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.
TIME RESPONSE
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.
FREQUENCY RESPONSE
Frequency response – Bode plot – Polar plot – Determination of closed loop
response from open loop response – Correlation between frequency domain and
time domain specifications.
STABILITY OF CONTROL SYSTEM
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.
COMPENSATOR DESIGN
Performance criteria – Lag, lead and lag-lead networks – Compensator design
using bode plots.
REFERENCE
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.
Reference Books
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.
