ELECTRICAL ENGINEERING DEPARTMENT
EJ502-CONTROL SYSTEM
PRACTICAL WORK 5
Name:
Reg. No:
Group
& Class:
TITLE
: ANALYSIS STABILITY SYSTEM (POLAR /NYQUIST PLOT
METHOD)
CLO 2
: Work efficiently with proper technique and procedure while handling
the related pr

POLAR AND
NYQUIST
PLOT
Chapter 3
by: Mohd Nordin Mohd Jani
General Overview
A major disadvantage of Bode Plot is that we
have to separate curves showing the variation of
the gain and phase shift with frequency.
Meaning that bode diagram uses two plots to

ELECTRICAL ENGINEERING DEPARTMENT
EJ502-CONTROL SYSTEM
PRACTICAL WORK 3
Name:
Reg. No:
Group
& Class:
TITLE
CLO 2
: ROUTH-HURWITZS METHOD
: Work efficiently with proper technique and procedure while handling
the related process equipment in control system

STABILITY & FREQUENCY
RESPONSE
tability Analysis
oles of M(s) will give a stability to this system.
his poles can be obtained by solving the characteristic
equation below :
1 + G(s)H(s) = 0
he roots of characteristic equation gives poles M(s),
r(t) = t

Bode Plot Method
Chapter 2
Mohd Nordin Mohd Jani
Bode Plot
Magnitude Plot
Phase Angle Plot
Use logarithmic scales semilog graph paper
Consist of Factors
Factor 1 : System gain K
G(s)H(s) = K
G(j)H(j) = K + j0
dB value = 20K d
Phase Plot -
Phase
dB
Fa

STABILITY ANALYSIS OF
SYSTEM (BODE PLOT
METHOD)
Chapter 2
By : Mohd Nordin Mohd Jani
JKE PMK
Introduction
Bode Plot
Magnitude Plot
Phase Angle Plot
Use logarithmic scales semilog graph paper
2 plots both have logarithm of frequency on x-axis
y-axis

Concept of Stability
Figure 2.1
Consider a system i.e. a deep container with an object placed inside it as shown Fig 2.1.
Now if we apply a force to take out the object, as the depth of container is more, it will
oscillate and will settle down again at o

*ANALOG
CONTROLLER
CHAPTER 1
By Mohd Nordin Mohd Jani
JKE PMK
*PRINCIPLES OF CONTROLLER
* A controller is a device that generates an
output signal based on the input signal it
receives.
* The
input signal is actually an error signal,
which is the differen

ELECTRICAL ENGINEERING DEPARTMENT
EJ502 CONTROL SYSTEM
ESSAY QUESTION
NAME :
ID. NO :
DURATION:
MARKS:
INSTRUCTIONS: ANSWER ALL QUESTIONS
CLO 1 : Apply knowledge of control system fundamental in solving a various engineering problem
based on appropriate m

Introduction To Control Systems
EJ502 Control System
Department of Electrical Eng.
Politeknik Melaka
By Mohd Nordin Mohd Jani
2
Introduction
An
interdisciplinary field covering many areas
of engineering and sciences.
Also exist in many systems of engine

Chapter 2
STABILITY OF A
SYSTEM
Mohd Nordin Mohd Jani
Department of Electrical, PMK
Stability
When a system is unstable, the output of the
system may be infinite even though the input
to the system was finite.
This cause a number of practical problems.
Fo

PID Controller Tuning
Chapter 1
By Mohd Nordin Mohd Jani
Jke Pmk
Know basic tuning of PID controller able
to :
1.
Relate PID controller parameters to
step response
characteristics of the controlled
system, and
2. Apply the famous Ziegler-Nichols tuning
me