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Blast Furnace Dynamics Using Multiple Autoregressive Models with Exogenous Inputs

机译:高炉动力学,使用带有外源输入的多个自回归模型

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摘要

Autoregressive models with exogenous inputs are useful tools for analyzing systems with unknown dynamics, but are limited by the assumption that the relations between inputs and output(s) are linear. For complex systems with nonlinear or abruptly changing dynamics it is possible to modify the technique by allowing for multiple local models and designing a strategy for switching between them. A method by which this can be realized is developed in the paper. The technique is applied on a complex problem in the metallurgical industry, i.e., the prediction of hot metal silicon content in the blast furnace. A set of local models is developed for different parts of a training set, using a statistical criterion for model selection. The resulting local models are then applied to predict future values of the silicon content. It is demonstrated that the method is capable to develop models, among which a proper choice can be made for prediction. The potential of multi-step predictions is also studied. Finally, some conclusions concerning the method and the results are drawn.
机译:具有外源输入的自回归模型是分析动力学未知的系统的有用工具,但受输入和输出之间的关系是线性的假设的限制。对于具有非线性或突然变化的动力学的复杂系统,可以通过允许多个局部模型并设计在它们之间切换的策略来修改技术。本文提出了一种可以实现这一目标的方法。该技术应用于冶金工业中的一个复杂问题,即高炉中铁硅含量的预测。使用用于模型选择的统计标准为训练集的不同部分开发了一组局部模型。然后将所得的局部模型应用于预测硅含量的未来值。证明了该方法能够开发模型,其中可以做出适当的选择以进行预测。还研究了多步预测的潜力。最后,得出关于该方法和结果的一些结论。

著录项

  • 来源
    《ISIJ international》 |2012年第10期|p.1764-1771|共8页
  • 作者单位

    Thermal and Flow Engineering Laboratory, Department of Chemical Engineering, Abo Akademi University, Biskopsgatan 8, Fl-20500 Abo, Finland;

    Thermal and Flow Engineering Laboratory, Department of Chemical Engineering, Abo Akademi University, Biskopsgatan 8, Fl-20500 Abo, Finland;

    Thermal and Flow Engineering Laboratory, Department of Chemical Engineering, Abo Akademi University, Biskopsgatan 8, Fl-20500 Abo, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    blast furnace; prediction; hot metal; multiple models;

    机译:高炉;预测;铁水多种型号;

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