EP1037842B1 - Verfahren und anordnung zur vorhersage und regelung einer papierwickelkenngrösse bei einer papierwickelvorrichtung - Google Patents

Verfahren und anordnung zur vorhersage und regelung einer papierwickelkenngrösse bei einer papierwickelvorrichtung Download PDF

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Publication number
EP1037842B1
EP1037842B1 EP98965599A EP98965599A EP1037842B1 EP 1037842 B1 EP1037842 B1 EP 1037842B1 EP 98965599 A EP98965599 A EP 98965599A EP 98965599 A EP98965599 A EP 98965599A EP 1037842 B1 EP1037842 B1 EP 1037842B1
Authority
EP
European Patent Office
Prior art keywords
paper
characteristic variable
paper winding
winding
winding characteristic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98965599A
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German (de)
English (en)
French (fr)
Other versions
EP1037842A1 (de
Inventor
Willfried Wienholt
Clemens SCHÄFFNER
Helmut Liepold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP1037842A1 publication Critical patent/EP1037842A1/de
Application granted granted Critical
Publication of EP1037842B1 publication Critical patent/EP1037842B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/26—Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/14—Diameter, e.g. of roll or package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/34—Pressure, e.g. fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/20—Calculating means; Controlling methods
    • B65H2557/264—Calculating means; Controlling methods with key characteristics based on closed loop control
    • B65H2557/2644—Calculating means; Controlling methods with key characteristics based on closed loop control characterised by PID control

Definitions

  • the average layer thickness is: during the reeling process here the number of layers wound up and the radius increase certainly. Average over 100 layers is obtained so the average layer thickness. To the average layer thickness between to be able to compare individual types of paper better, one relates this size to the paper thickness in the relaxed Condition of the respective variety. You get a key figure that is usually less than 1. The smaller it is, the more the roll is wound harder; one speaks in this context also of high winding hardness. In the other case it is the mean normalized layer thickness is relatively large, which with a corresponds to low winding hardness.
  • the problem underlying the invention therefore exists in providing a method and arrangement whereby a Relevant paper winding parameter during the paper winding process can be predicted or regulated.
  • the result of the prediction of the paper winding parameter can be advantageous to take advantage of the usual in paper winding devices constant forces according to the to influence the desired nominal paper winding parameter by a controller, the behavior of the paper winding parameter dependent on the influence force is embossed and this one from the nominal winding parameter and the predicted current paper winding parameter formed control difference is supplied, from which he determines a compensation force that one during the winding process significant influence is superimposed.
  • the method and the arrangement can also be advantageous then use if the paper winding from a larger Wrapping on smaller wraps is done and the paper in Is cut.
  • the result of the various predicted current paper roll parameters can advantageously be overlaid to a common size in order to control the controller.
  • simple measured variables such as the radius of the paper or the angular velocity of the different paper rolls, are advantageously detected in order to predict the current paper winding parameter or to determine the layer thickness from these variables.
  • the proposed methods can be particularly advantageous or arrangements for regulating the line force as well also use the regulation of the tractive force as an influencing force.
  • Neural networks can be used as a predictor and as Controllers Use PID controllers, because with these devices sufficient Experience exists and no great effort to Training or to adapt these facilities to the special Problems with paper wrapping is required.
  • the proposed arrangements can be advantageous Use paper roll cutters because there are high quality requirements exist and using the proposed procedures an improvement can be achieved.
  • the proposed method and the proposed method can be advantageous Arrangement also for paper-like materials are used that have similar mechanical properties, d. H. viscoelastic behavior and elastic / plastic deformation, like paper.
  • Figure 1 shows schematically the structure of a backup roller winder with the radius r as the winding radius, F as the web tension in front of the backup roller St and the web speed v.
  • the paper web is designated with P.
  • F AW is the developed web tension or also the web force on the reel.
  • M H denotes the drive torque of the center drive of the winding tube and M S denotes the drive torque of the back-up roll, the winding being designated Wi and the tube being Hul.
  • a line force Lin occurs which can be influenced by mechanical devices.
  • Several paper webs have already been wound over one another on the winding Wi, which is indicated by concentric circles.
  • the first paper roll which represents the drum, is not shown, but only the second paper roll Wi on which the paper web P is wound.
  • the first paper roll from which it is unwound is located in front of it in the direction of the force F and corresponds essentially to the second roll, whereby it can differ from it by its width.
  • the web force F AW depends on the control variables and other influencing variables such. B. the paper and the environment.
  • Control variables are, for example, the drive torques M S of the support roller St and the center drive M H , the line force Lin with which the winding Wi is pressed onto the support roller St, the web tensile force in front of the nip F, and occasionally friction damper settings with which vertical movements of the angle Wi on the support roller St by hydraulic dampers or by eddy current brakes.
  • Influencing variables are, for example, the paper properties, such as the modulus of elasticity, the weight per unit area in relation to the density, the roughness, the smoothness, the moisture, the porosity and the elongation at break of the paper the paper web widths are taken into account.
  • the machine data contain general information for the winding process.
  • the role data are preferably produced for each Role provided.
  • the measurable Data on these paper wrappers are currently under construction provided depending on the diameter, but it is also the provision depending on the time or conceivable from other measured variables of the device.
  • Figures 3 and 4 show, for example, the courses of different stations of a paper roll cutter.
  • the influencing force is the web tension and upwards the average layer thickness.
  • a relationship Z10 or Z20 results from these surveys, which can be used to control the paper winding parameter, in this case the mean normalized layer thickness, using an influencing force.
  • the roll-up curves for different web trains are determined individually depending on different types of paper or for different stations.
  • a predictor in particular a neuronal predictor, can be defined which, based on the curve data of the reeling and unrolling, has a current diameter or another measurable one Characteristic d (n) predicts the value rewinding to diameter d (n + ⁇ ).
  • the predictor can also use other / further characteristic data as input variables. That is, it predicts the current roll thickness as a paper winding parameter.
  • w (i) mean the parameters of the neural network NN 2 .
  • the index ⁇ means an estimated value, i the number of the station if several winding stations are used and ⁇ a value correlated with time.
  • the parameters w (i) / 2 must be determined for the respective stations i. This is usually done by minimizing a cost function using a gradient method and the values from the measured roll-up and roll-up curves to the different throws, ie winding processes. These data are preferably sorted according to paper types and within the paper types according to the stations used.
  • the special structure of the neural network enables a simplified, two-stage procedure.
  • z (n) is set to 0 for all n and the parameters W (i) / 1 ... W (i) / 3 are calculated by solving the resulting (over-determined) multilinear system of equations. Known standard methods such as singular value decomposition can be used for this purpose.
  • the parameter w (i) / 4 is now determined in such a way that the remaining residual error of the multilinear model is minimized.
  • the individual predictions y and (i) (n + ⁇ ) are preferably combined with the aid of a further neural network NN 3 to form a parameter if several paper winding stations are used in the reeling process.
  • y (n + ⁇ ) NN 3 ( y (I) (N + ⁇ ))
  • y (N + ⁇ ) ⁇ Mean y (I) (n + ⁇ )
  • y (N + ⁇ ) Max ⁇ y (I) (n + ⁇ )
  • This measure corresponds to a special implementation of a "Mixing of Experts" with neural networks. Any predictor provides a station-specific neuronal expert with regard to the roll thickness or another paper wrap parameter and the contributions of all experts an input variable for the controller is formed. Because during one Winding process, not all stations are always active, or in In extreme cases, only one station is operated, preferably only the contributions of the active stations are taken into account.
  • the prediction value y and serves as an estimate of the roll-up value for the diameter d or another time-corrected variable. This is intended to y in addition to the setpoint for the paper winding characteristic variable and preferably the preset value of the web tension F 'is to processed at the control process.
  • time is used as the argument here and a time delay T t for the stages of the control loop concerned has been assumed to simplify the illustration.
  • the diameter prediction horizon ⁇ must be selected so that the time delay in the individual stages is compensated for.
  • the controller R is supplied with a control difference from the setpoint specification y Soll and the estimated value y and (t).
  • the controller R is designed as a PID controller and uses the relationship between force and average layer thickness as the paper winding parameter that was determined at the input.
  • a motor controller KS predetermined target force F should be corrected '(t). Accordingly, by varying the impact force F soll (t) is obtained of the force controller KS at the individual winding stations S1 to S11 of the winding apparatus WV a desired winding layer thickness or a desired winding layer thickness profile during the winding process.
  • measured values are recorded at the individual stations S1 to S11 for the winding and at the unwinding station of the reel AB and a layer thickness is determined from this as a function of a dead time T t , this dead time being necessary for determining or calculating the influencing variable from the measured variables.
  • predictors P1 to P11 are provided, to which these specific influencing variables are fed, and which predict a current layer thickness at the current time. That is, the predictors compensate for the dead time that elapses to determine the influencing variables from the measured variables. If several stations are provided, as shown here in FIG. 6, a combination unit KOM is used, which in a suitable manner superimposes the individual prediction results to an estimated value y and (t).
  • the force controller KS is in common paper winding devices already prior art and serves to keep constant the set force F soll (t).
  • a correction force for the force F ' target (t) is determined.
  • the web tension correction compensates for the observed fluctuations in the roll-up curve, because the web tension increases with an increasing value of the roll-up layer thickness, and the web tension is reduced with a decreasing roll-up layer thickness compared to the nominal value. Because of the mechanical properties of the paper, ie due to the process, the web tension correction must not exceed or fall below certain values. For this reason, it is preferable to provide a limitation, for example by hard limits according to: or also by soft limits, which are characterized by a differentiable limitation function, for example based on the arctan function. In the case of more complicated relationships, the use of a neural network as a limiter is also conceivable.
  • a nominal paper winding parameter is corrected by a predicted paper winding parameter and in the controller R, which regulates the dependence of the influence on the paper winding parameter, a nominal correction force is generated which corresponds to the control difference from the predicted current paper winding parameter and nominal paper winding parameter.
  • a corrected target force F is to set (t) to fix the paper winding characteristic variable at the individual winding stations, and second paper winding S1 to S11. In some cases, more or fewer winding stations can also be provided on the winding device.
  • predictors do not have to be provided for each winding device, but in some cases only the measured values of such winding stations can be recorded and predicted to an estimated value, which is known to be at the upper or lower end of the spread of the quality parameters of the winding process are located. That is, a particularly good or a particularly bad station is preferably selected.
  • the influencing force is regulated in the same way for all winding stations.
  • the influencing forces can be regulated separately for each winding station.
  • the control arrangement from FIG. 5 can be used in such arrangements.
  • the line force as well as the web tensile force can be used to regulate the winding device both as an influencing force.
  • Figure 5 shows the regulation of the line force in a winding device.
  • the web tension can also be regulated in a corresponding manner without restricting the invention, provided that the web tension of individual winding stations F1 to F11 can be regulated separately.
  • the illustration in FIG. 5 differs from that in FIG. 6 only in that a line force L is entered instead of the web tensile force F and in that reel-specific regulators RI or KSI are provided. Analogous to the known mode of operation from FIG.
  • this controller or this control arrangement regulates a predetermined nominal paper winding parameter by means of a correction force influencing the default force for the force controller KSI, which is derived from a predicted estimated value y and (i) (t) to form the control difference, which is fed to the controller has been derived.
  • the individual individual winding device is designated by WVI in FIG. 5. It is conceivable that in addition to the described regulation of the roll-up thickness as a paper roll influencing variable, a further improvement can be achieved by the web tensile force if the line force is also regulated or in combination with the web tensile force.
  • the target line force L ' is influenced and corrected by the controller RI and that the force control loop already present on the winding device, which regulates the influence force L (i) (t), can be used without change, so that no change occurs existing paper winding devices is required. These are usually able to regulate a constant influence during the winding process.
  • the dependence of the mean roll thickness as a paper roll influencing variable on the line force as an influencing force is first determined and approximated by a linear trend line, or the relationship is learned by a function approximator.
  • the predictor PI is shaped on the basis of the known relationships between the processing of the reel and the winding of the paper wrap. That is, Measurements with different forces must also be carried out in advance and plotted for the line force in an analogous manner to that in FIG. 2.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Paper (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Winding Of Webs (AREA)
  • Replacement Of Web Rolls (AREA)
EP98965599A 1997-12-10 1998-12-01 Verfahren und anordnung zur vorhersage und regelung einer papierwickelkenngrösse bei einer papierwickelvorrichtung Expired - Lifetime EP1037842B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19754878 1997-12-10
DE19754878A DE19754878A1 (de) 1997-12-10 1997-12-10 Verfahren und Anordnung zur Vorhersage und Regelung einer Papierwickelkenngröße bei einer Papierwickelvorrichtung
PCT/DE1998/003531 WO1999029604A1 (de) 1997-12-10 1998-12-01 Verfahren und anordnung zur vorhersage und regelung einer papierwickelkenngrösse bei einer papierwickelvorrichtung

Publications (2)

Publication Number Publication Date
EP1037842A1 EP1037842A1 (de) 2000-09-27
EP1037842B1 true EP1037842B1 (de) 2002-06-05

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EP98965599A Expired - Lifetime EP1037842B1 (de) 1997-12-10 1998-12-01 Verfahren und anordnung zur vorhersage und regelung einer papierwickelkenngrösse bei einer papierwickelvorrichtung

Country Status (11)

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US (1) US6363297B1 (pt)
EP (1) EP1037842B1 (pt)
AT (1) ATE218493T1 (pt)
BR (1) BR9813509A (pt)
CA (1) CA2313461A1 (pt)
DE (2) DE19754878A1 (pt)
DK (1) DK1037842T3 (pt)
ES (1) ES2178304T3 (pt)
NO (1) NO317470B1 (pt)
PT (1) PT1037842E (pt)
WO (1) WO1999029604A1 (pt)

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FI114943B (fi) * 2001-04-25 2005-01-31 Metso Paper Inc Paperin radiaalisen kimmomodulin mittaus
FI111033B (fi) * 2001-06-15 2003-05-15 Metso Paper Inc Menetelmä rullan tiheyden määrittämiseksi
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DE10326304A1 (de) * 2003-06-11 2005-02-03 Voith Fabrics Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer Tissuebahn
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US8032246B2 (en) * 2007-02-02 2011-10-04 Kimberly-Clark Worldwide, Inc. Winding method for uniform properties
US7891276B2 (en) * 2007-08-31 2011-02-22 Kimbelry-Clark Worldwide, Inc. System and method for controlling the length of a discrete segment of a continuous web of elastic material
DE102009019624A1 (de) * 2009-04-30 2010-11-04 Robert Bosch Gmbh Verfahren zur Bestimmung wenigstens eines Reglerparameters eines Regelglieds in einem Bahnspannungs-Regelkreis für eine Bearbeitungsmaschine
CN102353587B (zh) * 2011-06-23 2012-12-05 杭州电子科技大学 柔性卷绕物弹性模量在线软检测电路
JP7360381B2 (ja) * 2018-03-29 2023-10-12 富士フイルム株式会社 巻き取り条件生成装置、巻き取り装置、巻き取り条件算出方法、巻き取り方法
AT524284B1 (de) * 2020-10-15 2022-06-15 B & R Ind Automation Gmbh Parametrierung eines Zugkraftreglers

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Also Published As

Publication number Publication date
NO317470B1 (no) 2004-11-01
WO1999029604A1 (de) 1999-06-17
DK1037842T3 (da) 2002-09-30
US6363297B1 (en) 2002-03-26
BR9813509A (pt) 2000-10-03
DE59804370D1 (de) 2002-07-11
ATE218493T1 (de) 2002-06-15
PT1037842E (pt) 2002-11-29
NO20002995D0 (no) 2000-06-09
EP1037842A1 (de) 2000-09-27
DE19754878A1 (de) 1999-06-24
ES2178304T3 (es) 2002-12-16
CA2313461A1 (en) 1999-06-17
NO20002995L (no) 2000-06-09

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