Lecture "Fundamentals of control systems - Chapter 1: Introduction" presentation of content: What is control system, control principle, components off control systems, examples of control systems, review of complex variables and Laplace transform.
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Nội dung Text: Lecture Fundamentals of control systems: Chapter 1 - TS. Huỳnh Thái Hoàng
- Lecture Notes
Fundamentals of Control Systems
Instructor: Assoc. Prof. Dr. Huynh Thai Hoang
Department of Automatic Control
Faculty of Electrical & Electronics Engineering
Ho Chi Minh City University of Technology
Email: hthoang@hcmut.edu.vn
huynhthaihoang@yahoo.com
Homepage: www4.hcmut.edu.vn/~hthoang/
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 1
- Course objectives
This course iis about
Thi b the
h analysis
l i anddddesign
i off
control systems with emphasis on modeling, state
variable representation
representation, computer solutions
solutions,
modern design principles.
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 2
- Course outline
Ch t 1:
Chapter 1 Introduction
I t d ti
Chapter 2: Mathematical model of continuous systems
Chapter 3: System dynamics
Chapter 4: Analysis of system stability
Chapter 5: Performances of control systems
Chapter 6: Design of control systems
Chapter 7: Mathematical model of continuous systems
Chapter 8: Analysis of discrete control systems
Chapter 9: Design of discrete control systems
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 3
- Textbook
Textbook:
T tb k Katsuhiko
K t hik Otaga,
Ot M d
Modern C t l Engineering,
Control E i i
3rd ed., Prentice Hall
Reference:
Franklin, Powell, and Emami-Naeini, Feedback Control
of Dynamic Systems,
Systems 6th ed.,
ed Prentice Hall,
Hall 2009
Farid Golnaraghi and Benjamin C. Kuo, Automatic
Control Systems, 9th ed., 2009, Prentice Hall.
Richard
Ri h d C.C Dorf
D f andd Robert
R b t H.
H Bishop,
Bi h M d
Modern C t l
Control
Systems, 11th ed, Peason.
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 4
- Grading
Class participation:
Cl ti i ti 10%
Homework: 20%
Midterm exam: 20%
Project presentation: 20%
Final exam: 30%
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 5
- How to learn the course???
( ) After 2 weeks we
(*)
tend to remember…
10% of what we read Reading
20% of what we hear Hearing words
30% of what we see Looking at pictures
Watching a movie
50% of what we Looking at an exhibit
see and hear Watching a demostration PASSIVE
Seeing
S i it ddone on llocation
ti
70% of what Participating in a discussion
we say ACTIVE
Given a talk
90% of what Doing a dramatic presentation
we say Simulating the real experience
and do Doing the real thing
(*) Edgar Dale, “Audio-Visual Methods in Teching,” Holt, Rinehart and Winston
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 6
- Chapter
p 1
INTRODUCTION
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 9
- Topics
Whatt is
Wh i control
t l system?
t ?
Control principles
Components of control systems
Examples of control systems
Review
e e o of co
complex
p e variables
a ab es a
and
d Laplace
ap ace ttransform
a so
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 10
- What is control system?
?
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 11
- Exercise
Find examples of control systems?
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 12
- Exercise
Explain how a control system works?
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 13
- Example of a control process
Objective is to keep moving at constant speed.
Activities in controlling the car:
1 reading
1. di velocimeter
l i t
2. deciding to increase or decrease speed
3. actingg on the g
gas ppedal
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 14
- Definition of control concept
Control
C t l is
i the
th process off getting
tti i f
information,
ti
processing information and making decision, and
acting
ti on a system
t so that
th t the
th system
t reponses as
desired.
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 15
- Control loop
Desired
speed Car speed
+_
Measured
speed
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 16
- Components of a control system
R(s) E(s) Y(s)
+_ C(s) G(s)
H(s)
Yfb(s)
Notation:
C(s): controller R(s): setpoint
G( ) plant
G(s): l t Y( ) controlled
Y(s): t ll d output
t t
H(s): sensor Yfb(s): feedback signal
E( ) control
E(s): t l error
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 17
- A simple level control system
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 18
- Level control system in industry
LC
LV
LT
Liquid tank
LC: Level Controller
LT: Level Transmitter
LV Level
LV: L l valve
l
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 19
- Speed control of steam engine
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- Why control?
I
Increase productivity
d ti it
Increase quality
Increase economic benefit
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 21
- Plants
Very diverse
Class of systems:
Electrical
Mechanical
Thermal
Th l
Fluid
Chemistry
Ch i t
Real systems consist of different kind of basic systems.
6 December 2013 © H. T. Hoang - www4.hcmut.edu.vn/~hthoang/ 22
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