數(shù)控機床運動及加工過程中的非線性控制問題研究.pdf

1、華中科技大學(xué)博士學(xué)位論文數(shù)控機床運動及加工過程中的非線性控制問題研究姓名：李曦申請學(xué)位級別：博士專業(yè)：機械電子工程指導(dǎo)教師：周云飛周濟2002.3.29華中科技大學(xué)博士學(xué)位論文ItisthepermanentaimfornumericalcontrolsystemtobegainedthehighaccuracyandhighproductivityItisalsotheelementsandcommonnesstechniquefor

2、NCprocessItisveryeffectiveforhighaccuracyandhighproductivityprocessthattheadvancecontroUingmethodsareadoptedNowadays，mostofcontrollingmethodsthatusedinNCprocesssystemsarethePIDcontrollertlatbasedonthe1inearmodelsoftheobj

3、ectsHoweverallreallysystemsarethenonlinearSo，studyingthenonlinearcontrolproblemsinNCmachinetoolswillbewithprofoundsignificanceThemajorcontr／but／onsofthisthesisaredividedtwopartsFirst，itgivesthedeepstudyonthereiterationmo

4、tionprecisioncontr01forNCservoaxisSeconditdealswitlltheintelligentadaptivecontrolandtherelationaltechnologyinmillingprocessItalsoputsforwardthetheorymethodOilthoseproblemsandthenecessaryexperimentationsarecarriedoutOnthe

5、motioncontrol，thedominatingnonlinearfactorsareuncertaintiesandexogenousdisturbancesGivestwoiterativelearningcontrolalgorithm，whichforthereiterationmotionprecisiontraiectorycontrolofthose，theinvertibledynamicssystemasthet

6、heoryfoundationofflgthermoreresearchOneisthemodelbasedmethodandanotherismodel—freeTw0controllerdesigningmethodsareindependentlypurposedinthisthesisfirsttimethroughthestudyonH。controltheoryThedisadvantageousinfectionofunc

7、ertaintiesthatwidelyexistedinnormalcontrolledsystemorperiodicaldisturbancesthatregularlyappearedinreciprocatingmotioncaIlbeattenuatedorweakenbythesemethodsrespectively0nthebasisoftheaboveresearchtask，anexperimentalsystem

8、hasbeendesignedanddevelopedContrastwithtraditionalPIDcontrollerbyexperimentstudy，itnotonlyproofsthevalidityofabovementionedtheorydesign，butalsoacqukesgratifyingeffectOnthedynamicmanufacturingprocessbecauseitisd_ifficultt