Unit

Details of the Unit

No.of Teaching Hours

Reference Book No.s

1.

Introduction:Concepts of Control Systems - Open Loop and closed loop control systems and their differences - Different examples of control systems - Clasification of control systems. Mathematical Models of Physical Systems Differentical equations - transfer functions and block diagram representation of systems considering electrical systems as examples Block diagram algebra -Representation by Signal flow graph - reduction using Mason’s gain formula - translational and rotational mechanical systems.

12

1,2,3,5

2.

Feed-Back Characteristics: What is Feedback? Effects of feedback - reduction of parameter variations by use of feedback-Control over system dynamics - by the use of feedback. Elements of Control Systems : DC Servo motor - AC Servo motor - Synchro transmitter and Receiver

12

1,2,3,5

3.

Time Response Analysis: Standard test signals - Time response of first order systems - Characteristic Equation of Feedback control systems, Transient response of second order systems - Time domain specifications - Steady state response - Steady state errors and error constant - Effects of proportional derivative, proportional integral systems. Concepts of stability: The concept of stability, Routh stability criterion - qualitative stability and conditional stability.

12

1,2,3,5

4.

Root Locus Technique :The root locus concept - construction of root locii - effect of adding poles and zeros to G(s)H(s) on the root locii Frequency Response Analysis:Introduction, Frequency domain specifications - Bode diagrams - Determination of Frequency domain specifications and transfer function from the Bode Diagram - Phase margin and Gain margin - Stability Analysis from Bode Plots. Polar Plots, Nyquist Plots and applications of Nyquist stability criterion

12

1,2,3,4,5

5.

Design and Compensation Technique:Introduction and Preliminary design considerations - Lead, Lag, Lead-lag - compensation Based on frequency response approach. PID controller State Space Analysis of Continuous Systems :Concepts of state, state variables and state model, derivation of state models from block diagrams, Diagonalization - Solving the Time Invariant state Equations - State Transition Matrix

12

1,2,3,4,5