热连轧机自适应前馈厚度调节系统的仿真研究
The Simulative Study of Adaptive Feedforward AGC System of Hot Strip Mills
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摘要: 本文用数字仿真的方法,对热连轧机厚度调节系统克服水印温差干扰的方法进行了分析 和研究.文中提出通过实测连轧机前架轧制力作为前馈补偿量来预报后架轧制力,并通过对 后架轧制力进行自适应跟踪修正前馈补偿量的方法,可以有效地克服水印温差干扰.文中并 提出根据残差平方和最小的原则,优选滤波增益因子,可以改进下一块钢的自适应效果.仿真 计算的结果表明,应用本文方法效果显著.文中提出的方法,可供改造旧系统或设计类似新系 统时参考.Abstract: This paper gives the investigation of AGC system of hot strip mills by digital simulation, and the aim is to overcome the temperature disturbances especially caused by the skid marks. The new control method introduces the feed forward signal into the control loop. The features are to measure the rolling force of front stand and to forecast the rolling force of next stand for feed forward compensation by adaptive correction, and to select the gain factor of adaptive filter by residual minimisation. The result of simulative caculation has shown that the new control method can improve the control precision distinctly when the system is under disturbance of skid marks.
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