Continuous Discrete Control Systems.pdf

Continuous Discrete Control Systems By Zhang ju zhangju@mail.hz.zj.cn, zjk@zjut.edu.cn 0571H) 0571O) (M) Institute of Automation, College of Information Engineering, Zhejiang University of Technology August 22, 2003 Chapter 1 Preliminaries 1.1 Why Control? Typical industrial application: motor control system. Response without control ; Possible responses with controls Purposes of control or the essential features of a good control system (qualitatively).: Speed of response, steady state error, and stability 1.2 Feedback, and Some Important Concepts Block Diagram and some important concepts Negative and positive feedback. Feedback control of a motor (Block diagram) Feedback of an antiaircraft gun (Block diagram) (Similar to the missile defense system, USA) (Golden age of the control in the century just past) History of the development control theory. Open loop system, closed-loop system, loop transfer function, closed-loop transfer function and their relationship. Time domain analysis, frequency-domain analysis and their relationship Modeling, analysis, simulation, design and their relationship. Continuous time control system, discrete time control system and their relationship. Linear, Nonlinear system and its relationship Linear Time Invariant System (LTI) and Linear Time Variant System, and some examples. 1.3 Scopes of Our Class The Laplace transform (chapter 2) The transfer function (chapter 3) Introducing the feedback (chapter 4) Time domain Techniques: Root locus analysis (chapter 5) Quantifying performance (chapter 6) Cascade root locus design (chapter 7) Frequency domain Techniques: Frequency response (chapter 9) Nyquist criterion (chapter 10) Bode design (chapter 11) Discrete time system: Discrete system (chapter 14) Digital control (if time permission) Chapter 2 The Laplace Transform 2.1 Overview