11-02-2015, 05:37 PM

Anna University , Chennai

Department of B.E-Electrical and Electronics Engg

Fourth Semester

EE2253 Control Systems

Units 1 , 2 and 3

Scanned Lecture Notes

(Regulation 2008)

Attachment : Click Here

Syllabus :

UNIT 1 : INTRODUCTION

UNIT 2 : TIME RESPONSE ANALYSIS

UNIT 3 : FREQUENCY RESPONSE

Content :

CONTROL SYSTEM

Classification of control system

1. Depends upon the structure

2. Depends upon the mathematical model

3. Depends upon the response

4. Depending upon the hardware components used

5. Depending upon the data type

6. Depending upon the method control used

7. Depending upon the no of variables

Open loop system

Closed loop system

Comparison of open and closed loop

Modelling of the system

1. State space model

2. Impulse response model

Transfer function

Properties of transfer function

Poles of a function

Zero’s of the function

Characteristics equation of the system

Order of the function

Electrical analogy of mechanical system

Classification

1. Mechanical transulation system

2. Mechanical rotational system

Mechanical translation system

a. Mass

b. Spring

c. Dash pot

Concept of force

Transulation system

Mechanical rotational system

Electrical analogy of mechanical translational system

Force voltage analogy

Block diagram representation

Properties

Block diagram reduction algebra

SIGNAL FLOW GRAPH

Path

Input node

Path gain

Signal flow graph reduction

Mason’s gain formula

Procedure

Synchros

Sychro transmitter

Construction

Major parts

1. Stator

2. Rotor

Synchro’s control transformer

DC servomotor

Permanent magnet motor

Advantages

Disadvantages

Electro-magnetic field motor

AC servomotor

Working principle

UNIT-2

TIME RESPONSE ANALYSIS

Transient steady state

Closed loop transfer function

Test signal

1. Step signal

2. Ramp signal

3. Parabolic signal

4. Impulse signal

Order of the system

Types of the system

Time response of the second order system

Time domain specification

1. Delay time

2. Rise time

3. Peak time

4. Peak over shoot

5. Setting time

Type number of control system

Steady state error

Generalized error co-eficient

Evaluation of generalized error co-efficient

P , PI , PID modes of feed back controller

Error compensation

Effects of PI controller

Loop transfer function

Effects of PID controller

UNIT-3

FREQUENCY RESPONSE

Advantages of frequency response method

Graphical methods

Bode plot

Nyquist plot

Nichols chart

Frequency response

Frequency domain specification

1. Resonant peak

2. Resonant frequency

3. Band width

4. Cut off rate

5. Gain margin

6. Phase margin

Basic factors

1. Consant gain

2. Integral factor

3. Derivative factor

4. First order factor in denominator

Steps for plotting the magnitude plot

Procedure for phase plot of bode plot

Typical sketch of polar plots

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