Large Scale Control System Theory and Applications

大型控制系统及其应用 背景： 控制系统和自动化领域涉及修改系统行为的问题，以便某些东西 “令人向往的”发生了。例如，在一家化工厂，字面上有100英尺的S测量阀和100英尺的S控制阀 为了有所不同，工厂需要生产一些所需的输出产品，例如聚合物。然而，在这种情况下 一个人甚至一组人不可能正确地调整植物的阀门(输入) 由于工厂行为的复杂性，以及由于干扰的事实，这些干扰 不可估量的，总是存在的。 为了实现控制工厂的这一目标，需要使用“控制器”，它通常是计算机上的一组指令。 “简单工厂”通常有一个“中央控制器”，系统的所有信息都被输入到计算机中，但对于 像化工厂这样的复杂系统，要有这样一个集中式控制器和“分散式控制器”是不现实的， 它由许多子控制器组成，每个子控制器都彼此隔离。然而，问题是， 分散控制理论尚不完善，分散控制设计尚处于起步阶段。 研究报告建议： 提出的研究项目是申请人先前对所谓的“大规模控制系统”所做研究的继续 尤其是关于分散控制，特别是分散控制器的设计。 提出了新的理论： 就正在开发的新理论而言，重点是： (I)将澄清仍未很好理解的分散固定模式(DFM)的性质 (2)将尝试获得分散控制的基本限制 (3)将尝试一种新的对象分散控制器设计方法，该方法具有所需的特性 没有数学模型；人们认为这样的设计方法很重要，因为很难在 工业体系。 (4)研究各种复杂分散控制设计方法。 提出了新的应用问题： 与新理论相结合，确定该理论在实际应用中有多好是非常有意义的。 世界问题，因此一些应用问题也将被研究，这些问题本身就很有趣。 (I)将为新一代硬盘驱动系统设计控制器，据信速度将快一个数量级 而不是现有的磁盘驱动器(美国加州圣何塞的西部数据公司、高级伺服机械技术公司对此感兴趣 新的控制器设计；注：似乎没有加拿大公司可供互动。) (2)大型通用电力管理系统和分散控制器 将实施包括多个分布式能源(DER)单元的微电网系统。这类问题很重要 在微电网系统中，这将是一个比以前的研究要求更高的数量级。 (Iii)将开展研制一种适用于脊髓损伤患者的控制器的问题。 (4)将研究第三代大型柔性空间结构(LFSS)的分散控制；特别是有必要 并给出了解存在的充分条件和控制器的特征。这一理论将在 将其应用于MSAT II LFSS。

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.