ECE 551 Introduction to Feedback Control Systems  Autumn 2008 Instructor: Prof. Andrea Serrani. Office: 412 Dreese Lab. E-mail: serrani@ece.osu.edu.

Please note: This is not the official web page of the course, hence it will not be updated. The official web page of the course is developed on Carmen. Registered students will have access from Carmen to all the additional information on the course, including notes, homework sets, solutions, and syllabus.

Office hours: Monday and Wednesday, 4:30pm - 6:00pm
Teaching Assistant:

Prerequisite(s): Fourier transform, Laplace transform, Bode plots, impulse response and transfer function of a linear time-invariant system. ECE 352.

Course description: The course provides introductory, fundamental concepts in feedback control systems, design and analysis techniques. Students will apply knowledge gained in mathematics, physical sciences and engineering courses to derive mathematical models of typical engineering systems to be controlled. Students will learn how to identify, formulate and solve control problems.

Topics: Modeling of mechanical and electro-mechanical systems. Principles of feedback. Open loop response, and time domain specifications. Stability and Routh criterion. Lead/lag compensator design using root locus. Bode plots and stability (gain and phase) margins. Lead/lag and PID compensator design using Bode plots. State variable approach, stability analysis and pole placement.

A note on prerequisites: Prerequisites are there for a reason. I am not going to teach again Laplace transform, Bode plots, or the method of partial fraction expansion. Also, familiarity with complex variables and linear algebra is essential.

Textbook:

• Modern Control Systems, R. Dorf and R. Bishop, Prentice Hall, 11th Edition, 2008
About Earlier Editions of the Textbook: You can use the 10th edition (or even the 9th edition), as the content differs only slightly from the 11th edition. However, you will be doing so at your own risk, and you will be responsible for matching the content of the book you are using with the topics discussed in class. This is especially important as far as homework problems are concerned, which change drastically from one edition to another. Failure to turn in the correct assignment due to a book mismatch will not be excused.

Grading:  Homework 20%. Midterm Exam (2): 20% each. Final Exam: 40%.

Homework policy: Homework sets are posted on Carmen weekly. You are responsible for all assignments and announcements posted on Carmen or given in class. No late submission is accepted, unless previous arrangements have been made. Homework can be submitted electronically using Carmen only or in class on due date. Homework submitted via email will be discarded. You are strongly encouraged to use a word processor to typeset your homework (LaTeX is the best choice).
Points will be taken out by the TA or myself if your solution is poorly or sloppy written. All homework set will be collected, but only some of the problems may be graded. Grades will be post on Carmen. You must submit your own work. Recall that, according to OSU regulations, the instructor must report any academic misconduct.

Exam Policy: The midterm exams and the final are open-book, closed-notes. You are allowed to bring a 1-page 2-side cheat-sheet. IMPORTANT: the exams must be readable. Please, do not scatter your solution around the page. Write in a clear, organized, and concise matter. I WILL NOT give any point to solutions that need to be decoded. Also, show all the relevant work: writing down the answer with no development of the solution whatsoever will result in no credit.

 Topics 1. Mathematical Models of Dynamical Systems (Chapters 2 and 3). 2. Principles of Feedback (Chapter 4). 3. Time Domain Performance (Chapter 5). 4. BIBO Stability and Routh-Hurwitz Stability Test (Chapter 6). 5. The Root Locus Method (Chapter 7, and Sections 7,8 of Chapter 10). 6. Frequency Domain Design Using Bode Plots (Chapter 8, Chapter 9, Sections 9.6-9.7, Chapter 10). 7. State Variable Approach, Pole Placement (Chapters 3 and 11).