March 5, 2010

EC1304 CONTROL SYSTEMS


ANNA UNIVERSITY CHENNAI :: CHENNAI 600 025
CURRICULUM 2004
B.E. ELECTRONICS AND COMMUNICATION ENGINEERING

EC1304 CONTROL SYSTEMS

AIM
To familiarize the students with concepts related to the operation analysis and stabilization of control systems

OBJECTIVES

  • To understand the open loop and closed loop (feedback ) systems
  • To understand time domain and frequency domain analysis of control systems required for stability analysis.
  • To understand the compensation technique that can be used to stabilize control systems

UNIT I CONTROL SYSTEM MODELLING 9
System concept, differential equations and transfer functions. Modelling of electric systems, translational and rotational mechanical systems, Simple electromechanical systems.
Block diagram representation of systems – Block diagram reduction methods – Closed loop transfer function, determination of signal flow graph. Mason’s gain formula – Examples.

UNIT II TIME DOMAIN ANALYSIS 9
Test signals – time response of first order and second order systems – time domain specifications – types and order of systems – generalised error co-efficients – steady state errors – concepts of stability – Routh-Hurwitz stability – root locus.

UNIT III FREQUENCY DOMAIN ANALYSIS 9
Introduction – correlation between time and frequency response – stability analysis using Bode plots, Polar plots, Nichols chart and Nyquist stability criterion – Gain margin – phase margin.

UNIT IV COMPENSATORS 9
Realization of basic compensators – cascade compensation in time domain and frequency domain and feedback compensation – design of lag, lead, lag-lead compensator using Bode plot and Root locus. Introduction to P, PI and PID controllers.

UNIT V CONTROL SYSTEM COMPONENTS AND APPLICATION OF CONTROL SYSTEMS 9
Stepper motors – AC servo motor – DC servo motor – Synchros – sensors and encoders – DC tacho generator – AC tacho generator – Hydraulic controller – Pneumatic controller – Typical application of control system in industry.

TUTORIAL 15

TOTAL : 60
TEXT BOOKS

  • Ogata.K, Modern Control Engineering, Prentice Hall of India, 4th Edition, 2003 (UNIT I – IV)
  • Nagrath & Gopal, Control System Engineering, 3rd Edition, New Age International Edition, 2002. (UNIT V)

REFERENCES
1. Benjamin.C.Kuo, Automatic Control Systems, 7th Edition – Prentice Hall of India, 2002.
2. M.Gopal, Control Systems, Tata McGraw-Hill, 1997


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