Group B
Control
Open loop and closed loop control systems. Concept of linear and nonlinear systems.
Transfer functions a block diagrams. Signal flow graph.
State variables: State equations. Matrix representation of state equations. Relationship
between state equations and transfer functions.
Time response: Transient analysis of feedback systems  First and second order systems.
Steady state error and error coefficients.
Frequency response: Polar plots, Bode plots, logarithmic vs. phase plots.
Stability: Concept and determination of absolute stability. Routh's criterion. Nyquist criterion.
Rela1 stability. Determination of gain and phase margin from Nyquist and Bode plots.
Root locus: Definitions. Construction of root loci. Root contours, S plane analysis of
systems.
Control system components: D.C. and A.C. tachogenerator, synchros, D.C. and A.C.
preamplifier Servo potentiometers and gyroscopes.
