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Prof' Sharanabasava C Pilli Principal, KLE Societys

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Raven, F., Automatic Control Systems, 5th Edition, McGraw Hill, 1995. REFERENCE BOOKS : ... Gopal, M., Control Systems Principles and Design, Tata McGraw Hill, 1997. ... – PowerPoint PPT presentation

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Title: Prof' Sharanabasava C Pilli Principal, KLE Societys


1
ME55 CONTROL ENGINEERING
Prof. Sharanabasava C PilliPrincipal, KLE
Societys College of Engineering and Technology,
Udyambag, Belgaum-590008Email
scpilli_at_yahoo.co.in
2
ME55 CONTROL ENGINEERING
Other Subject Experts Prof. B. K. Sridhar, NIE,
Mysore Prof. D. V. Girish, MCE, Hassan Prof. R.
Sreenidhi, SJCE, Mysore
3
COURSE CONTENT
  • Introduction
  • Mathematical Model
  • System Response
  • Block Diagram
  • Control Action
  • Frequency Response
  • Logarithmic plots / Bode Plots
  • Root Locus Plots
  • System Compensation
  • State Variable Characteristics of Linear System

4
TEXT/ REFERENCE BOOKS
  • TEXT BOOKS
  • Ogatta, K., Modern Control Engineering, Prentice
    Hall, India, 2003.
  • Raven, F., Automatic Control Systems, 5th
    Edition, McGraw Hill, 1995.
  • REFERENCE BOOKS
  • Stefano III, J. J., Stubbered, A. R., Williams,
    I. J., Theory and Problems of Feedback and
    Control Systems, Schaums Outline Series, 2001.
  • Nagrath, I. J., and Gopal, M., Control Systems
    Engineering, Wiley Eastern Ltd.
  • Gopal, M., Control Systems Principles and Design,
    Tata McGraw Hill, 1997.
  • Sivanandom, S. N., Control Systems Engineering,
    Vikas Publishing House, 2001.
  • Dorf, R. C., and Bishop, R. H., Modern Control
    Systems, Addison-Wesely, 1998.
  • Kuo, B. C., Automatic Control Systems, Prentice
    Hall (India), 1995.
  • Eronini, E. U., System Dynamics and Control,
    Thomson Learning,1999.

5
INTRODUCTION
regulate, direct or command
Control Engineering
primarily the application of a certain body of
knowledge, a set of skills, and point of view, in
the creation of devices, structures and process
to transform resources to forms which satisfy the
needs of society
System Arrangement of physical components
connected or related in such a manner as to form
and/or act as an entire unit
6
TYPES OF CONTROL SYSTEMS
  • Man made electric switch
  • Natural/ biological pointing a finger at an
    object.
  • Hybrid driving an automobile

7
EXAMPLES
Man Made System An electric switch controlling
flow of electricity. input flipping the
switch on/off system electric switch
output flow or no flow of current
8
EXAMPLES
Biological System Pointing a finger at an
object. input direction of the object wrt to
some direction system eyes, arm, hand, finger
and brain of a man output actual pointed
direction wrt same direction
9
EXAMPLES
Man driving an automobile input direction or
lane system drivers hand, eyes, brain,
vehicle output heading of the automobile
10
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11
ANALYSIS
Differential Equations
Laplace Transform
Transform
Classical solution
Initial Conditions
Inverse Laplace Transform
Revised Transform
Solution
Time domain
Frequency domain
12
LAPLACE TRANSFORMATION
Transforming the function f(t) from time domain
(t) into complex function of complex operator (s)
is known as Laplace transformation.
  • Advantages
  • Graphical methods can be used for prediction.
  • Transient steady state solutions obtained
    simultaneously

13
CLASSIFICATION OF CONTROL SYSTEMS
based upon the control action which is
responsible to activate the system to produce
the output
  • Open loop control system in which the control
    action is independent of the out put.
  • Closed loop control system in which the control
    action is some how dependent upon the output and
    are generally called as feedback control systems.

14
OPEN LOOP CONTROL SYSTEM
Washing clothes in a washing machine Soaking,
washing and rinsing - operate on a time basis.
Output signal, the cleanliness of the clothes is
not measured nor feedback for comparison with
the input.
15
CLOSED LOOP CONTROL SYSTEM
Room temperature control system Input reference
temperature, Output- actual
temperature Feedback elements measure the actual
room temperature Controller compares the actual
and reference temperature operate thermostat to
on/off position
16
CHARACTERISTICS
  • Open loop
  • Simple,
  • Less expensive,
  • Accuracy depends on calibration
  • Stable
  • Closed loop
  • More expensive and complex,
  • Increased accuracy, and reduced distortion,
  • Reduced sensitivity,
  • Increased band width,
  • Tendency to oscillate

17
RECAP
  • What is control system?
  • Types of control systems.
  • Overview of analysis.
  • Classification of control systems
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