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《钢铁研究学报(英文版)》2016,(2):116-123
Variable estimation for finishing mill set-up in hot rolling is greatly affected by measurement uncertainties, variations in the incoming bar conditions and product changes.The fuzzy C-means algorithm was evaluated for rule-base generation for fuzzy and fuzzy grey-box temperature estimation.Experimental data were collected from a real-life mill and three different sets were randomly drawn.The first set was used for rule-generation,the second set was used for training those systems with learning capabilities,while the third one was used for validation.The perform-ance of the developed systems was evaluated by five performance measures applied over the prediction error with the validation set and was compared with that of the empirical rule-base fuzzy systems and the physical model used in plant.The results show that the fuzzy C-means generated rule-bases improve temperature estimation;however,the best results are obtained when fuzzy C-means algorithm,grey-box modeling and learning functions are combined. Application of fuzzy C-means rule generation brings improvement on performance of up to 72%. 相似文献
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以某热连轧生产线主传动F1~F4机架增容改造为背景,对交交变频主传动的控制系统进行了设计、装置制造、调试及新功能开发。从传动系统的稳态分析及轧制过渡过程入手,推导了交交变频传动系统带负荷观测器和不带负荷观测器的传递函数,利用MATLAB进行稳定性分析,找到了轧机振动的原因,提出了抑制措施。投入负荷观测器后,对抑制轧机振动起到了良好的实际效果。 相似文献
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热轧精轧侧导板控制方法的改进 总被引:1,自引:0,他引:1
1750热轧线在生产薄规格时经常由于轧烂,破坏轧制稳定性,严重影响产品质量。究其原因都是由于带钢尾部在机架内跑偏、甩尾等原因造成轧烂。介绍了通过对控制方法优化的改进,将侧导板开口度按带钢头部、中部、尾部分段设定,实现侧导板开口度多次摆位控制方法,保证了带钢沿轧制中心线稳态运行。 相似文献
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通过对热连轧带钢的生产过程中精轧机发生尾部轧烂的事故原因进行了分析,并介绍了减少尾部轧烂事故的方法和措施. 相似文献
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精轧机机架间带钢冷却控制系统 ,用电气控制信号和压缩空气联合控制冷却水的流量 ,从而达到热轧带钢温度控制的目的。介绍了带钢冷却控制系统的工作原理、关键元器件及应用实例 相似文献
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铝板带热连轧的温度控制对带材质量起着十分重要的作用。目前国外在热连轧机上已普遍采用以数学模型为基础的温度控制系统,对精轧机组的穿带速度及机架间冷却液进行预设定,然后用测温计测值与目标值进行比较,实现闭环反馈控制,通过控制轧制速度及冷却液的流量来控制带材的温度。本文论述了热连轧机温度控制系统的组成,分析了控制温度的方法及过程。 相似文献
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Abstract: In the hot strip rolling control system, the temperature distribution and deformation resistance are the main parameters affecting prediction of rolling force. In order to improve the model prediction precision, an optimiza- tion algorithm based on objective function was put forward, in which the penalty function index was adopted. During the adaptation process, the temperature distribution and deformation resistance were taken as the optimized parame ters, and the Nelder-Mead simplex algorithm was used to search the optimal solution of the objective function. Fur thermore, the temperature adaptation and force adaptation were solved simultaneously. Application results show that the method can improve the accuracy of the rolling force model obviously, and it can meet the demand of the indus trial production and has a good application prospect. 相似文献
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结合武钢热轧厂精轧压下系统,阐明了高压、大流量、双伺服阀液压缸自动位置控制(HAPC)的基本特点,描述了各模块功能分配和信号流程,介绍了相关C语言块实现的功能,具有普遍的指导意义。 相似文献