EE2253 CONTROL SYSTEMS(Common to EEE, EIE & ICE)
AIMTo provide sound knowledge in the basic concepts of linear control theory and design of control
OBJECTIVESi To understand the methods of representation of systems and to desire their transfer
ii To provide adequate knowledge in the time response of systems and steady state error
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
v To study the three ways of designing compensation for a control system.
UNIT I SYSTEMS AND THEIR REPRESENTATION 9Basic 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 9Time 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
UNIT III FREQUENCY RESPONSE 9Frequency 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 9Characteristics 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
UNIT V COMPENSATOR DESIGN 9Performance criteria – Lag, lead and lag-lead networks – Compensator design using bode plots.
L = 45 T = 15 TOTAL = 60 PERIODS
TEXT BOOKS1. I.J. Nagrath and M. Gopal, ‘Control Systems Engineering’, New Age International Publishers,
2. Benjamin C. Kuo, Automatic Control systems, Pearson Education, New Delhi, 2003.
REFERENCES1. 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.