东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (6): 827-830.DOI: 10.12068/j.issn.1005-3026.2014.06.015

• 材料与冶金 • 上一篇    下一篇

总括热吸收率的基本辨识

伊智，张卫军，陈海耿   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-08-12 修回日期:2013-08-12 出版日期:2014-06-15 发布日期:2014-04-11
  • 通讯作者: 伊智
  • 作者简介:伊智(1982-)，男，辽宁沈阳人，东北大学博士后研究人员;张卫军(1957-)，男，辽宁沈阳人，东北大学教授;陈海耿(1944-)，男，福建龙海人，东北大学教授，博士生导师.
  • 基金资助:
    国家高技术研究发展计划项目(2011AA060104);中央高校基本科研业务费青年教师科研创新基金项目(N120302003).

Basic Identification for the Total Heat Exchange Factor

YI Zhi， ZHANG Weijun， CHEN Haigeng   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-08-12 Revised:2013-08-12 Online:2014-06-15 Published:2014-04-11
  • Contact: YI Zhi
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摘要： 加热炉二级控制系统通常采用总括热吸收率法作为核心模型，而总括热吸收率既是结构参数的函数，也是操作参数的函数，因此其辨识较为困难.以宝钢2050热轧厂3号加热炉进行的拖偶实验为例，详细阐述了基本辨识的过程.对实验数据进行整理，并采用表面温度梯度法反演CF.推导了CF基本辨识体系的完整表达式，同时对辨识结果进行必要的分析.反演过程中发现，当采样点较多时，反演的钢坯表面热流呈振荡趋势，这是采样周期与测量系统的分辨率不匹配所导致的.由基本辨识的sCF曲线可知，当钢坯静止时，在同一位置处CF值是变化的，这证实了CF动态补偿的必要性.

关键词: 总括热吸收率, 拖偶实验, 表面温度梯度法, 基本辨识, 历经炉温

Abstract: The total heat exchange factor method is used as core model for L2 control system of reheating furnace. Total heat exchange factor is not only a function of structure parameters， but also a function of operating parameters， thus the identification for it is hard. Based on the drag thermocouple experiment of No3 reheating furnace in 2050 hot rolling mill in BaoSteel， basic identification was researched. The experiment data were arranged. Meanwhile， CF was identified by surface temperature gradient method. Finally， complete expression of the identification system was derived， and the result of basic recognition was analyzed. In the process of identification with a large number of sampling points， the surface heat flux curves appeared oscillating. It was caused by the mismatching between sampling period and system resolution. The CF curves show that the values of CF at the same site are different when the slab is still. So the compensation for CF is necessary.

Key words: total heat exchange factor, drag thermocouple experiment, surface temperature gradient method, basic identification, experience furnace temperature

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