ECE 421

Classical Systems and Control Theory
Spring 2000

Class Time: Tuesday and Thursday, 1:30 - 2:45 p.m., Robinson, Room A-205,
Dr. Beale
Graduate Teaching Assistant: Sirisha Kesapragada
Office Hours: Wednesday 12:00 - 2:00 p.m. and Thursday 10:00 a.m. - 12:00 p.m.,
S&T II, Rm. 265.
Prerequisites: Grade of C or better in ECE 360/220 or POI
Text: Feedback Control Systems, 4th Edition, C. Phillips and R. Harbor, Prentice Hall, 2000

Honor Code and Exam Policy

All students are expected to abide by the George Mason University Honor Code. Sharing of ideas and comparison of answers on homework is acceptable and encouraged, but copied work will not be accepted. All tests and the final exam will be closed book and closed notes unless specifically stated otherwise by the Instructor. All work must be your own. Any reasonable suspicion of an honor violation will be reported.

Students must arrive in class within 15 minutes of the scheduled starting time for all tests and exams. Students arriving later than 15 minutes after the scheduled starting time will not be allowed to take the test/exam and will receive a grade of 0 for the test/exam.

Homework Assignments


Design Project




Important Dates

Course Outline


Learn the purposes, advantages and disadvantages, terminology, and configurations of feedback control systems.
Learn ways of classifying, measuring, and analyzing the stability and performance properties of feedback control systems.
Learn various classical frequency domain and time domain techniques for designing compensators in order to improve performance in feedback systems.

Prerequisites by topic:

Knowledge of Fourier and Laplace transforms.
Ability to develop transfer functions for linear electrical circuits.
Knowledge of relationship between system poles and time- domain performance.
Knowledge of the concept of system frequency response.

Course Requirements:

Important Dates:

Test 1 -- Tuesday, February 29, Chapters 1, 4, 5
Test 2 -- Thursday, April 6, Chapters 6, 7
Final Exam -- Thursday, May 11, 1:30 - 4:15 p.m., Comprehensive, Chapters 8 and 9 emphasized.
Last day to drop classes without Dean's permission -- Friday, February 25.
No Class March 13 - 19 due to Spring Break!!

Course Outline:

Chapter 1 -- Introduction, what control systems are, types of control systems, examples of control systems, what feedback is and why it is used - 1 class period.

Chapter 4 -- Time and frequency domain characteristics of first-order and second-order systems, higher-order systems, reduced-order models - 4 class periods.

Chapter 5 -- Important characteristics of control systems, closed-loop stability, sensitivity and disturbance rejection. steady-state accuracy - 3 class periods.

Chapter 6 -- Stability analysis with the Routh array, robustness of the control system - 3 class periods.

Chapter 7 -- Closed-loop poles and their movement, concept of the root locus, magnitude and phase criteria, phase lag and phase lead compensators, lag-lead compensation - 5 class periods.

Chapter 8 -- Frequency response of the system, Bode diagrams, polar plots and the Nyquist stability criterion, gain and phase margins - 6 class periods.

Chapter 9 -- Specifications for control systems, designing compensators in the frequency domain, phase lag and phase lead compensators, lag-lead compensation - 4 class periods.

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Lastest revision on Wednesday, June 7, 2006 11:42 AM