Introduction : Open-loop and closed-loop systems, servomechanisms and regulator systems; Transfer function; Block diagram reduction; Signal flow graphs.
Mathematical models of Physical Systems: Mechanical translational and rotational systems, gear trains; D.C. generator and motor; Transportation Lag Systems. Components of feedback control systems: Potentiometers as error sensing devices, synchros, a.c. servo motor; tachometers.
Stability: Concept of stability, necessary and sufficient conditions of stability; Closed-loop systems, merits and demerits; Routh Hurwitz Criterion.
Transient Response: Typical inputs, convolution integral; Time domain specifications, steady state errors.
Frequency Response: Definition, equivalence between transient response and frequency response; Bode plots.
Nyquist stability criterion: Development of the criterion; Gain and phase margins; M circles and Nichol's chart.
Root Locus method: Rules for sketching of root loci; Root contours.
State space representation of control systems.
Synthesis: Lag and lead network; Proportional, derivative and Integral controllers.
1. "Control Systems Engineering" by I.J. Nagrath & M. Gopal, end Edn. Wiley Eastern, New Delhi. 2. "Automatic Control Systems" by B.C. Kuo, 4th Edn. Prentice Hall of India, New Delhi. 3. "Control System Engineering" by Norman S. Nise, Wiley Text Books.
1. "Modern Control Engineering" by Ogata K. 4th Edn. Prentice Hall. 2. "Modern Control Systems Theory" by M. Gopal, John Wiley & Sons, Inc.