The Macroscopic Theory of Process Control

在系统工程、计算机科学和数学物理中，人们对复杂性、全局系统结构和宏观分析的研究感兴趣。这是非线性动力系统研究取得进展的结果。这种兴趣也可能受到工业和社会需求的推动——面对不断变化的环境和巨大的不确定性，必须对大型系统进行建模和控制。系统之间的互连变得越来越复杂，决策过程也变得一体化。本研究的目的是发展过程控制的宏观理论。热力学第一定律将用于开发过程的简化描述。第二定律将提供耗散机制，李亚普诺夫分析将用于建立稳定控制存在的充分条件。该理论在远离平衡态的情况下是有效的，可以广泛地应用于非稳态控制问题。本文将推导出一种有效的控制系统设计方法。该方法可用于决定应该测量和操纵哪些变量，如何使用非线性测量组合以及设备和平衡约束如何限制控制系统的性能。这一理论将适用于两个系统。首先，微观可逆性的概念将用于发展一个完整的理论，以控制单阶段，充分混合的过程。其次，这将推广到有几个混合良好的阶段的过程。U} c；人们对这项研究很感兴趣​!!!!F V V R乘以象征“Helvetica芝加哥Tms Rmn Helv脚本1快递B P伦敦P雅典旧金山洛杉矶Palatino开罗@移动,Arial狭窄书安迪瓜书商老式,世纪哥特式5快递新的F单型Corsiva单型各样世纪教科书喝酒聚会太多余的苹果LaserWriter II NT LPT3:pscript苹果激光写真机II NT $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

Abstract - Ydstie - 9316572 In systems engineering, computer science and mathematical physics, there is interest in the study of complexity, global system structures and macroscopic analysis. This is a consequence of advances made in the stury of nonlinear dynamic systems. The interest can also be motivated by industrial and societal needs - large systems must be modelled and controlled in the face of a changing environment and significant uncertainty. Interconnections between systems become increasingly complicated and the decision making processes are integrated. The aim of this research is to develop a macroscopic theory for process control. The first law of thermodynamics will be used to develop a reduced complexity description of the process. The second law will provide a mechanism for dissipation, and Lyapunov analysis will be applied to establish sufficient conditions for the existence of stabilizing controls. This theory is valid far from equilibrium and it can be applied to a wide range of unsteady state control problems. A constructive method for control system design will be derived. The method can be used to decide which variables should be measured and manipulated, how nonlinear combinations of measurements can be used and how equipment and equilibrium constraints limit the control system performance. The theory will be applied to two systems. First, the idea of microscopic reversiblity will be used to develop a complete theory for the control of single stage, well mixed processes. Second, this will be generalized to processes with several well mixed stages. u } cs, there is int erest in the study ! ! ! ! F V V R Times Symbol " Helvetica Chicago Tms Rmn " Helv 1 Courier B Script P London P Athens P San Francisco Cairo @ LosAngeles Palatino Mobile & Arial Narrow Book Antiqua Bookman Old Style & Century Gothic 5 Courier New F Monotype Corsiva Monotype Sorts Century Schoolbook Wingdings MT Extra Apple LaserWriter II NT LPT3: pscript Apple LaserWriter II NT U D o d , X Z e * @ @ @ " h \ E \ E O A ydstiabs93 Nichelle T. Coward Nichelle T. Coward