ELECTRONICS AND COMMUNICATION ENGINEERING


ADCS



Unit -I        CONTROL SYSTEM MODELING & STATE VARIABLE ANALYSIS



Basic elements of control system – open loop and closed loop systems: differential equation - transfer function, modeling of electric systems, translational and rotational mechanical systems - block diagram reduction techniques - signal flow graph. State space representation of continuous time systems – physical systems and phase variable model.

Unit -II     TIME DOMAIN AND STABILITY ANALYSIS



Time response analysis: first order systems - impulse and step response analysis of second order systems. Root locus technique: construction of root locus- stability - dominant poles. Routh - Hurwitz criterion: relative stability. 

Unit -III     FREQUENCY DOMAIN AND STABILITY ANALYSIS



Frequencyresponse - correlation between time and frequency responses – bode plot, polar plotfrequency domain specifications from the plots - nyquist plot, nyquist stability criterion. 

Unit -IV     DESIGN OF COMPENSATORS IN FREQUENCY DOMAIN 



P, PI, PD and PID controllers: Introduction – transfer function model – characteristics; series, parallel and series- parallel compensation - Lead and Lag networks– series compensator designfor desired response usingBodediagrams. 

Unit -V      DIGITAL CONTROL SYSTEMS       



State space representation for discrete time systems – phase variable model Sampled data control systems – Sampling theorem – Sampler and Hold – open loop and closed loop sampled data systems.