ANNA UNIVERSITY, CHENNAI
REGULATIONS - 2013
M.E. APPLIED ELECTRONICS
AP7003 DIGITAL CONTROL ENGINEERING
COURSE OBJECTIVES: 1. To study the principles of PI,PD,PID controllers.
2. To analyse time and frequency response discrete time control system.
3. To familiarize and practice digital control algorithms
4. To implement PID control algorithms using microprocessors, microcontrollers.
UNIT I PRINCIPLES OF CONTROLLERS
Review of frequency and time response analysis and specifications of control systems, need for
controllers, continues time compensations, continues time PI, PD, PID controllers, digital PID
controllers.
UNIT II SIGNAL PROCESSING IN DIGITAL CONTROL
Sampling, time and frequency domain description, aliasing, hold operation, mathematical model
of sample and hold, zero and first order hold, factors limiting the choice of sampling rate,
reconstruction.
UNIT III MODELING AND ANALYSIS OF SAMPLED DATA CONTROL SYSTEM
Difference equation description, Z-transform method of description, pulse transfer function, time
and frequency response of discrete time control systems, stability of digital control systems,
Jury's stability test, state variable concepts, first companion, second companion, Jordan
canonical models, discrete state variable models, elementary principles.
UNIT IV DESIGN OF DIGITAL CONTROL ALGORITHMS
Review of principle of compensator design, Z-plane specifications, digital compensator design
using frequency response plots, discrete integrator, discrete differentiator, development of
digital PID controller, transfer function, design in the Z-plane.
UNIT V PRACTICAL ASPECTS OF DIGITAL CONTROL ALGORITHMS
Algorithm development of PID control algorithms, software implementation, implementation
using microprocessors and microcontrollers, finite word length effects, choice of data acquisition
systems, microcontroller based temperature control systems, microcontroller based motor
speed control systems.
TOTAL:45 PERIODS
REFERENCES :
1. M.Gopal, "Digital Control and Static Variable Methods", Tata McGraw Hill, New Delhi, 1997.
2. John J. D'Azzo, "Constantive Houpios, Linear Control System Analysis and Design", Mc
Graw Hill, 1995.
3. Kenneth J. Ayala, "The 8051 Microcontroller- Architecture, Programming and Applications",
Penram International, 2nd Edition, 1996.
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