毕业设计（论文）-单机架可逆轧机液压AGC控制策略研究.doc

摘要 板带材厚度精度是板带材产品的两大质量指标之一。厚度自动控制简称为AGC(Automatic Gauge Control)，是现代化冷轧薄板生产中实现高精度轧制的重要手段。目前随着轧制理论、控制理论和人工智能理论的发展，以及他们在轧制工程中的应用，使得板带产品的厚度精度与板形指标有了很大程度的提高。然而，对单机架可逆式冷带轧机采用专门的控制技术，用以实现对板带材的高精度控制，仍是板厚控制领域研究的热点问题之一. 本文在收集和消化大量国内外相关文献的基础上，对自动厚度控制的基本理论以及轧机的几种AGC控制方式进行了研究，为今后研究更高精度的轧机控制系统提供理论依据。根据液压AGC系统的构成，详细推导了液压轧机负载动态数学模型，建立了单机架可逆冷带轧机液压AGC位置控制系统的数学模型。在得出液压AGC系统数学模型的基础上，应用单神经元自适应PID算法对控制器进行了设计。 最后，通过Matlab软件，对所建模型进行了仿真分析，证明这种方法具有响应较快，超调量小等优点，并且系统的鲁棒性好，达到了设计要求。 关键词：液压AGC；位置控制系统；单神经元自适应PID；仿真 Abstract The accuracy of strip gauge is one of the two key quality targets in strip production. Automatic Gauge Control is called AGC for short. Meanwhile,it’s a important means to achieve the high accuracy in modem tandem cole rolling.At present,huge advancements have been derived with the development of rolling theory,control theory and artificial intelligence theory and with their application in the rolling process.However,it is still one of researching hotspot problem in strip gauge control field that single stand invertible strip mill adopts special control technology and achieves high level control accuracy. In this paper, basic theory of automatic guage control and several AGC control method are studide and analyzed on the basis of collecting and digesting related literature at home and abroad.It provides the way to the higher accuracy research an provides the theory references.Based on the structure of the hydraulic AGC system,dynamic mathematical model of hydraulic mills are deduced and founded in detail.And then designd the controller by using the single neuron adaptive PID algorithm. At last, the model are simulated and analyzed by using Matlab software.The improved system is proved that it has many advantages.For example,fast response,small overshoot,better robust performance and so on. Keywords:hydraulic AGC; position control system; single neuron adaptive PID ; simulation 第1章 绪论 厚度是板带钢最主要的尺寸之一，随着技术的进步，厚度自动控制已成为现代化板带钢生产中不可缺少的重要组成部分。厚度自动控制（AGC-Automation Gauge Control）的基本方