Profilmatic Advanced profile control strategies - Voith
Profilmatic Advanced profile control strategies - Voith
Profilmatic Advanced profile control strategies - Voith
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<strong>Profilmatic</strong><strong>Advanced</strong> <strong>profile</strong> <strong>control</strong> <strong>strategies</strong>ModuleProModuleCoatActuators1 2 3Control Response ArraySheet PositionSheetEdgeMachineDirectionEdge Control OptionsSupervisory ControlManual ControlFixed OutputRatioed OutputAbsolute OutputSupervisory ControlManual ControlFixed OutputRatioed OutputAbsolute OutputSupervisory ControlManual ControlFixed OutputRatioed OutputAbsolute OutputEdge Actuator ControlModuleIRModuleThermActuator Splitting LogicCompromise Control LogicEdge Actuator Control TuningOptimized Actuator SetpointFast Caliper Profile ControlMaximum quality and production<strong>Profilmatic</strong> <strong>control</strong> is capable ofThe following options are availableDepending on the application, itThe <strong>Profilmatic</strong> CD caliper <strong>profile</strong>benefits can be achieved from twoweighting a secondary qualityfor those actuators that are outsidemay be required to operate actuator<strong>control</strong> provides unique capabilitiesactuators by using multiple CD<strong>profile</strong> into the primary <strong>profile</strong>. Forthe sheet width:arrays at either a minimum orto improve quality and maximizeactuator <strong>control</strong>.<strong>Profilmatic</strong> decomposes a singlequality <strong>profile</strong> into short term andlong-term cross direction disturbancesbased on actuator spacing.These arrays are fed forward to<strong>control</strong> each actuator system andexample, it might be desirableto take the moisture <strong>profile</strong> intoaccount when <strong>control</strong>ling the basisweight <strong>profile</strong>. The factoring canbe done for the total <strong>profile</strong> or forindividual <strong>control</strong> zones.■■■■Manual <strong>control</strong>Controlled to a fixed valueRelative <strong>control</strong> ratioed againstthe last measured zone insidethe sheetAbsolute offset against the lastmeasured zone inside the sheetmaximum value.This generally applies to steamboxesin order to maintain maximumproduction and remoisturizers toapply minimum re-wetting.<strong>Profilmatic</strong> set-up tables are<strong>control</strong> response.ModuleTherm with <strong>Profilmatic</strong><strong>control</strong> incorporates a model-basedheat <strong>control</strong> algorithm. It initiallyapplies full heating power or coolinguntil desired zone temperature isreached. This significantly reducesdecoupled upstream. For example,provided for this purpose.the <strong>profile</strong> settling time followingif the first actuator is at a limit, ita break, grade change or processautomatically transfers the correc-disturbance.tion to the next upstream actuator.67
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