Lecture Control system design: Introduction - Nguyễn Công Phương

Nguyễn Công Phương

CONTROL SYSTEM DESIGN


Contents
I. Introduction
II. Mathematical Models of Systems
III. State Variable Models
IV. Feedback Control System Characteristics
V. The Performance of Feedback Control Systems
VI. The Stability of Linear Feedback Systems
VII. The Root Locus Method
VIII.Frequency Response Methods
IX. Stability in the Frequency Domain
X. The Design of Feedback Control Systems
XI. The Design of State Variable Feedback Systems
XII. Robust Control Systems
XIII.Digital Control Systems
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References
[1] R. C. Dorf, R. H. Bishop. Modern Control
Systems. Prentice Hall, 2011.
[2] N. S. Nise. Control System Engineering. Wiley,
2011.
[3] W. S. Levine. Control System Fundamentals.
CRC Press, 2010.

[4] J. J. D’Azzo, C. H. Houpis, S. N. Sheldon.
Linear Control System Analysis and Design with
Matlab. Marcel Dekker, 2003.
[5] G. C. Goodwin, S. F. Graebe, M. E. Salgado.
Control System Design. Prentice – Hall, 2000.
[6] sites.google.com/site/ncpdhbkhn
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Introduction (1)
• Control system: an interconnection of
components forming a system configuration
that will provide a desired system response.

Input

Process

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Output

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Introduction (2)
Process

Input

Desired output
response

Controller

Actuator

Output

Process

Output

Open – loop control system (without feedback)

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Introduction (3)
Input

Desired output
response

Error
(–)

Process

Controller

Measurement output

Output

Actuator
Sensor

Process

Actual
output

Feedback

Closed – loop control system (with feedback)

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Introduction (4)
Process

Input

Desired
output
response

Output

Disturbance
Error
(–)

Controller

Measurement output

Actuator

Sensor

Process

Actual
output
Measurement
noise

Feedback

Closed – loop control system with external disturbances & measurement noise

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Introduction (5)
Input

Desired output
response
Error

Controller #2

(–)
Outer
loop

Process

Error
(–)

Output

Actual
output

Controller #1

Actuator

Process

Inner
loop
Measurement output

Measurement output

Sensor #1

Sensor #2

Feedback

Feedback

Multiloop feedback control system with an inner loop & an outer loop

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Introduction (6)
Process

Input

Desired output
response

Comparison

Output

Actual
output

Error

Controller

Actuator

Process

Sensor
Measurement output

Feedback

Multivariable control system

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Introduction (7)

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Introduction (8)

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Introduction (9)
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Desired direction
of travel
Actual direction of travel
Desired course
of travel
Error
(–)

Driver

Steering
mechanism

Actual course
of travel

Motorbike

Measurement & vision
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Introduction (10)

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Desired
temperature

Error
(–)

Controller

Cooling
system

Room

Actual

temperature

Temperature measurement
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Introduction (11)

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