JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Mathematical Model For Physical Systems - Open loop – closed loop control – Differential equations of physical systems – Transfer functions – Block diagram algebra – Signal flow graphs - Reduction using Mason’s gain formula. Industrial Automatic Controls - Classification – Proportional derivative and integral control actions – Liquid level control systems with proportional and integral control – Pneumatic, hydraulic and electronic controllers

UNIT - II

Transient Response Analysis - Standard signals – transient response of first and second order systems – Steady state errors and error constants.

UNIT - III

Transfer Function Representation: Transfer function of DC servomotor – AC servomotor – Synchronous transmitter and receiver. Block diagram representation of systems – Representation by signal flow graph.

UNIT - IV

Stability Analysis: Concepts of Stability - Necessary conditions for stability – Hurwitz stability criterion – Routh’s stability criterion – Relative stability. Frequency Response Analysis - The root locus concept – Frequency response, polar plot, Bode plot – Nyquist stability criterion.

UNIT - V

State Variable Model and Analysis - Concepts of state & state variables – Derivation of state models from Block diagrams - State space representation of systems – Transfer matrix - Solution of state equation – State transition matrix – Concepts of controllability and observability.

REFERENCE BOOKS

• 1. Control systems, Principles and Design / M Gopal / TMH
• 2. Modern Control Engineering/ K.Ogata / Prentice Hall
• 3. Control Systems /Anand Kumar / Prentice Hall
• 4. Control Systems Engineering /Nagrath & M. Gopal/ Wiley Eastern
• 5. Automatic control systems/ B.C.Kuo/John Wiley & Sons\ Modern Control Systems/ Richard C.Dorf and Robert H. Bishop