Instructor: Chen-Hsiung Yang Dynamic System Modeling Analysis and Control 動態系統建模分析與控制 Lecture1 Introduction to System Dynamics.

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Instructor: Chen-Hsiung Yang Dynamic System Modeling Analysis and Control 動態系統建模分析與控制 Lecture1 Introduction to System Dynamics

Outline 1-1. Introduction 1-2. Mathematical Modeling of Dynamic Systems 1-3. Analysis and Design of Dynamic Systems 1-4. Summary

Introduction  Systems  A system is a combination of components acting together to perform a specific objective.  A component is a single functioning unit of a system.  Dynamic  if its present output depends on past input; if its current output depends only on current input, the system is known as static.

Introduction(Cont.)  Linear and nonlinear differential equations.  linear, time-invariant differential equation  linear, time-varying differential equation  A differential equation is called nonlinear if it is not linear.

Introduction(Cont.)  Continuous-time systems and discrete-time systems  Continuous-time systems are systems in which the signals involved are continuous in time.

Mathematical Modeling of Dynamic Systems  Mathematical modeling.  Mathematical modeling involves descriptions of important system characteristics by sets of equations.  By applying physical laws to a specific system, it may be possible to develop a mathematical model that describes the dynamics of the system.

Mathematical Modeling of Dynamic Systems(Cont.)  Mathematical modeling procedure. 1. Draw a schematic diagram of the system, and define variables. 2. Using physical laws, write equations for each component, combine them according to the system diagram, and obtain a mathematical model. 3. To verify the validity of the model, its predicted performance, obtained by solving the equations of the model, is compared with experimental results.

Analysis and Design of Dynamic Systems  Analysis.  Means the investigation, under specified conditions, of the performance of a system whose mathematical model is known.  Design.  Refers to the process of finding a system that accomplishes a given task. In general, the design procedure is not straightforward and will require trial and error.  Synthesis.  Using of an explicit procedure to find a system that will perform in a specified way.

Summary  The objective of this book is to enable the reader 1. To build mathematical models that closely represent behaviors of physical systems 2. To develop system responses to various inputs so that we can effectively analyze and design dynamic systems.