)中。然而網(wǎng)絡(luò)的引入也給控制系統(tǒng)帶來(lái)了一些新的問(wèn)題,諸如網(wǎng)絡(luò)誘導(dǎo)延時(shí)、網(wǎng)絡(luò)丟包、帶寬約束等等。論文在總結(jié)網(wǎng)絡(luò)誘導(dǎo)延時(shí)、網(wǎng)絡(luò)丟包、帶寬約束等問(wèn)題研究情況基礎(chǔ)上,針對(duì)網(wǎng)絡(luò)控制系統(tǒng)的帶寬約束問(wèn)題進(jìn)行研究。目前對(duì)網(wǎng)絡(luò)控制系統(tǒng)的研究大多是針對(duì)線性時(shí)不變對(duì)象的,而在實(shí)際的系統(tǒng)中,由于各種因素的影響,對(duì)象大都會(huì)存在一定的不確定性,因而論
2、文以線性不確定對(duì)象為網(wǎng)絡(luò)控制系統(tǒng)的被控對(duì)象進(jìn)行研究。論文針對(duì)網(wǎng)絡(luò)控制系統(tǒng)的帶寬約束問(wèn)題,采用具有通信邏輯的控制結(jié)構(gòu),對(duì)線性不確定對(duì)象的網(wǎng)絡(luò)控制系統(tǒng)進(jìn)行設(shè)計(jì)與分析。首先以線性定常不確定對(duì)象為被控對(duì)象,設(shè)計(jì)了具有周期通信邏輯和隨機(jī)通信邏輯的網(wǎng)絡(luò)控制系統(tǒng)結(jié)構(gòu),建立了具有通信邏輯的線性定常不確定對(duì)象網(wǎng)絡(luò)控制系統(tǒng)的數(shù)學(xué)模型,用現(xiàn)代控制理論、矩陣攝動(dòng)理論和隨機(jī)過(guò)程原理分析了系統(tǒng)的穩(wěn)定性;然后對(duì)線性時(shí)變不確定對(duì)象,設(shè)計(jì)了具有周期通信邏輯和隨機(jī)通信邏輯的網(wǎng)絡(luò)控制系統(tǒng)結(jié)構(gòu),為了克服時(shí)變不確定性對(duì)控制系統(tǒng)性能的影響,采用了同步估計(jì)模型狀態(tài)反饋控制和脈沖控制相結(jié)合
3、的控制方式,而后利用脈沖系統(tǒng)的比較原理證明了系統(tǒng)的穩(wěn)定性;最后利用Matlab/Simulink仿真工具分別設(shè)計(jì)了具有周期通信邏輯和隨機(jī)通信邏輯的線性不確定對(duì)象的仿真系統(tǒng),選擇仿真算例進(jìn)行仿真,對(duì)仿真結(jié)果進(jìn)行分析總結(jié),比較了周期通信邏輯和隨機(jī)通信邏輯對(duì)系統(tǒng)的影響,仿真結(jié)果驗(yàn)證了論文的結(jié)論。關(guān)鍵詞:網(wǎng)絡(luò)控制系統(tǒng)線性不確定對(duì)象通信邏輯脈沖控制系統(tǒng)ABSTRACTFeedbackcontrolsystems,inwhichcontrolloopisclosedthroughareal-timenetwork,arecallednetworkedco
4、ntrolsystems(NCSs).Duetolesswires,highreliability,increasedsystemagility,goodflexibilityandshareofinformationresources,NCSsarewidelyusedineveryareaoflife.However,NCSsalsointroducemanynewproblems,suchasnetwork-induceddelay,packetdropouts,bandwidthconstraintsandSOon.Therefore
5、,aftersummarizingtheresearchesaboutaboveproblems,thispaperfocusesontheBandwidthconstraints.ItisknownthatmuchattentionaboutNCSsispaidtolineartimeinvariantplants,whicharenotinaccord謝也realitybecauseoftheinfluenceofmanyfactors,SONCSsforlinearuncertainplantsarestudiesinthispaper
6、.CommunicationlogicisusedtOsolvetheproblemofbandwidthconstraintsinNCSs.Firstly,NCSstructureswithperiodicandstochasticcommunicationlogicforlinearconstantuncertainplantsaredesignedandmodeled,thenthestabilityofthesystemsisanalyzedwithmodemcontroltheory,matrixtheoryandstochasti
7、ctheory.Secondly,NCSstructuresforlineartimevaryinguncertainplantsaredesigned.Inordertoovercometheeffectoftimevaryinguncertaintyonthesystemperformance,thesynchronousestimatedmodelstatefeedbackcontrolcombinedwithimpulsecontrolisusedtoNCSsforlineartimevaryinguncertainplants.Th
8、enthestabilityofthesystemisanalyzedwithimpulsetheory.Finally,thesimulationsofNCSsf