**ANNA UNIVERSITY, CHENNAI**

**A**

**FFILIATED INSTITUTIONS**

**R - 2008**

**B**

**.**

**E**

**. ELECTRICAL AND ELECTRONICS ENGINEERING**

E2253 |
CONTROL
SYSTEMS |

**AIM**

To provide sound knowledge in the basic concepts of linear control theory and design of control system.

OBJECTIVES

i To understand the methods of representation of systems and to desire their transfer function models.

ii To provide adequate knowledge in the time response of systems and steady state error analysis.

iii To accord basic knowledge in obtaining the open loop and closed–loop frequency responses of systems.

iv To understand the concept of stability of control system and methods of stability

analysis.

v To study the three ways of designing compensation for a control system.

UNIT I SYSTEMS AND THEIR REPRESENTATION 9

Basic elements in control systems – Open and closed loop systems – Electrical analogy of mechanical and thermal systems – Transfer function – Synchros – AC and DC servomotors – Block diagram reduction techniques – Signal flow graphs.

UNIT II TIME RESPONSE 9

Time response – Time domain specifications – Types of test input – I and II order system response – Error coefficients – Generalized error series – Steady state error – P, PI, PID modes of feed back control.

UNIT III FREQUENCY RESPONSE 9

Frequency response – Bode plot – Polar plot – Determination of closed loop response from open loop response – Correlation between frequency domain and time domain specifications.

UNIT IV STABILITY OF CONTROL SYSTEM 9

Characteristics equation – Location of roots in S plane for stability – Routh Hurwitz criterion – Root locus construction – Effect of pole, zero addition – Gain margin and phase margin – Nyquist stability criterion.

UNIT V COMPENSATOR DESIGN 9

Performance criteria – Lag, lead and lag-lead networks – Compensator design using bode plots.

To provide sound knowledge in the basic concepts of linear control theory and design of control system.

OBJECTIVES

i To understand the methods of representation of systems and to desire their transfer function models.

ii To provide adequate knowledge in the time response of systems and steady state error analysis.

iii To accord basic knowledge in obtaining the open loop and closed–loop frequency responses of systems.

iv To understand the concept of stability of control system and methods of stability

analysis.

v To study the three ways of designing compensation for a control system.

UNIT I SYSTEMS AND THEIR REPRESENTATION 9

Basic elements in control systems – Open and closed loop systems – Electrical analogy of mechanical and thermal systems – Transfer function – Synchros – AC and DC servomotors – Block diagram reduction techniques – Signal flow graphs.

UNIT II TIME RESPONSE 9

Time response – Time domain specifications – Types of test input – I and II order system response – Error coefficients – Generalized error series – Steady state error – P, PI, PID modes of feed back control.

UNIT III FREQUENCY RESPONSE 9

Frequency response – Bode plot – Polar plot – Determination of closed loop response from open loop response – Correlation between frequency domain and time domain specifications.

UNIT IV STABILITY OF CONTROL SYSTEM 9

Characteristics equation – Location of roots in S plane for stability – Routh Hurwitz criterion – Root locus construction – Effect of pole, zero addition – Gain margin and phase margin – Nyquist stability criterion.

UNIT V COMPENSATOR DESIGN 9

Performance criteria – Lag, lead and lag-lead networks – Compensator design using bode plots.

**L = 45 T = 15 TOTAL = 60 PERIODS**

1. I.J. Nagrath and M. Gopal, ‘Control Systems Engineering’, New Age International Publishers, 2003.

2. Benjamin C. Kuo, Automatic Control systems, Pearson Education, New Delhi, 2003.

REFERENCES

1. K. Ogata, ‘Modern Control Engineering’, 4th edition, PHI, New Delhi, 2002.

2. Norman S. Nise, Control Systems Engineering, 4th Edition, John Wiley, New Delhi, 2007.

3. Samarajit Ghosh, Control systems, Pearson Education, New Delhi, 2004

4. M. Gopal, ‘Control Systems, Principles and Design’, Tata McGraw Hill, New Delhi, 2002.

TEXT BOOKS

1. I.J. Nagrath and M. Gopal, ‘Control Systems Engineering’, New Age International Publishers, 2003.

2. Benjamin C. Kuo, Automatic Control systems, Pearson Education, New Delhi, 2003.

REFERENCES

1. K. Ogata, ‘Modern Control Engineering’, 4th edition, PHI, New Delhi, 2002.

2. Norman S. Nise, Control Systems Engineering, 4th Edition, John Wiley, New Delhi, 2007.

3. Samarajit Ghosh, Control systems, Pearson Education, New Delhi, 2004

4. M. Gopal, ‘Control Systems, Principles and Design’, Tata McGraw Hill, New Delhi, 2002.

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