EP2249984A1 - Procédé et dispositif de régulation des grandeurs de commande dans des équipements techniques de fonderie - Google Patents

Procédé et dispositif de régulation des grandeurs de commande dans des équipements techniques de fonderie

Info

Publication number
EP2249984A1
EP2249984A1 EP09709203A EP09709203A EP2249984A1 EP 2249984 A1 EP2249984 A1 EP 2249984A1 EP 09709203 A EP09709203 A EP 09709203A EP 09709203 A EP09709203 A EP 09709203A EP 2249984 A1 EP2249984 A1 EP 2249984A1
Authority
EP
European Patent Office
Prior art keywords
variable
control
actuator
oil
controlled
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.)
Withdrawn
Application number
EP09709203A
Other languages
German (de)
English (en)
Inventor
Axel Weyer
Martin Klein
Uwe Kopfstedt
Erich Hovestädt
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.)
SMS Siemag AG
Original Assignee
SMS Siemag 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
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2249984A1 publication Critical patent/EP2249984A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product

Definitions

  • the invention relates to a method and apparatus for controlling a wide variety of controlled variables in metallurgical plants such as steel mills, continuous casters, rolling mills for example control of hydraulic, electrical and pneumatic devices with a control system, with the from the reference variable and the feedback large the calculation of a taken place control deviation is performed and a new control variable for the controlled system is specified, with which the example consisting of a valve actuator converts the controlled variable, then with the process supplied total supply of, for example, hydraulic oil, water, air, electrical voltage or electricity the given supply is regulated.
  • the controlled variable is influenced according to the following principle.
  • the control system receives the reference variable for the controlled variable and calculates the so-called control deviation from the feedback variable.
  • the manipulated variable for the controlled system is specified.
  • the controlled system valves, etc.
  • the controlled system must implement this value from the given supply (hydraulic oil, electrical voltage, water, air, etc.) and feed it to the further process, whereby the controlled system is often not available in the current state of the art It is able to precisely control the controlled variable from a given supply quantity with corresponding accuracy by more than a limited ratio.
  • DE 2 344438 describes a method for controlling the cooling of a strand emerging from a continuous casting strand with the possibility of cooling the strand material in individual zones exactly to the extent that corresponds to the change in the heat transfer resistance with increasing solidification.
  • the reference quantity of the groundwater quantity which is based on the optimum amount of water, is set.
  • the coolant quantities applied to the individual strand sections are determined by integrating the speed of the individual strand sections over the running time and simultaneous retention of the time spent by a strand section in the cooling region, compared with corresponding lead quantities and the residual coolant quantities still to be applied to these strand sections ,
  • the setting is then made by adjustable slides or possibly by appropriate
  • the coolant quantity of all spray units is jointly controlled by a valve.
  • DE 103 21 791 A1 discloses a method for controlling the temperature of a metal strip in a hot rolling finishing train, wherein a target function for actuators is formed by comparing a desired temperature profile with an actual temperature profile, the deviations from any in the finishing train Positioned target specifications are recorded metrologically and mass flow (belt speed) and coolant flow on the one hand by prediction and on the other hand online by solving a quadratic optimization problem with linear constraints regulated or controlled.
  • the object of the invention is to further develop the existing control of various control variables in metallurgical plants so that even with commercial conventional actuators with a small control range, the control system and a larger desired controlled variable always secured and reproducible with a optimal and improved control quality sets.
  • At least one actuator with variably adjustable controlled variable for example a control valve, with at least one actuator with adjustable controlled variable, for example a switching valve, is connected in parallel in the controlled system.
  • the latter actuator (and all others) are, for example, pure open-close
  • the fixed value is adjustable and forms part of the supply value.
  • the passage parameters of the actuator such as resistance, throttle, line diameter changed and / or other actuators are connected in parallel.
  • the desired control variable must not be adjusted in this way only by an actuator with a limited control ratio, but is set from a freely selectable manipulated variable x combined with a fixed value. This results in a significantly extended control range and a more accurate and / or exact adjustability (or improved control performance) for the entire control task.
  • the prerequisite here is that the solid actuators have a nearly constant and reproducible property in the control value output.
  • the hysteresis h results in a smaller required control range S for the variable control variable actuator, which is determined as follows:
  • FIG. 1 shows a control scheme according to the prior art
  • FIG. 2 shows a controlled system with three actuators connected in parallel
  • FIG. 3 shows a control diagram for high-level control
  • FIG. 4 shows a control diagram for turning it down
  • FIG. 1 shows a control scheme according to the prior art
  • FIG. 2 shows a controlled system with three actuators connected in parallel
  • FIG. 3 shows a control diagram for high-level control
  • FIG. 4 shows a control diagram for turning it down
  • FIG. 1 shows a control scheme according to the prior art
  • FIG. 2 shows a controlled system with three actuators connected in parallel
  • FIG. 3 shows a control diagram for high-level control
  • FIG. 4 shows a control diagram for turning it down
  • FIG. 4 shows a control diagram for turning it down
  • Fig. 5 control diagram for up and down rules of the constant actuator.
  • FIG 1 a conventional control scheme according to the prior art in the form of a flow chart is shown.
  • the starting point here is the control system 3, in which a predetermined reference variable 1 and a current feedback variable 2 are input for calculating the manipulated variable 4.
  • the manipulated variable 4 then sets in the actuator 5 with a certain control ratio the control variable 7, with the then from the supply 6, the total supply required in the process 10 is provided.
  • the manipulated variable 4 calculated by the control system 3 is fed into a controlled system (actuator circuit) 8 shown in FIG.
  • a controlled system actuator circuit 8 shown in FIG.
  • three actuators are connected in parallel with each other in the illustrated embodiment.
  • Each of these actuators 5 1 , 2 , 0 is connected to the supply 6 and removes this one of its controlled variable 7i, 2 , n correspondingly large supply subset 6i, 2 , n> summed up, the control variable 7 corresponding to the process 10 to be supplied total supply amount ,
  • the trained with adjustable control ratio actuator 5i acts on the total control variable 7 with a variable controlled variable 7i and the parallel connected actuators ⁇ 2 and 5 n each with a fixed set control variable 7 2 and controlled variable 7 n .
  • the actuator 5i For desired values greater than x, the actuator 5i must also set only values of x minus fixed control variable 7 2 to 100% minus fixed set control variable 7 2 reproducible, so can safely realize the large bandwidth of the entire control range despite a small control ratio.
  • the down-regulation required of the value x of the actuator 5i to a low value then the fixed set control variable 7 2 from the value x to the required control variable 7 to supplement is shown in dashed lines.
  • connection 11 and the shutdown 12 of the actuator 5 2 is shown according to the indicated directional arrows.
  • the different switching on and off operations of FIGS. 3 and 4 caused by the hysteresis h, as well as the position of the switching points x and xh, are emphasized more clearly by this illustration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feedback Control In General (AREA)
  • Continuous Casting (AREA)

Abstract

Les exigences en matière de régulation des différentes grandeurs de réglage dans les équipements techniques de fonderie sont actuellement tellement élevées que le rapport de régulation nécessaire des éléments de commande (vannes, etc.) est souvent nettement supérieur à ce qui est disponible sur le marché. En vue de pouvoir effectuer un réglage toujours sécurisé et reproductible d'une grandeur de régulation plus élevée souhaitée avec une qualité de régulation optimale et améliorée, même avec des éléments de commande courants ayant une petite plage de régulation, ce afin de réaliser une plage de régulation la plus grande possible pour la quantité d'approvisionnement totale, l'invention emploie un circuit d'élément de commande (8) avec lequel, lors d'une augmentation de la consigne à partir d'une grandeur de commande (4) = x vers un élément de commande existant (51) à grandeur de régulation variable (71), au moins un élément de commande supplémentaire (52) à grandeur de régulation libre mais à réglage fixe (72) est branché en parallèle et la quantité d'approvisionnement totale est réglée de manière combinée à partir de cette grandeur de commande (4) = x par la grandeur de régulation fixe (72) et la grandeur de régulation variable (71).
EP09709203A 2008-02-06 2009-01-23 Procédé et dispositif de régulation des grandeurs de commande dans des équipements techniques de fonderie Withdrawn EP2249984A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810007802 DE102008007802A1 (de) 2008-02-06 2008-02-06 Verfahren und Einrichtung zur Regelung von Stellgrößen in hütten-technischen Anlagen
PCT/EP2009/000420 WO2009097977A1 (fr) 2008-02-06 2009-01-23 Procédé et dispositif de régulation des grandeurs de commande dans des équipements techniques de fonderie

Publications (1)

Publication Number Publication Date
EP2249984A1 true EP2249984A1 (fr) 2010-11-17

Family

ID=40462577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09709203A Withdrawn EP2249984A1 (fr) 2008-02-06 2009-01-23 Procédé et dispositif de régulation des grandeurs de commande dans des équipements techniques de fonderie

Country Status (5)

Country Link
EP (1) EP2249984A1 (fr)
CN (1) CN101939121A (fr)
DE (1) DE102008007802A1 (fr)
RU (1) RU2448805C1 (fr)
WO (1) WO2009097977A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3234705B1 (fr) * 2014-12-17 2020-01-15 Primetals Technologies Austria GmbH Procédé de fonctionnement d'une installation métallurgique à fonctionnement optimisé

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5217329A (en) * 1975-07-31 1977-02-09 Toshiba Machine Co Ltd Die casting apparatus with gas and liquid pressure
FR2356422A1 (fr) * 1976-03-01 1978-01-27 Delalande Sa Nouveaux hydroxymethyl-5 oxazolidinone-2, leur procede de preparation et leur application en therapeutique
JP2598298B2 (ja) * 1988-04-22 1997-04-09 新日本製鐵株式会社 連続鋳造における２次冷却方法
JPH03151148A (ja) * 1989-11-06 1991-06-27 Kawasaki Steel Corp 連鋳における２次冷却水流量計の異常検知方法
JPH0740018A (ja) * 1993-08-04 1995-02-10 Kawasaki Steel Corp 連鋳２次冷却用スプレーノズルの閉塞防止方法
WO1995024285A1 (fr) * 1994-03-07 1995-09-14 Nippon Steel Corporation Procede et appareil de coulage continu
US6264767B1 (en) * 1995-06-07 2001-07-24 Ipsco Enterprises Inc. Method of producing martensite-or bainite-rich steel using steckel mill and controlled cooling
DE50101613D1 (de) * 2000-04-20 2004-04-08 Procontrol Ag Flawil Verfahren sowie antriebssystem für die steuerung/regelung der linearen press-/giessbewegung
DE10321791A1 (de) 2003-05-14 2004-12-30 Siemens Ag Verfahren zur Regelung der Temperatur eines Metallbandes, insbesondere in einer Fertigstraße zum Walzen von Metall-Warmband
JP3854942B2 (ja) * 2003-05-16 2006-12-06 東洋機械金属株式会社 ダイカスト装置
CN2668298Y (zh) * 2003-09-27 2005-01-05 北京威远达工业控制工程有限公司 水平连续铸造用拉坯仪
DE102005036060A1 (de) * 2004-10-15 2006-11-16 Bosch Rexroth Aktiengesellschaft Hydraulisch betätigte Gießeinheit
DE102005034202A1 (de) * 2004-10-15 2006-04-20 Bosch Rexroth Aktiengesellschaft Hydraulisch betätigte Gießeinheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009097977A1 *

Also Published As

Publication number Publication date
RU2010136962A (ru) 2012-03-20
CN101939121A (zh) 2011-01-05
RU2448805C1 (ru) 2012-04-27
WO2009097977A1 (fr) 2009-08-13
DE102008007802A1 (de) 2009-08-13

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