EELE605T CONTROL SYSTEM - I

UNIT-1
Introduction to need for automation and automatic control. Use of feedback, broad spectrum of system application.
Mathematical modeling (Electrical & Electromechanical) differential Equation, Transfer functions, block diagram,
signal flow graph. 10Hrs
UNIT-2
Effect of feedback on parameter variations, disturbance signal, Control system components electrical,
electromechanical, their functional analysis and input output representation. Servomechanism. 8Hrs
UNIT-3:
Time response of system, standard inputs, first order and second order system, concept of gain and time constant.
Steady state error, type of control system, approximate methods for higher order system, PD, PI, PID controllers.
8Hrs

UNIT-4:
Stability of control systems, condition of stability, characteristics equation, Routh Hurwitz criterion, special cases
for determining relative stability.
Root location and its effect on time response, elementary idea of root locus, effect of addition of pole and zero on
proximity of imaginary axis. 10 Hrs
UNIT-5:
Frequency response method of analyzing linear system, Polar, Nyquist and Bode plot, stability and accuracy
analysis from frequency response, open loop and close loop frequency response, effect of variation of gain and
addition of pole and zero on response plot, stability margin in frequency response. 10 Hrs
UNIT-6:
State variable methods of analysis, characteristics of system state. Choice of state variables, representation of vector
matrix differential equation, standard form, relation between transfer function and state variables. 8 Hrs