退火炉温度控制系统的Smith补偿控制策略研究毕业设计.doc

（ 二 〇 年 月Abstract Annealing furnace is the important cold-rolled steel sheet heat treatment thermal equipment, it directly affect the quality of products and the production as well as cost, playing a critical role in production. Research anneal furnace temperature control system has a great significance in improving product quality, boosting productivity, improving environment and reducing the consumption of energy. This context is gas type annealing furnace for research object launch. Annealing furnace is a rather complicated controlled station, it has some characters including time varying, nonlinearity and uncertainty etc. Combine experimental methods with political experiences, we determine the annealing furnace the transfer function of objects. Pure time-delay link has a serious influence on the system of control effect, result in largening the system of overshoot, elongating accommodation time, even come with oscillation and volatilization. With regard to this kind of industry controlled member, it is difficult to ensure system small overshoot or no overshoot if we adopt common PID system. The context design Smith estimated compensating controller aiming at big lag. It can be seen from simulation result, this controller can make anneal furnace temperature control process soon achieve steady and the system of overshoot is better controlled. Keywords: Annealing furnace; pure time-delay; Smith estimated compensating controller 目 录 第一章 绪论 1 1.1 退火炉温度控制研究的目的及意义 1 1.2 退火炉温度控制系统的研究状况 2 1.2.1 国际发展现状 2 1.2.2 国内发展现状 3 1.2.3 退火炉控制系统的新进展 4 1.3 本论文的主要工作 4 第二章 退火炉的建模 6 2.1 煤气罩式退火炉系统介绍 6 2.2 退火炉动态特性实验测定 7 2.2.1 系统建模过程 8 2.2.2 被控对象的实验数据处理 9 第三章 被控对象分析 11 3.1 纯滞后介绍 11 3.1.1 纯滞后的产生 11 3.1.2 纯滞后的相关定义 11 3.2 纯滞后对控制性能指标的影响 12 3.3 被控对象控制策略的选取 13 第四章 施密斯预估控制 14 4.1 施密斯预估控制原理 14 4.2 施密斯预估器的计算机实现 15 4.2.1 计算机纯滞后补偿控制系统 15 4.2.2 纯滞后补偿控制的算法 16 4.3 施密斯预估器的缺点 18 第五章 控制系统的设计与仿真 19 5.1 被控对象的动态特性 19 5.2 调节器的参数整定 19 5.2.1 衰减曲线经验公式法 19 5.2.2 调节器的参数整定过程 21 5.3 带有施密斯预估控制器的系统仿真 23 5.3.1 时域系统