Modellierung, Beobachterentwurf und Regelung von kontinuierlichen Brammenwärmöfen

Projektschwerpunkte

• Modellbildung und Parameteridentifikation von kontinuierlichen Wärmöfen
• Beobachterentwurf für nicht messbare Systemgrößen
• Modellbasierte Regelung und Optimierung nichtlinearer dynamischer Systeme
• Nichtlineare modellprädiktive Regelung von Produkttemperaturen

Beschreibung

In der Stahlindustrie werden Durchlauföfen zur Erwärmung von Brammen (bis zu 40 Tonnen schwere Stahlblöcke) eingesetzt, ehe diese im nachfolgenden Walzprozess umgeformt werden. Während des energie- und kostenintensiven Erwärmprozesses werden die aneinandergereihten Brammen kontinuierlich durch den gas- oder ölbefeuerten Ofenraum befördert. Der Energieverbrauch eines Brammenwärmofens mittlerer Größe entspricht etwa dem Gesamtenergiebedarf einer Stadt mit 25000 Einwohnern. Die beim Walzen benötigte Materialtemperatur liegt zwischen 1050 und 1200 Grad Celsius und muss aus Qualitätsgründen bei der Erwärmung im Ofen möglichst exakt erreicht werden.

Kontinuierlicher Brammenwärmofen.

Die dem System zugeführte Wärmeenergie wird aus stöchiometrischen Rechnungen des Verbrennungsvorganges ermittelt. Die Wärmeübertragung in die Brammen erfolgt durch Konvektion und vor allem Wärmestrahlung. Basierend auf einer geometrischen Diskretisierung des Ofenraums werden Massen-, Energie- und Strahlungsbilanzen in mathematischen Modellen berücksichtigt. Es handelt sich um ein nichtlineares dynamisches System, das aufgrund der diskontinuierlichen Brammenbewegung schaltenden Charakter aufweist.

Eine heiße Bramme wird aus dem Ofen entnommen, Copyright: Dillinger Hüttenwerke AG.

Ausgewählte Veröffentlichungen

• A. Steinboeck and A. Kugi, Optimized pacing of continuous reheating furnaces, in Proceedings of European Control Conference ECC 2013, Zürich, Switzerland, 2013, p. 4454 – 4459.
  [BibTex]

  @InProceedings{Steinboeck13b,
  author = {A. Steinboeck and A. Kugi},
  title = {{Optimized pacing of continuous reheating furnaces}},
  booktitle = {Proceedings of European Control Conference ECC 2013},
  year = {2013},
  month = {7},
  pages = {4454 -- 4459},
  url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6669132},
  address = {Z\"{u}rich, Switzerland},
  }

• A. Steinboeck, D. Wild, and A. Kugi, Energy-Efficient Control of Continuous Reheating Furnaces, in Proceedings of 15th IFAC Symposium on Control, Optimization and Automation in Mining, Mineral & Metal Processing, San Diego, USA, 2013, p. 359 – 364.
  [BibTex]

  @InProceedings{Steinbock13,
  author = {A. Steinboeck and D. Wild and A. Kugi},
  title = {{Energy-Efficient Control of Continuous Reheating Furnaces}},
  booktitle = {Proceedings of 15th IFAC Symposium on Control, Optimization and Automation in Mining, Mineral \& Metal Processing},
  year = {2013},
  month = {8},
  pages = {359 -- 364},
  doi = {10.3182/20130825-4-US-2038.00007},
  address = {San Diego, USA},
  }

• A. Steinboeck, D. Wild, and A. Kugi, Nonlinear model predictive control of a continuous slab reheating furnace, Control Engineering Practice, vol. 21, iss. 4, p. 495–508, 2013.
  [BibTex] [Download]

  @Article{Steinboeck13,
  Title = {{Nonlinear model predictive control of a continuous slab reheating furnace}},
  Author = {A. Steinboeck and D. Wild and A. Kugi},
  Journal = {Control Engineering Practice},
  Pages = {495--508},
  Volume = {21},
  Year = {2013},
  Number = {4},
  Doi = {10.1016/j.conengprac.2012.11.012},
  }

• A. Steinboeck, D. Wild, and A. Kugi, Optimal Trajectory Planning and Control of a Continuous Slab Reheating Furnace, in Proceedings of the IFAC Workshop on Automation in the Mining, Mineral and Metal Industries, Gifu, Japan, 2012, p. 169 – 174.
  [BibTex]

  @InProceedings{Steinbock12,
  author = {A. Steinboeck and D. Wild and A. Kugi},
  title = {{O}ptimal {T}rajectory {P}lanning and {C}ontrol of a {C}ontinuous {S}lab {R}eheating {F}urnace},
  booktitle = {Proceedings of the IFAC Workshop on Automation in the Mining, Mineral and Metal Industries},
  year = {2012},
  month = {9},
  pages = {169 -- 174},
  address = {Gifu, Japan},
  }

• A. Steinboeck, K. Graichen, and A. Kugi, Dynamic Optimization of a Slab Reheating Furnace with consistent Approximation of Control Variables, IEEE Transactions on Control Systems Technology, vol. 19, p. 1444–1456, 2011.
  [BibTex] [Download]

  @Article{Steinboeck11a,
  Title = {{Dynamic Optimization of a Slab Reheating Furnace with consistent Approximation of Control Variables}},
  Author = {A. Steinboeck and K. Graichen and A. Kugi},
  Journal = {IEEE Transactions on Control Systems Technology},
  Pages = {1444--1456},
  Volume = {19},
  Year = {2011},
  Doi = {10.1109/TCST.2010.2087379},
  }

• A. Steinboeck, K. Graichen, D. Wild, T. Kiefer, and A. Kugi, Model-based trajectory planning, optimization, and open-loop control of a continuous slab reheating furnace, Journal of Process Control, vol. 21, iss. 2, p. 279–292, 2011.
  [BibTex] [Download]

  @Article{Steinbock11a,
  Title = {Model-based trajectory planning, optimization, and open-loop control of a continuous slab reheating furnace},
  Author = {A. Steinboeck and K. Graichen and D. Wild and T. Kiefer and A. Kugi},
  Journal = {Journal of Process Control},
  Pages = {279--292},
  Volume = {21},
  Year = {2011},
  Number = {2},
  Doi = {10.1016/j.jprocont.2010.08.004},
  }

• A. Steinboeck, D. Wild, and A. Kugi, Feedback Tracking Control of Continuous Reheating Furnances, in Proceedings of the 18th IFAC World Congress, Milano, Italia, 2011, p. 11744–11749.
  [BibTex]

  @InProceedings{Steinbock11,
  author = {A. Steinboeck and D. Wild and A. Kugi},
  title = {{F}eedback {T}racking {C}ontrol of {C}ontinuous {R}eheating {F}urnances},
  booktitle = {Proceedings of the 18th IFAC World Congress},
  year = {2011},
  month = {8},
  pages = {11744--11749},
  doi = {10.3182/20110828-6-IT-1002.01639},
  address = {Milano, Italia},
  }

• A. Steinboeck, D. Wild, T. Kiefer, and A. Kugi, A mathematical model of a slab reheating furnace with radiative heat transfer and non-participating gaseous media, International Journal of Heat and Mass Transfer, vol. 53, pp. 5933-5946, 2010.
  [BibTex] [Download]

  @Article{Steinbock10,
  Title = {A mathematical model of a slab reheating furnace with radiative heat transfer and non-participating gaseous media},
  Author = {A. Steinboeck and D. Wild and T. Kiefer and A. Kugi},
  Journal = {International Journal of Heat and Mass Transfer},
  Pages = {5933-5946},
  Volume = {53},
  Year = {2010},
  Doi = {10.1016/j.ijheatmasstransfer.2010.07.029},
  }

• D. Wild, T. Meurer, and A. Kugi, Modelling and Experimental Model Validation for a Pusher-type Reheating Furnace, Mathematical and Computer Modelling of Dynamical Systems, vol. 15, iss. 3, p. 209–232, 2009.
  [BibTex] [Download]

  @Article{Wild09,
  Title = {Modelling and Experimental Model Validation for a Pusher-type Reheating Furnace},
  Author = {D. Wild and T. Meurer and A. Kugi},
  Journal = {Mathematical and Computer Modelling of Dynamical Systems},
  Pages = {209--232},
  Volume = {15},
  Year = {2009},
  Number = {3},
  Doi = {10.1080/13873950902927683},
  }