IMPLEMENTLAITNIEOANROMFOTHIOGRHDBRAINVEDSWIODFTMHILCLOINNTGRMOALCFHOIRNERSOTARYAND YAZIOELIASTOHME OAFDTIHSESOUEFNRITTAVHTEEIRORSNEIDTQPOYURCIEOTRSFOEEFRMNLETOONEFRTDIPSDTHAOFIOLTIRONHSTEPOHAGPRERHTDYAIEADLCURAFEUTELEFOSIFCLHLOMEONLT UNIVERSITYOFFLORIDA ACKNOWLEDGMENTS ihepaai[Sexyperaress.sm[ylikgenulioreuxdperelsosDrm.yJiarippTrIeucsitaylifoonrhtioxDgru.iJdoahncneZ,ie^gueprpl,o^Dra.nJdophonijSccnhcucelolveer.r Dr.PaulMason,Dr.JacobHammerandDrGregSawyerforservingonmysupervisory oommiiiee.IalsoihonkallofthemembersofIheMachineToolResearchComerforihcir assistanceandfriendship.Iextendspeciallhank.sloAndrewSmithforhishelpInediting thismanuscripL TABLEOFCONTENTS ACKNOWLEDGMENTS ABSTRACT CHAPTERS 1IHiNgThRSOpDeeUdCMTuIeOhNining. TesiBedi 1LITERATUREREVIEW ContFPreIoelDdTCfhooenrotwrrayor.ldl.eTrechni(jiie% PHo-lIenfPilmalcyeCmoennttrCoolntrol ....... OtherControlTheories 3DESIGNFORLINEARMOTION.... TUNINGROTARYMOTORDRIVESFORWIDEBANDWIDTH.. 65ADHSATilnpIUgiapiGdNllLLtiyHIyaenesligaNiaBndFsGdMgsiAwoohcaLNfredrrISeDeLeliwwNeWinTaEdiDMhIdiAroesnDiRodgcvTrareMMylHeoMwOIdoUdFTedeSeeOmeIildRNfiGDcDraRSiivLiIeoIVsnDEISN-FGOMR—OWDIEDECOBNATNRDOWLIDTH 33345563595773 7EFaEieErrDiaFlODRisWiuArRtrDanFceIsLiTnELRiSi'v'.iii.. 7816 FFFSeeeueeemdddmfffaooorrrrwwwyaaarrrdddoFoinnllLLeiernaAednasarclMryesoiwtsoDrriDvreisves 8CONCLUSIONS 97 APPENDICES AMACHINEPARAMETERS BDIGITALFILTERINGTECHNIQUES. REFERENCES BIOGRAPHICALSKETCH IMPLEMENTLAITNIEOANR baiidwidthto100>U;(hu&theballscrowwasobietoreachamaximumaccoleraiionof 2g.Thecomplexityindesigningdigitalrillers.theirlongcalculationtimeandtheirlack ofrobustnessmakethemundesirableinamachinetoolcontroller.Therefore,asliding modecontrollerwasimplementedasasubstituteforthePDcontrollerwithdigitalfilters toacquireahighbandwidth.ITusrobustcontrollerpermittedabandwidthof65Hzto achieveAanlioncecacrlmcomttoirondroifveIgu.nderPDcontrolwasfoundtohavea70Hzbandwidth.No additionalfilleniwererequitedtoachievethisbandwidth.Amajordrawbackofthis driveisitssensitivitytochangesofmassandtoexteraaldisturbanceslikecuttingfoires andfriction. Feedforwardfilterswereappliedonbothdrivestodecreasetrackingerroniduring highaccelenitionmoves.Thesefeedforwardfillersnrducedthetrackingerrortofour countsontheballscrewdriveandtotwocountsonthelinearmotordrive. INCTHRAOPDTUECRTI1ON High'.speedmachiningevolvedindiepaaldecadeaaanimprovementlo convcnilonaJmachining.Advancementsinmicroprocessorsanddigitalsignalprocessors (DSPs)madeitpossibleforthecomputernumericalcontrol(CNC)toaccuratelycontrol feeddrivesathighspeeds.Theprocessorevolutioncoupledwithahighdemandon deliveringmachinedpansatlowercostandmTasterlimespromptedthemachinetool industry10producemachiningcentersdedicatedonlylohigh-speedmachining. Furthermore,high-speedmachiningmadeitpossibletoreplaceothertraditional manufxluringprocesses.Forcaampichigh-speedmachiningofaluminummadeit possibletoproducemonolithicpanstoreplacepartsrobricaiedfromseveralcomponents. AmachinedpartconbemoreaccurateandstructurallysiirfcTthanarivetedpan.From Zelinski[i].thespeedbralteofanF-15nghterjel,madebyBoeingAerospace,cannow bweidmeacphainnweadsfmraomdeonferopmiescheeeotfmseoilaildtaalupmriocneusms.thTartaldaikteisontahlrleyetmhoen1t1hsfotoolalsosnge.mb3lefoaoltlthe 500componentsfororebrake.Thewholepancannowbemachinedin3Uhoursona high-speedmachine.Thelimeandcostofthepanisuemendousiyreduced,butmore imponandy,thequalityofthepanIsimproved. Anotherexompieisthehigh-speedmachiningofhiirdsteeldies.High-speed machiningofdiesdiminalessomeofthestepsfromtheimdiiionalmanufacturingprocess fordies.High-speedmachiningmakesitpossibleforthedieslobemachinedbytaking smallerlocistepsIhusimprovingsurfacefinishanddirainaiinggrindingandhand polishing. Severalaspectsmakeamachiningceniersuilahleforhighspeedmachining: maximumspindlespeed,maximumfeeddrivespeed,lookaheadandhighdole iransmiasionrales.LookaheadisaCNCfeaiurcthatanalyzesihecommandsbeforehand 10determineifthemachineiscapableofhandlingthecommandedmoves.Smith[2] providedamoredeiailcdde.scriplionofhigh-speedmachinedesign. AlthoughallofIheaboveaspecisarenecessaryforahigh-speedmachine,this workconcenlraiesonihefeeddrive.Spocincnlly,ihedifieremlypesoffeeddrivesthat aresuitableforthesemachinesandthecontrolmethodsihniareimplementedtomake themperformcoordinatedmovesathighspeeds. Feeddrivesonhigh-speedmachiningcenterscanexceedspeedsuf0.5m/s.hut thatalonedoesnotmakethemtrulyhighspeed.Highaccelerationisrequiredinorderto attainthemaximumvelocitywithinthecommandedmove.Ahigh-speedfeeddrivemust havehighucccicraiionandhighvelocity. HighSpeedMacltining MostmachinedoircrahcomponentslikethoseinFigure1-1havesmallpocketsto reducelheirmasswithoutdiminishingtheirstrength.ThesepocketsrequirethatIhefeed drivesofihemachinesreach(herequiredspeedasfastaspossibleinordertoproducecost effectivepans.Feeddrivesoneonvemionalmachinescanlypicallyaccelerateupto0.3g whichisusuallynotsufllcienTForhigh-speedmachiningofpockets.Higheracceleration isrequiiedtolakefulladvantageofthefeeddrivesovershortdistances.Anexampleof Iheneedforhi^craccelerationisdieapproximationoFahelicopterrotorgripin Figurel*t.ExampleofchinaJuminumpans Fhcioignguvhre-ensipIie-oe2nd.amiIalmcyha/icsnaheim.noedTcehoefmrmmoaaminnAdlpeod7c0ka7e5fie-eiTnd6riaahtcnedpoafwna2s5w.am4samc6/h3miinmenmdauibsUyi.n21g1ga4ocmvoemnr.vtehnIelni1Co1na4aslemaAmndihac t4arc5acvemellse.raatIttictnoognoskatnatdnhtededscrpeielveeedr2abt2eif0nogmresthiettosdtaracircvtece.idcrIiantsuCidaetscoeetlheBeratcthioeomnhm.iagMnh-odsseptdeeosdfpemtehadec;hmtiohnveeenwiwtaatssrasvpeelnetdfor cmTwoihatmeshmitaiomtunuadlomtemhdsoeprvtehefeeedwastiaounsrm2eep2septmroofssooikrtaimn5oed3ndtmariinnandv2ue9tvleee1ldsomcatstiottbywhehebimumltaeucasihti2irlnogoeouadkmcc4osen8pl5eearemacdtsoifnooivnren.nc2ta4Tis7hoenemAas.dlrbmiTevahfecoehrrieeenna.tcesihlraeoendwpidniatgsn. lookonly12minuteslobehigh-speedmachined.Intheamountoflimeittooktoproduce onepanontheconventionalmachine,fivepanscouldbeproducedonthehigh-speed machine. Insummary,Ilisimportanttoincreasetheaveragevelocityinordertoreducepart productionlime.Thegoalistoachievethehipestacceleraiionpossible. AccelerationandBandwidth dynamicAsc.ceMleortaotrisonhaivselilmiimtietdedbypetawkoafcaccetloerrsa:ttihornusstdecfaipnaecdilbyyoifhtehmeadrxiivemuamndcumrarcehniintehat canbeappliedacrossthewindingsatagiventime.Ingeneral,thisisnonhelimiting fparcetvoer.niAtchceelmearcahtiinoenifsruosmuarlelaychliinmgitheidgbhyacmcaeclherianteiodnysn.amTihces.reaVsiobnraitsitohnastivnitbhreatdiroinvselirail theoverallposicionaibandwidthofthesystem.Thebandwidthofthesystemisan indicationofhowthesystemrespondsloimnsienisinIhelimedomain.

Implementation of high bandwidth control for rotary and linear motor drives of milling machines PDF

116 Pages

2001

1.1 MB

English

by Tohme, Yazid Elias, 1973-

#americana #univ_florida_smathers #UFRDS

Checking for file health...

Preview Implementation of high bandwidth control for rotary and linear motor drives of milling machines

IMPLEMENTLAITNIEOANROMFOTHIOGRHDBRAINVEDSWIODFTMHILCLOINNTGRMOALCFHOIRNERSOTARYAND YAZIOELIASTOHME OAFDTIHSESOUEFNRITTAVHTEEIRORSNEIDTQPOYURCIEOTRSFOEEFRMNLETOONEFRTDIPSDTHAOFIOLTIRONHSTEPOHAGPRERHTDYAIEADLCURAFEUTELEFOSIFCLHLOMEONLT UNIVERSITYOFFLORIDA ACKNOWLEDGMENTS ihepaai[Sexyperaress.sm[ylikgenulioreuxdperelsosDrm.yJiarippTrIeucsitaylifoonrhtioxDgru.iJdoahncneZ,ie^gueprpl,o^Dra.nJdophonijSccnhcucelolveer.r Dr.PaulMason,Dr.JacobHammerandDrGregSawyerforservingonmysupervisory oommiiiee.IalsoihonkallofthemembersofIheMachineToolResearchComerforihcir assistanceandfriendship.Iextendspeciallhank.sloAndrewSmithforhishelpInediting thismanuscripL TABLEOFCONTENTS ACKNOWLEDGMENTS ABSTRACT CHAPTERS 1IHiNgThRSOpDeeUdCMTuIeOhNining. TesiBedi 1LITERATUREREVIEW ContFPreIoelDdTCfhooenrotwrrayor.ldl.eTrechni(jiie% PHo-lIenfPilmalcyeCmoennttrCoolntrol ....... OtherControlTheories 3DESIGNFORLINEARMOTION.... TUNINGROTARYMOTORDRIVESFORWIDEBANDWIDTH.. 65ADHSATilnpIUgiapiGdNllLLtiyHIyaenesligaNiaBndFsGdMgsiAwoohcaLNfredrrISeDeLeliwwNeWinTaEdiDMhIdiAroesnDiRodgcvTrareMMylHeoMwOIdoUdFTedeSeeOmeIildRNfiGDcDraRSiivLiIeoIVsnDEISN-FGOMR—OWDIEDECOBNATNRDOWLIDTH 33345563595773 7EFaEieErrDiaFlODRisWiuArRtrDanFceIsLiTnELRiSi'v'.iii.. 7816 FFFSeeeueeemdddmfffaooorrrrwwwyaaarrrdddoFoinnllLLeiernaAednasarclMryesoiwtsoDrriDvreisves 8CONCLUSIONS 97 APPENDICES AMACHINEPARAMETERS BDIGITALFILTERINGTECHNIQUES. REFERENCES BIOGRAPHICALSKETCH IMPLEMENTLAITNIEOANR baiidwidthto100>U;(hu&theballscrowwasobietoreachamaximumaccoleraiionof 2g.Thecomplexityindesigningdigitalrillers.theirlongcalculationtimeandtheirlack ofrobustnessmakethemundesirableinamachinetoolcontroller.Therefore,asliding modecontrollerwasimplementedasasubstituteforthePDcontrollerwithdigitalfilters toacquireahighbandwidth.ITusrobustcontrollerpermittedabandwidthof65Hzto achieveAanlioncecacrlmcomttoirondroifveIgu.nderPDcontrolwasfoundtohavea70Hzbandwidth.No additionalfilleniwererequitedtoachievethisbandwidth.Amajordrawbackofthis driveisitssensitivitytochangesofmassandtoexteraaldisturbanceslikecuttingfoires andfriction. Feedforwardfilterswereappliedonbothdrivestodecreasetrackingerroniduring highaccelenitionmoves.Thesefeedforwardfillersnrducedthetrackingerrortofour countsontheballscrewdriveandtotwocountsonthelinearmotordrive. INCTHRAOPDTUECRTI1ON High'.speedmachiningevolvedindiepaaldecadeaaanimprovementlo convcnilonaJmachining.Advancementsinmicroprocessorsanddigitalsignalprocessors (DSPs)madeitpossibleforthecomputernumericalcontrol(CNC)toaccuratelycontrol feeddrivesathighspeeds.Theprocessorevolutioncoupledwithahighdemandon deliveringmachinedpansatlowercostandmTasterlimespromptedthemachinetool industry10producemachiningcentersdedicatedonlylohigh-speedmachining. Furthermore,high-speedmachiningmadeitpossibletoreplaceothertraditional manufxluringprocesses.Forcaampichigh-speedmachiningofaluminummadeit possibletoproducemonolithicpanstoreplacepartsrobricaiedfromseveralcomponents. AmachinedpartconbemoreaccurateandstructurallysiirfcTthanarivetedpan.From Zelinski[i].thespeedbralteofanF-15nghterjel,madebyBoeingAerospace,cannow bweidmeacphainnweadsfmraomdeonferopmiescheeeotfmseoilaildtaalupmriocneusms.thTartaldaikteisontahlrleyetmhoen1t1hsfotoolalsosnge.mb3lefoaoltlthe 500componentsfororebrake.Thewholepancannowbemachinedin3Uhoursona high-speedmachine.Thelimeandcostofthepanisuemendousiyreduced,butmore imponandy,thequalityofthepanIsimproved. Anotherexompieisthehigh-speedmachiningofhiirdsteeldies.High-speed machiningofdiesdiminalessomeofthestepsfromtheimdiiionalmanufacturingprocess fordies.High-speedmachiningmakesitpossibleforthedieslobemachinedbytaking smallerlocistepsIhusimprovingsurfacefinishanddirainaiinggrindingandhand polishing. Severalaspectsmakeamachiningceniersuilahleforhighspeedmachining: maximumspindlespeed,maximumfeeddrivespeed,lookaheadandhighdole iransmiasionrales.LookaheadisaCNCfeaiurcthatanalyzesihecommandsbeforehand 10determineifthemachineiscapableofhandlingthecommandedmoves.Smith[2] providedamoredeiailcdde.scriplionofhigh-speedmachinedesign. AlthoughallofIheaboveaspecisarenecessaryforahigh-speedmachine,this workconcenlraiesonihefeeddrive.Spocincnlly,ihedifieremlypesoffeeddrivesthat aresuitableforthesemachinesandthecontrolmethodsihniareimplementedtomake themperformcoordinatedmovesathighspeeds. Feeddrivesonhigh-speedmachiningcenterscanexceedspeedsuf0.5m/s.hut thatalonedoesnotmakethemtrulyhighspeed.Highaccelerationisrequiredinorderto attainthemaximumvelocitywithinthecommandedmove.Ahigh-speedfeeddrivemust havehighucccicraiionandhighvelocity. HighSpeedMacltining MostmachinedoircrahcomponentslikethoseinFigure1-1havesmallpocketsto reducelheirmasswithoutdiminishingtheirstrength.ThesepocketsrequirethatIhefeed drivesofihemachinesreach(herequiredspeedasfastaspossibleinordertoproducecost effectivepans.Feeddrivesoneonvemionalmachinescanlypicallyaccelerateupto0.3g whichisusuallynotsufllcienTForhigh-speedmachiningofpockets.Higheracceleration isrequiiedtolakefulladvantageofthefeeddrivesovershortdistances.Anexampleof Iheneedforhi^craccelerationisdieapproximationoFahelicopterrotorgripin Figurel*t.ExampleofchinaJuminumpans Fhcioignguvhre-ensipIie-oe2nd.amiIalmcyha/icsnaheim.noedTcehoefmrmmoaaminnAdlpeod7c0ka7e5fie-eiTnd6riaahtcnedpoafwna2s5w.am4samc6/h3miinmenmdauibsUyi.n21g1ga4ocmvoemnr.vtehnIelni1Co1na4aslemaAmndihac t4arc5acvemellse.raatIttictnoognoskatnatdnhtededscrpeielveeedr2abt2eif0nogmresthiettosdtaracircvtece.idcrIiantsuCidaetscoeetlheBeratcthioeomnhm.iagMnh-odsseptdeeosdfpemtehadec;hmtiohnveeenwiwtaatssrasvpeelnetdfor cmTwoihatmeshmitaiomtunuadlomtemhdsoeprvtehefeeedwastiaounsrm2eep2septmroofssooikrtaimn5oed3ndtmariinnandv2ue9tvleee1ldsomcatstiottbywhehebimumltaeucasihti2irlnogoeouadkmcc4osen8pl5eearemacdtsoifnooivnren.nc2ta4Tis7hoenemAas.dlrbmiTevahfecoehrrieeenna.tcesihlraeoendwpidniatgsn. lookonly12minuteslobehigh-speedmachined.Intheamountoflimeittooktoproduce onepanontheconventionalmachine,fivepanscouldbeproducedonthehigh-speed machine. Insummary,Ilisimportanttoincreasetheaveragevelocityinordertoreducepart productionlime.Thegoalistoachievethehipestacceleraiionpossible. AccelerationandBandwidth dynamicAsc.ceMleortaotrisonhaivselilmiimtietdedbypetawkoafcaccetloerrsa:ttihornusstdecfaipnaecdilbyyoifhtehmeadrxiivemuamndcumrarcehniintehat canbeappliedacrossthewindingsatagiventime.Ingeneral,thisisnonhelimiting fparcetvoer.niAtchceelmearcahtiinoenifsruosmuarlelaychliinmgitheidgbhyacmcaeclherianteiodnysn.amTihces.reaVsiobnraitsitohnastivnitbhreatdiroinvselirail theoverallposicionaibandwidthofthesystem.Thebandwidthofthesystemisan indicationofhowthesystemrespondsloimnsienisinIhelimedomain.

See more

The list of books you might like

Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.