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时间:2020-03-24
《基于CMAC网络的滑模位置控制研究.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、机床与液压Dec.2014HydromechatronicsEngineeringV01.42No.24DOI:10.3969/j.issn.1001—3881.2014.24.014ResearchofneuronslidingmodepositioncontrolbasedonCMAC冰Xiao—juanSHIInstituteofMechanicalEngineering,Xi’anUniversityofScienceandTechnology,Xi’an710054,ChinaAbstract:Aimingatuncertainparametersa
2、ndexternaJdisturbanceofNumericaIControI(NC)MachiningToolpositionservosystem,thispaperproposedakindofneuronslidingmodecontrolalgorithmbasedonCMAC(cerebellamodeIarticulationcontro1)bycombingCMACnetworkwithslidingmodecontro1.Thesimulationresultsshowthecontrolmethodefectivelyreducesthec
3、hat.teringphenomenonintheconventionalslidemodevariablestructurecontro1.1talsoshowsthepositionservosystemhasbetterdynamicperformance,staticperformanceandstrongrobust·hess.ItcanrealizerapidandexactpositionsefvocontroI.Keywords:NCmachinetool,Positionservosystem,CMAC,Slidingmodecontrol,
4、Chatteringandadaptability[3_4].Butitsdominantshortcoming1.Introductionischatteringproblem.Thechatteringconfinesitsfar—therapplicationanddevelopment.ManyimprovedTheperformanceofpositionservosystemforNCmethodhasbeenproposedinavailableliteratures,machinetooldirectlyaffectsthemachininga
5、ccuracybuttheeffectisstillunsatisfactory.Themainmeth—ofmachinetool,whiletheperformanceofpositionodshaveboundarylayermethod,reachinglawmeth—servosystemiscloselyrelatedtoitscontrolstrategy.od,high—gaincontinuousmethod,controlmethodThepositionselwosystemofNCmachinetoolisonebasedonstate
6、andsoon[5-7].nonlineartimevaryingsystemcontainingnumerousCerebellamodelarticulationcontroller(CMAC)uncertainty.Thestructureorparameterofitsmathe.isakindofformquerytypeadaptationneuralnet—maticsmodelisnotveryaccurate.Theuncertaintywork,itcanexpresscomplicatednonlinearfunction.causing
7、byparametervariationandexternaldisturb—CMACisdifferentfromBPnetwork.Itpossesseslo—anceisatroublesomeproblemforpositionservosys-calapproximationcapabilities,continuousinputout—tem.Whenthiskindofuncertaintyhasmoreseriousputcapabilitiesandcertaingeneralizationcapabili—influenceontheser
8、vosystem,thetraditi
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