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1、控制與檢測·組合機(jī)床與自動化加工技術(shù)文章編號:1001—2265(2009)05—0056—05基于線性白抗擾控制器的異步電機(jī)調(diào)速系統(tǒng)劉麗英,許鎮(zhèn)琳,梅強(qiáng)(1.天津大學(xué)電氣與自動化工程學(xué)院,天津300072;2.天津工程師范學(xué)院自動化與電氣工程學(xué)院。天津300222)摘要:針對異步電機(jī)難以建立精確的數(shù)學(xué)模型和矢量控制系統(tǒng)參數(shù)魯棒性差的問題,提出了用線性自抗擾控制器控制異步電機(jī)調(diào)速系統(tǒng)。線性自抗擾控制器不需要電機(jī)的精確數(shù)學(xué)模型,通過線性擴(kuò)張狀態(tài)觀測器估計出電機(jī)模型中的耦合項(xiàng)及參數(shù)攝動等引起的總擾動并加以
2、補(bǔ)償,能夠?qū)崿F(xiàn)磁鏈和轉(zhuǎn)矩的完全解耦,從而提高系統(tǒng)性能。為了驗(yàn)證上述方案,對空載起動,突加負(fù)載,給定轉(zhuǎn)速變化、轉(zhuǎn)子電阻變化、轉(zhuǎn)動慣量變化等情況進(jìn)行了仿真,并與自抗擾控制器控制的異步電機(jī)調(diào)速系統(tǒng)進(jìn)行了比較。仿真結(jié)果表明線性自抗擾控制器和自抗擾控制器一樣,無超調(diào)、響應(yīng)速度快、動態(tài)速降小、靜態(tài)無誤差,且對負(fù)載擾動、電機(jī)參數(shù)變化等具有很強(qiáng)的魯棒性,但線性自抗擾控制器需要整定的參數(shù)大大減少了關(guān)鍵詞:異步電機(jī);線性自抗擾控制器;參數(shù)整定;魯棒性中圖分類號:TM301.2文獻(xiàn)標(biāo)識碼:ATheInductionMoto
3、rDriveSystemBasedonLinearActiveDisturbanceRejectionControllerLIULi—ying,XUZhen—lin,MEIQiang(1.SchoolofElectricalandAutomationEngineering,TianjinUniversity,Tianjin300072;2.SchoolofAuto-maticandElectricalEngineering,TianjinUniversityofTechnologyandEducati
4、on,Tianjin300222,China)Abstract:Itisdificulttodevelopanaccuratemathematicalmodelfortheinductionmotorandtherobustnessofvectorcontrolsystemispoor.Thispaperfirstlyusesthelinearactivedisturbancerejectioncontroller(LADRC)ininductormotordrivesystem.Thecontrol
5、lerisnotoverlydependentontheaccuratemathematicalmodelofmotor,SOthesystemisinherentlyrobust,anditcanestimateandcompensatethegeneraldisturbancethatincludestheunknownintemaldynamicsandtheextemaldisturbance,SOtherotorfluxdecoupleswithtorquecompletely.Asares
6、ult,theperformancesareimproved.Toprovetheabovestrategy,theproposedcontrolsystemhasbeensimulatedundernoloadstart,externaltorquedisturbance,setpointchange,largeiner‘tiaandrotorresistancevariationsinMATLAB/SIMULINK,atthesametime,thecomparisoniSmadewithac—t
7、ivedisturbancerejectionc0ntroller(ADRC).SimulationresultsshowthatLADRChasthesimilarperformancewithADRCthatistheynotonlyquickenthespeedresponseofsystemwithoutovershoot,reducethedynamicspeeddropandeliminatetheerrorofthesteadystate,butalsoarerobusttotheloa
8、dmutationandparametervariationsofmotor.FurthermoreparametersregulationofLADRCismuchmoresimplethanADRC.Keywords:inductionmotor;linearactivedisturbancerejectioncontroller;parameterregulation;robustness其缺陷的基礎(chǔ)上提出的一種新型控制器,它不依賴于0引言被控對象