热轧带钢宽度的专家控制系统设计.doc

热轧带钢宽度的专家控制系统设计
摘要
在钢铁生产工业中,轧钢生产是制成钢材的主要生产环节,也是钢铁生产全部工艺过程的质量水平的标志,因此,提高轧钢生产技术状况,关系到钢材的产量、质量、品种和效益,也直接影响到国民经济各行各业的发展。而热轧带钢宽度精度是热轧产品质量的重要指标之一,良好的宽度精度不仅可以提高产品的成材率,而且将给热轧用户及后部工序创造更好的生产条件,因此宽度控制是钢铁企业在设备能力一定的情况下,提高成品的质量的重要保证。
专家系统理论与技术的迅速发展及其在控制工程中的应用,为智能控制开辟了一个新的研究方向。专家控制的出现,改变了传统的控制系统设计中单纯依靠数学模型的局面,使知识模型与数学模型相结合,知识信息处理技术与传统的信号处理技术相结合,它是人工智能与控制理论、方法和技术相结合的典型产物。它已广泛应用于故障诊断、工业设计和过程控制,为解决工业控制难题提供一种新的方法,是实现工业过程控制的重要技术。
本文以某钢铁企业1549mm热连轧厂为实际研究对象,针对在带钢侧压和水平轧制变形的特点和工艺参数,采用专家PID 控制器对热轧带钢的粗轧机部分进行宽度控制,分析总结引起宽度变形的主要因素,根据热轧带钢的宽度控制机理,设计出带钢热连轧生产过程中宽度专家控制系统,使带钢的宽度精度达到90%,使成品卷沿全长宽度公差达到允许范围之内。
关键字:热轧带钢;宽度控制;专家PID控制器
Design of the expert control system of the hot rolling strip width
Abstract
In the production of steel, rolled steel is the main production link and can show the quality of the whole processes. Therefore, to improve the production technique of rolled steel relates to the quantity, quality, species and efficiency of the steel and has a direct bearing on the development of national width and accuracy of the hot rolling strip is one of the most important index of quality of hot rolling products. Fine width and accuracy can not only increase the finished product ratio, but also provide better production conditions for users and post processes. Therefore, given certain equipment capability of a steel enterprise, width control is the key to improving the quality of products.
Expert System for the rapid development of theory and technology and its application in control engineering for intelligent control opened a new research direction. The emergence of expert control, changing the traditional control system design, the situation of relying solely on mathematical models, mathematical model of the knowledge model and bination of knowledge and information processing technology and traditional signal processing technology, it is the artificial intelligence and control theory, methods and techniques typical product of bination. It has been widely used in fault diag