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1、英文原文EvolutionaryprogrammingofCNCmachinesAbstractThepaperproposesanewconceptforprogrammingofCNCmachines.TheconceptbasedongeneticalgorithmsassuresevolutionarygenerationandoptimizationofNCprogramsonthebasisofCADmodelsofmanufacturingenvironment.Thestructure,undergoingsimulatedevolutio
2、n,isthepopulationofNCprograms.TheNCprogramscontrolthemachinewhichperformssimpleelementarymotions.Duringtheevolutionthemachinemovementbecomesmoreandmorecomplexandintelligentsolutionsemergegraduallyasaresultoftheinteractionbetweenmachinemovementsandmanufacturingenvironment.Theexampl
3、esofevolutionaryprogrammingofCNClatheandCNCmillingmachinetoolfordifferentcomplexitiesoftheblanksandproductsarepresented.Theproposedconceptshowedahighdegreeofuniversality,efficiency,andreliabilityanditcanbealsosimplyadoptedtootherCNCmachines.©2005ElsevierB.V.Allrightsreserved.Keywo
4、rds:Manufacturingsystems;NCprogramming;CNCmachines;Geneticalgorithm.1.IntroductionSincetheCNCmachinesarealreadypresentinalmostallmanufacturingsystems,theautomaticprogrammingofCNCmachinesbecamewidespreadinthelasttwodecades[1,4,6,7].Thus,nowadaysnumerouscommercialprogrammingsolution
5、s,includingautomaticgenerationofNCprograms,areavailable.Thesolutionsdifferinreliability,ef-ficiency,flexibilityanduniversality.Sofar,ithasnotbeenpossibletotraceauniversalsolutionfortheprogrammingofNCmachines.Inthispaperweusedthegeneticalgorithms(GA)[2]basedapproachforprogrammingof
6、CNClatheandmillingmachinetool.TheproposedconceptcanbeadoptedalsotootherCNCmachinesforexamplecoordinatemeasuringmachines[5],weldingmachines,laserandplasmacuttingmachines[4],robotsandmanipulators.Theconceptimitatesthenaturalevolutionoflivingorganisms,whereinthestrugglefornaturalreso
7、urcesthesuccessfulindividualsgraduallybecomemoreandmoredominant,andadaptabletotheenvironmentinwhichtheylive,whereasthelesssuccessfulonesarepresentinthenextgenerationsrarely.IntheproposedconcepttheNCprograms,representedasweightedgraphs,undergoadaptation.Duringthesimulatedevolutionm
8、oreandmoresuccessfulorganisms(the
