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1、尽寇庐瞰辞呛梯噻荒匹予咨蓖附录A：英文资料豕悚缗舱珀惨筮粘喽饫魁寝罅谇蘑辽缕噍吱弹靥芗眨午凝趁Thespeed-controlledinterpolatorformachiningparametriccurves声踬霸权唪嗤恫踪率铂克诞龆S.-S.Yeh,P.-L.Hsu循哭揽窥甭鄯汹徵垛馄泯碘浸Abstract:具乎怀寒咖弗母梏投币桧涤傈ModernCNCsystemsaredesignedwiththefunctionofmachiningarbitraryparametriccurvestosavemassive
2、datacommunicationbetweenCAD/CAMandCNCsystemsandimprovetheirmachiningquality.AlthoughavailableCNCinterpolatorsforparametriccurvesgenerallyachievecontouringpositionaccuracy,thespecifiedfederate,withdominatesthequalityofthemachiningprocesses,isnotguaranteedduringmo
3、tion.Recently,someapproximationresultsconcerningmotionspeedhavebeenreported[ShpitalniM,KorenY,LoCC.Computer-AidedDesign1994;26(11):832-838;BediS,AliI,QuanN.TransASMEJEngngIndustry1993;115:329-336;ChouJJ,YangDCH.Trans.ASMEJEngngIndustry1991;113:305-310;ChouJJ,Yan
4、gDCH.TransASMEJEngngIndustry1992;114:15-22].Inthispaper,byderivingacompensatoryparameter,theproposedinterpolationalgorithmhassignificantlyimprovedcurvespeedaccuracy.Inrealapplications,theproposedalgorithmresultsin:(1)constantspeed;and(2)specifiedaccelerationandd
5、ecelerationanddeceleration(ACC/DEC)tomeetthefeedratecommands.Themotionaccuracyandfeasibilityofthepresentinterpolatorhavebeenverifiedwithaprovidednon-uniformrationalB-spline(NURBS)example.©1999ElsevierScienceLtd.Allrightsreserved.锖柙豳膀绒房鹾欠餐皙嘉织霁Keywords:峦府约苌菟永赴己讥艉麝
6、毫实Parametriccurve;CNCinterpolators;Speedaccuracy;NURBS鄱叫捕啻猩源搌愿蛙泻赎凡汞1.Introduction:鬯氵顽讫镰氲龊轩跨宽歃卞鄙InmodernCAD/CAMsystems,profilesforpartslikedies,vanes,aircraftmodelsareusuallyrepresentedinparametricforms.AsconventionalCNCmachinesonlyprovidelinearandcirculararcinte
7、rpolators,theCAD/CAMsystemshavetosegmentacurveintoahugenumberofsmall,linearizedsegmentsandsendthemtoCNCsystems.Suchlinearized-segmentedcontoursprocessedontraditionalCNCsystemsareundesirableinrealapplicationsasfollows:田锶踱潋冢切种果悔棹檫遮蒜●thetransmissionerrorbetweenCAD/
8、CAMandCNCsystemsforahugenumberofdatamayeasilyoccur,i.e.lostdataandnoiseperturbation;秣笾袅庸诤蛮澍弛覃戳啪滔叛●thediscontinuityofsegmentationdeterioratessurfaceaccuracy;绢跬盎钌菅髑硎巾哕灭
