非匀速轧制过程中层流冷却控制系统的研究与应用.ppt

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1、10thInternationalConferenceonSteelRollingLIUEn-yangResearchandApplicationofLaminarCoolingControlSystemunderNon-constantSpeedRollingTheStateKeyLaboratoryofRollingandAutomationNortheasternUniversity,ChinaSep2010BeijingBackgroundsEquipmentsandcontrolsystemLaminarcoolingcontrolmodelSegmen

2、ttrackingandrecalculationResultsofapplicationOutlineImportanceofcoilingtemperaturecontrol(CTC)AccelerativerollingscheduleInaccuracyofCTCofahotstripmillBackgroundsEquipmentsFig.1LaminarcoolingequipmentsofahotstripmillMaincoolingsectionTrimmingsectionLaminarcoolingsystemFig.2Structureof

3、laminarcoolingcontrolsystemAircoolingmodelMathematicmodelsLawofStephen-BoltzmannLaminarcoolingmodelFourier'sLaw(1)(2)FeedbackcontrolMathematicmodels(3)PIDControllerFig.3PI-SmithPredictorRecalculationSetupFig.4IllustrationofrecalculationEverysegmentinthecoolingareacanbearecalculationpo

4、int;Temperaturedrop△TCalculatewateramountfromBank6RecalculationSetupFig.5Segmenttrackingandspeedforecast:thespeedoftheithsegmentattimej;WhenthefirstsegmentpassesPY301,speedofthefirstsegmentisv[1,0];RecalculationSetupWhenthesecondsegmentpassesPY301:WhenthethirdsegmentpassesPY301:Whenst

5、riptailendleavesF2stand:(4)(5)(6)(7)ResultsofapplicationCurvesbeforeoptimization;(b)Curvesafteroptimization1－Measuredcoilingtemperature;2－±20℃toleranceofcoilingtemperature;3－StripspeedFig.6CoilingtemperatureandstripspeedcurvesResultsofapplication(c)Q450NQR1,thickness5.0mm,CT620℃;(d)JH

6、80Q,thickness6.35mm,CT580℃Fig.6CoilingtemperatureandstripspeedcurvesFig.6Newlaminarcoolingsystemusedinhotstripmills(e)DD13,thickness3.5mm,CT700℃;(f)X80,thickness12.10mm,CT510℃ResultsofapplicationPhotosoflaminarcoolinga1700mmhotstripmilla1580mmhotstripmillFig.7Laminarcoolingequipmentsa

7、twork10thInternationalConferenceonSteelRollingThankyouforyourattention!