Large Scale Control System Theory and Applications

大规模控制系统理论与应用

• 批准号: RGPIN-2014-06057
• 负责人: Davison, Edward
• 金额: $ 3.06万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=567561
• 关键词: Large; Scale; Control; System; Theory

LARGE SCALE CONTROL SYSTEMS AND APPLICATIONS BACKGROUND: The field of Control Systems and Automation deals with the problem of modifying the behaviour of a system, so that something "desirable" occurs. For example in a chemical factory, which has literally 100's of measurements and 100's of control valves to vary, it is desired that the plant should produce some desired output product , e.g. a polymer. In this case however it is impossible to have a single human or even a group of humans to be able to correctly adjust the valves (inputs) of the plant to achieve the desired product due to the complexity of the plant's behaviour, and due to the fact that disturbances, which are unmeasurable, are always present. To achieve this objective of controlling a plant, a "controller" is used, which typically is a set of instructions on a computer. "Simple plants" generally have a "centralized controller" in which all information of the system is fed into the computer but, for complex systems such as a chemical plant, it is not realistic to have such a centralized controller and a " decentralized controller", which consists of many sub-controllers, each of which are all isolated from each other, is used. The problem however, is that the theory of "decentralized control" is still incomplete, and decentralized control design is still in its infancy. RESEARCH STUDY PROPOSED: The research project proposed is a continuation of previous studies made by the applicant on so called "Large scale control systems theory". In particular the focus is about decentralized control, and in particular the design of decentralized controllers. NEW THEORY PROPOSED: In terms of the new theory being developed, a focus on: (i) Clarifying the properties of decentralized fixed modes (DFM), which are still not well understood, will be made (ii) An attempt on obtaining the fundamental limitations of decentralized control will be made (iii) A new decentralized controller design method for plants will be attempted which has the property that it requires no mathematical model; it is believed that such a design approach is important, because model building is difficult to carry out in industrial systems. (iv) A study of various complex decentralized control design methods will be made. NEW APPLICATION PROBLEMS PROPOSED: In conjunction with new theory, it is of great interest to determine how well the theory actually "works" when applied to real world problems, and so some application problems will also be studied, which are interesting in their own right. (i) A controller for new generation hard disc drive systems will be designed which is believed will be an order of magnitude faster than existing disc drives (Western Digital Corp., Advanced Servo-Mechanical Technologies, San Jose, CA, USA are interested in this new controller design; note:there appears to be no Canadian company to interact with.) (ii) A large generalized electric power management system and decentralized controller for the autonomous mode operation of a microgrid system that includes multiple distributed energy resource (DER) units will be carried out. This type of problem is important in microgrid systems and will be an order of magnitude more demanding than previous studies. (iii) The problem of developing a controller which works "well" for the case of patients with spinal cord injury will be carried out. (iv) A study of the decentralized control of third generation large flexible space structures (LFSS) will be made; in particular necessary and sufficient conditions for a a solution to exist and a controller characterization will be made. The theory will be tested out on applying it to the MSAT II LFSS.

背景：控制系统和自动化领域处理修改系统的行为的问题，使得“期望的”事情发生。例如，在化学工厂中，实际上具有100个测量值和100个控制阀来改变，期望工厂应该生产一些期望的输出产品，例如聚合物。然而，在这种情况下，由于设备行为的复杂性，并且由于总是存在不可测量的干扰的事实，不可能有单个人或甚至一组人能够正确地调节设备的阀（输入）以实现期望的产品。为了实现控制工厂的目标，使用“控制器”，其通常是计算机上的一组指令。“简单工厂”通常有一个“集中控制器”，其中系统的所有信息都输入计算机，但对于复杂的系统，如化工厂，这是不现实的，有这样一个集中控制器和“分散控制器”，其中包括许多子控制器，每个都是彼此隔离，使用。然而，问题是，“分散控制”的理论仍然是不完整的，分散控制设计仍然处于起步阶段。研究计划：该研究项目是申请人在所谓的“大规模控制系统理论”方面所做研究的延续。特别是重点是关于分散控制，特别是分散控制器的设计。提出新理论：根据正在发展的新理论，重点是：（i）澄清分散固定模式（DFM）的属性，这仍然没有很好地理解，将作出（ii）试图获得分散控制的基本限制，将作出（iii）将尝试一种新的分散控制器设计方法的植物，它具有的属性，它不需要数学模型;人们相信，这种设计方法是重要的，因为在工业系统中很难进行建模。(iv)将研究各种复杂的分散控制设计方法。提出的新应用问题：与新理论相结合，确定理论在应用于真实的世界问题时实际上“工作”的程度是非常有趣的，因此也将研究一些应用问题，这些问题本身也很有趣。(i)将设计用于新一代硬盘驱动器系统的控制器，其被认为将比现有的盘驱动器快一个数量级（Western Digital Corp.，美国加利福尼亚州圣何塞的高级伺服机械技术公司对这种新的控制器设计感兴趣;注意：似乎没有加拿大公司可以与之互动。） (ii)一个大型的通用电力管理系统和分散式控制器的自主模式操作的微电网系统，包括多个分布式能源（DER）单元将进行。这类问题在微电网系统中很重要，并且比以前的研究要求高出一个数量级。(iii)开发一个控制器的工作“以及”的情况下，脊髓损伤患者的问题将进行。(iv)本文将研究第三代大型柔性空间结构（LFSS）的分散控制问题，特别是给出一个解存在的充分必要条件和控制器的特征。该理论将在MSAT II LFSS上得到验证。