【作者】 邹芳云；

【导师】 赵众；

【作者基本信息】 北京化工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 闭环条件下的系统辨识以及基于模型的先进控制技术,一直都是过程控制领域研究的重要内容,它对指导工业生产、完善教学实践具有十分重要的理论意义和应用价值。本文围绕闭环辨识和鲁棒内模PID优化整定展开研究,将粒子群优化算法、线性矩阵不等式和OPC技术等引入到复杂工业过程控制系统的设计和优化上,依据这些理论开发了面向工业过程应用的控制系统设计和优化工具软件Loop-Doctor(注册号:2007SRBJ3237),并将其成功应用于工业实践。本论文的主要研究成果包括以下几个方面:1、提出将粒子群优化算法和闭环辨识结合起来辨识过程模型参数,并根据内模控制原理,进行内模PID控制器的设计和优化。2、将利用小增益定理分析的鲁棒稳定性问题转化为线性矩阵不等式的求解,并提出基于极小极大原理和基于线性矩阵不等式两种鲁棒PID控制器设计方法,通过仿真实例证明了这两种方法的有效性。3、提出将OPC客户端程序作为数据采集系统,介绍了OPC技术的相关知识,并在Visual Basic环境下开发OPC数据采集应用程序功能模块,成功实现与集散控制系统的数据访问。4、以Visual C#.net为开发平台、以研究的理论结果为基础,开发出面向实际工业应用的控制系统设计和优化工具软件Loop-Doctor(注册号:2007SRBJ3237),并将其成功应用于中石化塔河分公司柴油加氢装置和中石化北京化工研究院蒸汽裂解装置的优化控制项目,改善控制系统性能显著,使装置运行平稳,提高了产品质量和经济效益。更多还原

【Abstract】 The closed-loop identification and the advanced process control technology based on the model are important for the research of process control. It is of great significance for theory and application to guide the industrial production and improve teaching practice. Focusing on the closed-loop identification and robust IMC-PID optimal tuning, the PSO algorithm, LMI method and OPC technology are introduced into the design and optimization of complicated industrial control system. According to all of the methods, we developed a tool—Loop-Doctor(registered number: 2007SRBJ3237) which can be used for designing and optimizing the control system in industry applications. The software had been applied to industrial practice. In the thesis, the main research contribution is described as follows: (1) A method about combining the PSO algorithm with closed-loop identification to identify the process model parameters is proposed. According to IMC-PID principle, the PID controllers can be designed and optimized. (2) The robust stability problem analysed by the small gain theorem and soluted by LMI method. Then, two methods was proposed that design robust PID controller based on the principle of Min-Max and LMI. Some examples proved the effectiveness of the two methods. (3) The data collection system was researched following OPC data access and the related knowledge about OPC technology was introduced. Then, the OPC client as data collection application modules was developed in the Visual Basic development environment and successfully applied in the Distributed Control System data access.(4) A design and optimization software—Loop-Doctor was develped in the development platform of Visual C #.net based on the methods. It has been successfully applied to steam catalyst cracking unit in the Beijing academe of Chemical Technology and diesel hydrogenation pilot plant in SINOPEC. The application of the software improved the control system performance significantly and enhanced the product quality and economic benefits.更多还原