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

摘要：本研究的目的是发展一个严格的理论框架，可用于设计多产品化学反应器的有效反馈控制策略。全球市场经济要求使用相同的设备高效地制造单一产品的多个等级，同时最大限度地减少不合规格材料的生产，并保持安全和环境限制。这个项目是解决这个问题的一个基本方法，它从对操作的多重性质进行建模和分析开始，从而形成一个允许设计混合监督控制策略的框架。具体来说：(1)将开发局部近似模型来表示每个工作点的多个过程操作和约束，(2)将设计一个动态监督控制器，从一组可能的控制器中选择并切换到操作中，这将提供优越的设定值跟踪。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。预期的结果将提高化学工程师在研究生和本科水平的教育。这方面的例子包括：以算法的形式开发数值程序，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过程；开发一个实验室实验，为所提出的概念提供积极的实验和具体的经验；通过合作实习项目与行业合作，让学生接触多产品流程；并利用研讨会和论文项目与工业学生促进技术转移。

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.