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1、LinearActiveDisturbanceRejectionDecouplingControlofCirculatingFluidizedBedBoiler’CombustionSystem123YUANGuili,GANMi,LANZhongfu1,2,3.SchoolofControlandComputerEngineering,NorthChinaElectricPowerUniversity,Beijing,102206E-mail:xiaolaoda_1989@126.comABSTRACT:Thecircul
2、atingfluidizedbedboiler’combustionsystem,isamultivariablesystem,characterizedbylargetimelag,longtime-delayandstrongcoupling,thusmanycontrolmethodscan’tachieveeffectivecontrol.Inthispaper,anovelschemeforthecirculatingfluidizedbedboiler’combustionsystemwaspresentedba
3、sedontheprincipleoflinearactivedisturbancerejectioncontrol(LADRC)anddynamicdecouplingcompensator.Adecouplingcompensatorbasedonthecirculatingfluidizedbedwasdesigned,whichcouldcapturetheessentialdynamicsandcross-coupling,thenthemodelofdecouplingcompensatorissimplifie
4、daccordingtotheinvarianceprinciple,finallytheLADRCsweredesignedseparatelytofurtherreducethecouplingbytakingitasdisturbance.SinceLADRCestimatedreal-timedisturbanceviaextendedstateobserver(ESO),itcaneliminatedisturbancequicklyviaadisturbancecompensatorindependentofth
5、eaccuratemathematicalmodeloftheplant.Themethodwasappliedtoacirculatingfluidizedbedboiler’combustionsystemandtheresultsshowthatitcanprovidebetterdecoupling,strongerrobustabilityanddisturbancerejectionthanPID.KEYWORDS:CirculatingFluidizedBedBoiler;ActiveDisturbanceRe
6、jectionControl;Multi-variableDecouplingControl;1.Introductionmoretuningparameterslimittheirapplicationgenerally.Thecirculatingfluidizedbed(CFB)boiler’Linearactivedisturbancerejectioncontrol(LADRC)combustionsystemisanonlinearmulti-inputand[3,4]treatsunknownuncertain
7、tiesandexternalmulti-output(MIMO)systemwithlongtime-delay,largedisturbancesasthetotaldisturbancetoestimateandrejecttimelagandstrongcoupling.Thestrongcross-couplinginrealtime.Inaddition,LADRC,whichrequiresveryamongvariablesmadethedesigntechnologieslittleinformationo
8、ftheplantdynamics,isveryeasytofundamentallydifferentfromgeneralMIMOsystems,tuneafterreducingtheparameters[5].Atthesametime,thusmanymultiplevariab
