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时间:2020-04-12
《分数阶非线性系统高阶P型迭代学习控制收敛性分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第37卷第2期湘潭大学自然科学学报Vol-37NO.22015年6月NaturalScienceJournalofXiangtanUniversityJun.2015ConvergenceAnalysisofHigh-OrderP--TypeIterativeLearningControlforFractionalOrderNonlinearSystemsLANYong—hong,LIHeng—bo,L儿,Xiao(InstituteofControlEngineering,XiangtanUniversity,Xiangtan4
2、11105China)[Abstract]ThispaperinvestigatestheproblemofN—‘orderP·。typeiterativelearningcontrol(ILC)schemeforaclassoffractional—ordernonlinearsystems.First,asufficientconditiontogranteetheconvergenceforthecontrolinputisobtainedbyapplyingGronwall-Bellmanlemma.Unliketheex
3、istingones,thesystemstatematrixisincludedintheconvergencecondition.Next,basedontheconceptsoftheQfactor,theconvergencespeedforthesecond-orderupdatingruleisalsocomparedwiththefirst—orderupdatinglaw.Final~ly,thesimulationresultsshowthattheproposedapproachgivesgoodtrackin
4、gperformance.Keywords:fractional—order;nonlinearsystem;iterativelearningcontrol;Gronwall-Bellmanlemma;convergencespeed分数阶非线性系统高阶P型迭代学习控制收敛性分析兰永红,李亨博,刘潇(湘潭大学控制工程研究所,湖南湘潭411105)[摘要]针对一类分数阶非线性系统,研究其N阶P型迭代学习控制(ILC)问题.首先,通过应用Gron—wall—Bellman引理,获得了系统控制输入序列收敛的充分条件.与已有结果不同的是
5、,该条件包含系统状态矩阵.然后基于Q因子概念,对二阶与一阶ILC的收敛速度进行了比较.最后,数值模拟证明了所提方法能获得满意的跟踪性能.关键词:分数阶;非线性系统;迭代学习控制;Gronwall—Bellman引理;收敛速度中图分类号:0426.3文献标识码:A文章编号:1000—5900(2015)02—0001—091IntroductionIterativelearningcontrol(ILC)[]isaneffectivestrategyforcontrolsystemtopreciselytrackagiventraj
6、ectorywhileitperformsrepetitivelyoverafinite—timeinterva1.ThefundamentalILCprofileisanoutputerror-basedfeed—forwardlearningprocess,whichmakesuseofthelatesttrackingerrortoupdateitscontrolinputSOastogenerateanupgradedcontrolinputforbetterperformanceatthenextoperation.Ov
7、erthelastdecades,aconsiderableinteresthasbeenshowninthisfield[2~.Fractionaldifferentialcalculus[]datesbacktothe17thcentury,butitwasnotappliedtophysicsandengineeringuntilrecentdecades.Itisfoundthatthedescriptionofsomedynamicsys—ternsininterdiscip1inaryfieldsiSmoreaccur
8、atewhenthefractionalderivativeiSused[.Further收稿日期:2015—01~07基金项目:国家自然科学基金项目(61104072);湖南省自然科学基金项目(14JJ2073)通信作者:兰永红(1976一),男
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