Feedback Control Systems ( FCS ). Lecture1 & 2 Introduction to the Subject. Dr. Imtiaz Hussain email: [email protected] URL : http://imtiazhussainkalwar.weebly.com/. Course Outline. Text Books. Modern Control Engineering, (5 th Edition) By: Katsuhiko Ogata.
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Lecture1 & 2
Introduction to the Subject
Dr. Imtiaz Hussain
email: [email protected]
URL :http://imtiazhussainkalwar.weebly.com/
Modern Control Engineering, (5th Edition)
By: Katsuhiko Ogata.
(Prof Emeritus)
Mechanical Engineering
University of Minnesota
Control Systems Engineering, (6th Edition)
By: Norman S. Nise. (Professor Emeritus)
Electrical and Computer Engineering Department
at California State Polytechnic University
Modern Control Systems, (12th Edition)
By: Richard C. Dorf and Robert H. Bishop.
2. Automatic Control Systems, (9th Edition)
By: Golnaraghi and B. C. Kuo.
System – An interconnection of elements and devices for a desired purpose.
Control System – An interconnection of components forming a system configuration that will provide a desired response.
Process – The device, plant, or system under control. The input and output relationship represents the causeandeffect relationship of the process.
Process
Input
Output
Controlled Variable– It is the quantity or condition that is measured and Controlled. Normally controlled variable is the output of the control system.
Manipulated Variable– It is the quantity of the condition that is varied by the controller so as to affect the value of controlled variable.
Control– Control means measuring the value of controlled variable of the system and applying the manipulated variable to the system to correct or limit the deviation of the measured value from a desired value.
Manipulated Variable
Input
or
Set point
or
reference
Controller
Process
Output
Or
Controlled Variable
OpenLoop Control Systems
Controller
Process
Input
Output
Examples: Washing Machine, Toaster, Electric Fan
OpenLoop Control Systems
ClosedLoop Control Systems
ClosedLoop Control Systems utilizes feedback to compare the actual output to the desired output response.
Controller
Process
Input
Output
Comparator
Measurement
Examples: Refrigerator, Iron
Multivariable Control System
Controller
Process
Outputs
Temp
Comparator
Humidity
Pressure
Measurements
Feedback Control System
Controller
Process
error
Input
+
Output

Feedback
Servo System
Antenna Positioning System
Modular Servo System (MS150)
Linear Vs Nonlinear Control System
Process
u(t)
y(t)
Linear Vs Nonlinear Control System
Linear Vs Nonlinear Control System
Linear Vs Nonlinear Control System
°C
Temperature
500°C
Valve Position
0%
25%
100%
% Open
Time invariant vs Time variant
Lumped parameter vs Distributed Parameter
Continuous Data Vs Discrete Data System
x(t)
t
X[n]
n
Deterministic vs Stochastic Control System
x(t)
y(t)
t
t
z(t)
t
Control Systems
Natural
Manmade
Automatic
Manual
LTI Control Systems(Linear time invariant control systems)
Openloop
Closedloop
linear
Nonlinear
Nonlinear
linear
Time variant
Time invariant
Time invariant
Time variant
Waterlevel float regulator
Examples of Control Systems