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1,1,2,1(11,066004;21)[],1450mm,,,,[];;;[]TG33419[]A[]100027059(2006)0620040205ApplicationresearchofoilmembranethicknesscompensationinautomaticgaugecontrolsystemoftandemcoldmillFANGYi2ming1,LIJian1,WANGHai2fang2,CHENGang1(1.ElectricEngineeringInstitute,YanshanUniversity,Qinhuangdao066004,China;2.YanshanUniversity)Abstract:Oilmembranethicknesscompensationcontrolprincipleisintroduced.Rollergapvalueanditsvarianceatthedifferentrollingspeedandpressurehavebeenmeasuredforan1450mmfivestandstandemcoldmill.Oilmembranethicknesscompensationcontrolisrealizedbymethodoflook2uptableandinterpo2lationapproach.Hencestripthicknesscontrolaccuracyatrollingmillacceleratinganddeceleratingiseffi2cientlyimproved,lengthofout2tolerancebetweenheadandtailisreduced,andcontrolprecisionofgaugedifferenceofsamestripandrateoffinishedproductarealsoimproved.Keywords:oilmembranethicknesscompensation;tandemcoldmill;automaticgaugecontrol;methodoflook2uptable,,;,,,,,[1]1270mm,,,,,[23],Reynolds1450mm,(),,[]2006203202;[]2006207206[](F2005000389);(B2004523)[](19652),,,,,04MetallurgicalIndustryAutomation2006No6,,,1ReynoldsQfnP[4]Qf=(n/P)(n/P)+(1),,,,,hh=G+f(P)-Of(2),G;f(P),h=0,(2)G=Of-f(P)(3)P,,(3)G1=Of1-f(P)(4)G2=Of2-f(P)(5)(4),(5)Of2-Of1=G2-G1(6),,f(P),Of(P0n0)Of0(4)(5)P0,(6)(1),n/P=n0/P0,Of0,,2,,,2000,4000,6000,8000,10000,12000kN(),,,(121538,501618),(540mm)(1370mm),115Tab1Thecylinderdisplacementmeasuredofthefifthstandatdifferentforceandspeedmn/(r/min)P/kN2000400060008000100001200010-23289-23694-24099-24553-24997-2544130-23148-23592-24036-24491-24946-2540150-23029-23505-23981-24446-24908-2537070-22967-23453-23939-24416-24884-2535290-22889-23391-23893-24379-24866-25353110-22871-23361-23851-24353-24854-25355130-22789-23312-23835-24339-24848-25357150-22760-23287-23814-24326-24835-25344170-22733-23263-23793-24310-24828-25346190-22715-23253-23791-24305-24824-25343210-22705-23244-23783-24297-24821-25345230-22691-23235-23779-24297-24814-25331250-22690-23233-23776-24295-24811-25327Sony(),(),,50mm,,1420066,n0=20r/min,P0=8000kN()Of,225Tab2Therelativeoilmembranethicknessofthefifthstandmn/(r/min)P/kN20004000600080001000012000101227822417-37-481-92530136892448025-430-885501487101153570-392-8547015491063577100-368-8369016271125623137-350-83711016451155665163-338-83913017271204681177-332-84115017561229702190-319-82817017831253723206-312-83019018011263725211-308-82721018111272733219-305-82923018251281737219-298-81525018261283740221-295-8112,11,;1,,1Fig1Therelativeoilmembranethicknesscurvesatdifferentspeedandrollingforce3311TDC,:2,,,,,,,i,[j,j+1],L=a[i,j]H=a[i,j+1],2(L,H),,:Of=L+(n-nj)(H-L)nj+1-nj(7)2Fig2Sketchmapofsubsectionlinearization:3000kN20r/min,2000kN,[10,30],[1227,1368],(7)129715m312[5]h=G+P-P0Mp-Of(8),Mp(8)[6]h=G+PMp-Of(9)W=-Ph,24MetallurgicalIndustryAutomation2006No6P=-Wh(10),W(10)(9)G=h(1+WMp)+Of(11)h=0,GOf=Of(12),GOf=AOf(13),A,0151313,[7]3PID,(11)1+WMp4(a)53Fig3StructureofthicknesscontrolsystemwiththefunctionofoilmembranethicknesscompensationG0;G;K;hc45Fig4Thesteelstripthicknesscurveofthefifthstandwhenoilmembranethicknesscompensationisaddedornot3420066,,,,,4(b)5,,,4(),1450mm,,,,[][1].1270mm[D].:,2003.[2],,,.[J].,2001,36(11):42245.CHENJian2hua,ZHANGQi2sheng,LIBing,etal.Researchonmathematicalmodelofoilfilmgageonplaterollingmill[J].IronandSteel,2001,36(11):42245.[3].AGC[D].:,2003.[4].[M].:,1995.[5],.AGC[J].,2001,18(5):51254.WANGJun,WANGGuo2dong.Analysisandreviewoilvari2ouspressureAGCmodels[J].SteelRolling,2001,18(5):51254.[6],,,.[J].,1999,23(1):24227.ZHANGDian2hua,WANGJun,CHUEn2hui,etal.GaugecontroloftandemcoldmillinthestatekeylaboratoryofNortheasternUniversity[J].MetallurgicalIndustryAutoma2tion,1999,23(1):24227.[7],,,.PID[J].,1999,23(4):30233.FANGYi2ming,JIAOXiao2hong,ZHAOXian2chao,etal.Applicationofself2tuningPIDcontrolinAGCsystemforcold2stripmill[J].MetallurgicalIndustryAutomation,1999,23(4):30233.[:](39),,;(3),,AFC,9218%03I,AFC4ClecimAFC,,1800mmAFCAFC[][1],,,.[J].,2002,26(1):41244.HUAJian2xin,JINYi2hui,WUWen2bin,etal.Spraycoolingcontrolinflatnesscontroloncoldrollingmill[J].Metallurgi2calIndustryAutomation,2002,26(1):41244.[2],,,.[J].(),1996,17(3):2482251.LIUJian2chang,GUShu2sheng,ZHOUYing,etal.Optimumalgorithmofflatnesssyntheticalcontrol[J].JournalofNorth2easternUniversity(NaturalScience),1996,17(3):2482251.[:],2007230,:,44MetallurgicalIndustryAutomation2006No6