ABSTRACT
Thesameprocedureisthenrepeatedinapplicationtothebottombackuproll. Figure12.17illustratesanapplicationoftheCookmethodinthegaugecontrolsystembasedonthe
gaugemeterprinciple.Themillstandisprovidedwithsensorsthatproduceoutputsignalsinaccordance withtheangularpositionofthetopandbottombackuprolls.Thesesignalsarereceivedbytwocontrollers,oneforeachbackuproll.Thesecontrollersthengeneratetherollgapcorrectionsignalsetandeb tocompensatefortherolleccentricityofthetopandbottombackuprollsaccordingtothefollowing equations:
where
(12-18)
(12-19)
Et=At/Ks,amplitudeofrollgapcorrectionsignalrelatedtotopbackuprolleccentricity Eb=Ab/Ks,amplitudeofrollgapcorrectionsignalrelatedtobottombackuprolleccentricity Ks=millstructuralstiffnessofrelatedsideofmill.
