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1、Auromarica,Vol.31,No.12,pp.pp.1751-1770,1995Copyright@1995ElwierScienceLtdPrintedinGreatBritain.Allrightsreservedooo5-m9w5$9.50+0.000005-1098(95)00094-lIdentificationandControl-Closed-loopIssues*PAULM.J.VANDENHOFtandRUUDJ.PSCHRAMA+*Asurveyisgivenofrecentdevelopmentsiniterati
2、vemethodsofclosed-loopidentljicationandcontroldesign,wheretheident$cationcriteriaarebasedoncontrol-relevantcostfunctions.KevWords-Systemidentification;robustcontrol;closed-loopidentification;experiment-basedcontroldesign;adaptivecontrol.Abstract-Anoverviewisgivenofsomecurren
3、tresearchac-Whilemodel-basedcontroldesignhasbeende-tivitiesonthedesignofhigh-performancecontrollersforplantsvelopedintorobustcontrol,theimportanceofwithuncertaindynamics,basedonapproximateidentificationaccuratemodeldescriptionshasbeenamplified.andmodel-basedcontroldesign.Ind
4、ealingwiththeinterplayApartfromanominalplantmodel,robustcontrol-betweensystemidentificationandrobustcontroldesign,somedesignmethodsemployadescriptionofthemodelrecentlydevelopediterativeschemesarereviewedandspecialattentionisgiventoaspectsofapproximateidentificationun-uncerta
5、inty,i.e.some(hard)upperboundonaderclosed-loopexperimentalconditions.specificmismatchbetweenplantandmodel,inor-dertobeabletoevaluaterobuststabilityand/orrobustperformanceofthecontrolledplant,seee.g.I.INTRODUCTIONFrancis(1987),Maciejowski(1989)andDoyleetTheidentificationofdyn
6、amicmodelsoutofexperi-al.(1992).Intherobustcontrol-designparadigm,mentaldatahasveryoftenbeenmotivatedandsup-asarule,oneassumesmodelanduncertaintytoportedbythepresumedabilitytousetheresultingbegivenapriori.However,oneacceptsthatthemodelsasabasisformodel-basedcontroldesign.(no
7、minal)modelsthatareusedingeneralwillnotAssuch,controldesignisconsideredanimportantbeabletocaptureallofthedynamicsthatareintended-applicationareaforidentifiedmodels.Onpresentintheplant,asexactmodellingiseithertheotherhand,model-basedcontroldesignisbuiltimpossibleortoocostly.u
8、pontheassumptionthatareliablemodeloftheInsystemidentification,emphasishaslo
