The Principle of Automatic Control 自动控制原理.ppt

The Principle of Automatic Control 自动控制原理 ;References (参考教材）;Significance（课程意义）;Bilingual Course（双语课程） ;The Excitement of Control Engineering;Control is a multidisciplinary subject;Ch1 Introduction to Control system;Basic Requirements (Performance) Classification of Control System Examples of Modern Control System Simulation with MATLAB(CSCAD);1.1 Basic Concept of Control System; Open-loop Control System An open-loop Control System utilizes an actuating device to control the process directly without using feedback. as shown in Fig.1.2(page 2) Closed-loop Control System A closed-loop control system uses a measurement of the output and feedback of this signal to compare it with the desired output(reference or command). as shown in Fig.1.3(page 3) ;1.2 History and Development of Automatic Control;H.W.Bode analyzes feedback amplifiers at Bell Telephone Lab in 1927 auto-pilots, gun-positioning systems,radar antenna control system and other military systems in World War II State-variable models and optimal control developed in 1960’s-1970’s (space age) Robust control widely studied in 1980’s Intelligent control etc.; ;1.3 The Principle of Feedback Control;1.4 Basic Forms of Control System;1.5 Basic Components of Closed-loop system;1.6 Basic Requirements (Performance); 1.7 Classification of Control System; 1.8 Examples of Modern Control System;1.9 Simulation with MATLAB(CSCAD);系统仿真：广义上讲，为了系统的分析和设计，首先建立系统的模型，然后在模型上进行实验这一过程就称为系统仿真。根据模型的种类不同，系统仿真可分为三种： 物理仿真（实物，如飞机风洞实验）真实直观；投资大、周期长，试验受限制 数字仿真（基于系统数学模型的仿真）经济、方便、灵活；真实性要依赖模型 物理数学仿真（半实物仿真，如飞机、导弹等运动体的转台实验） ; 本课程涉及的是数字仿真（或称计算机仿真），仿真应包含两个过程：建立模型及模型试验。计算机仿真包含三要素：系统、模型与计算机；与之相联系的三个基本活动：模型建立、仿真模型建立及仿真试验。它们之间的关系可由图表示： 系 统 模型建立 仿真实验 仿真模型建立 模 型