ECEA 5800 Modeling of Feedback Systems

1st course in the Control Systems Analysis​ Specialization

Instructor: Lucy Pao,ÌýPh.D., Professor

This course covers differential equation derivation to model systems, solving these equations through Laplace transforms to determine transfer functions for simple mechanical, electrical, and electromechanical systems. We will analyze 1st and 2nd-order system dynamic responses, and explore approximating higher-order systems with 1st to 3rd-order systems.Ìý Also covered, Bounded-Input Bounded-Output (BIBO) stability, plus designing and evaluating proportional, integral, and derivative controllers.

Learning Outcomes

  • Apply the Laplace transform initial/final value theorems to calculate these values of time-domain signals using their Laplace-domain representation
  • Manipulate block diagram representations of interconnected systems
  • Utilize transient step response data to estimate the 2nd-order transfer function approximation
  • Analyze LTI systems by utilizing the relationship between pole locations and step response performance specifications
  • Calculate system performance using transient step response specifications
  • Design stable proportional-feedback systems using Routh’s stability criterion
  • Apply necessary and sufficient conditions for Bounded-Input Bounded-Output (BIBO) stability to analyze LTI systems

Syllabus

Duration: 3Ìýhours

This first week combines the essential concepts of control systems and differential equations. You will explore the foundations of control theory, understand the significance of feedback control, and master the application of Laplace transforms in solving ordinary differential equations. By the end of this week, you will possess a solid understanding of linearity, time-invariance, modeling approaches, and the practical uses of control systems.Ìý

Duration: 3Ìýhours

During the second week of this course, you will delve into the foundational laws used in modeling feedback systems. You will explore how these laws are applied to model simple mechanical, electrical, and electromechanical systems by deriving differential equations from fundamental principles such as Newton's laws of motion, Kirchhoff's laws, and the Motor/Generator laws. Additionally, you will gain proficiency in representing these systems as transfer functions using Laplace and inverse Laplace transforms, which will enable you to analyze and understand their behavior in the frequency domain. By the end of this week, you will have acquired the essential knowledge and skills to effectively model and analyze a wide range of dynamic systems.Ìý

Duration: 3Ìýhours

In the third week of this course, you will dive deeper into the application of Laplace transforms. You will start by learning how to use the initial/final value theorems to calculate the values of time-domain signals using their Laplace-domain representation. Additionally, you will develop the skills to manipulate block diagram representations of interconnected systems, enabling you to analyze complex systems and understand their overall behavior. You will also explore the dynamic response of 1st- and 2nd-order systems, gaining insights into their transient and steady-state characteristics. Lastly, you will discover techniques to approximate higher-order systems reasonably well by utilizing the impulse and step responses of lower-order systems. By the end of this week, you will have acquired advanced tools and techniques to analyze and model a wide range of dynamic systems with precision and accuracy.Ìý

Duration: 3Ìýhours

In the fourth week of this course, you will focus on system performance analysis using transient step response specifications. You will learn how to calculate and evaluate key performance metrics such as rise time, settling time, and overshoot using the step response of a system. By understanding the relationship between pole locations and step response performance specifications, you will gain insights into how system dynamics affect the overall performance. Furthermore, you will utilize transient step response data to estimate the 2nd-order transfer function approximation, enabling you to model and analyze complex systems accurately. Lastly, you will compare the impact of zeros and additional poles on the step responses of systems, deepening your understanding of how system components influence the overall behavior. By the end of this week, you will be equipped with the skills to assess and optimize system performance based on transient step response characteristics.

Duration: 3 hours

Congratulations on making it to the 5th and final week of this course. This week you will delve into the concept of Bounded-Input Bounded-Output (BIBO) stability and its application in analyzing Linear Time-Invariant (LTI) systems. You will learn the necessary and sufficient conditions for BIBO stability and apply them to assess the stability of dynamic systems. Additionally, you will explore Routh's stability criterion, which allows you to determine system stability. Furthermore, you will discover how to design stable proportional-feedback systems using Routh's stability criterion, enabling you to create control systems that exhibit desirable behavior. By the end of this week, you will have acquired the knowledge and skills to analyze, assess, and design stable systems using BIBO stability and Routh's stability criterion.

Duration: 2Ìýhours

Final Exam for this course.

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Grading

Assignment
Percentage of Grade

Week 1ÌýAssignment

15%

Week 2 Assignment15%

Week 3ÌýAssignment

15%

Week 4 Assignment15%

Week 5ÌýAssignment

15%

ECEA 5800 Modeling of Feedback Systems Final Exam25%

Letter Grade Rubric

Letter GradeÌý
Minimum Percentage

A

93%

A-90%
B+87%

B

83%

B-80%
C+77%

C

73%

C-70%
D+67%

D

60%

F

50%