CAREER: Studies in the Transition Control of Multi-Product Chemical Reactors

摘要-科萨诺维奇-9703252本研究的目标是建立一个严谨的理论框架，用于设计多产品化学反应器的有效反馈控制策略。这一动机是由全球市场经济提供的，它要求使用相同的设备高效地制造多个等级的单一产品，同时将不合格材料的生产降至最低，并保持安全和环境限制。该项目是解决这一问题的基本办法，首先对业务的多重性质进行建模和分析，最终形成一个框架，以便设计一种混合监督控制战略。具体地说：(1)将开发局部近似模型来表示每个操作点的多个过程操作和约束，以及(2)将设计动态监控控制器以从一组可能的控制器中选择最佳控制器并切换到操作中，该控制器将提供更好的设定值跟踪。这项研究将为过渡控制问题提供新的和基本的见解，从而形成一个新的理论框架，将多分辨率建模和鲁棒控制器设计与闭环系统的稳定性和性能分析相结合。预期的结果将加强研究生和本科生的化学工程师教育。这方面的例子包括：开发算法形式的数值程序，以引入多分辨率模型识别；将过渡控制纳入现有的过程控制课程；开发实验室实验，为拟议的概念提供积极的实验和具体经验；通过合作的外部培训方案与工业界合作，使学生接触多产品工艺；以及利用与工业界学生的讲习班和论文项目，促进技术转让。

Abstract - Kosanovich - 9703252 The objective this research is the development of a rigorous theoretical framework that can be used to design an effective feedback control strategy for multi-product chemical reactors. The motivation is provided by a global market economy which demands that the manufacture of multiple grades of a single product be made efficiently using the same equipment while simultaneously minimizing the production of off-spec material and maintaining safety and environmental constraints. This project is a fundamental approach to this problem that starts with modeling and analysis of the multiple nature of the operations leading to a framework that permits the design of a hybrid supervisory control strategy. Specifically: (1) local approximation models will be developed to represent the multiple process operations and constraints at each operating point, and (2) a dynamic supervisory controller will be designed to select and to switch into operation, the best controller from a set of possible controllers, that will provide superior setpoint tracking. This research will provide new and fundamental insights into the transition control problem, resulting in a new theoretical framework that combines multi-resolution modeling and robust controller design with analysis of stability and performance of the closed-loop system. The expected results will enhance the education of chemical engineers at the graduate and undergraduate levels. Examples of this include: the development of numerical programs in the form of algorithms to introduce multi-resolution model identification; the inclusion of transition control to the existing process control course; the development of a laboratory experiment to provide active experimentation and concrete experience of the proposed concepts; the collaboration with industry through co-operative externship programs to expose students to multi-product processes; and the use of workshops and thesis projects with industrial students to facilitate technology transfer.