CDS 101/110  System Modeling
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CDS 101/110a  Schedule  Recitations  FAQ  () 
Contents 
Overview
Monday: Introduction to Modeling (Slides, MP3)
This lecture provides an overview of modeling for control systems. We discuss what a model is and what types of questions it can be used to answer. The concepts of state, dynamics, inputs and outputs are described, including running examples to demonstrate the concepts. Several different modeling techniques are summarized, with emphasis on differential equations. Two examples are included to demonstrate the main concepts.
Wednesday: Modeling using Ordinary Differential Equation (Slides, MP3)
This lecture provides a more detailed introduction to the use of ordinary differential equations (ODEs) for modeling dynamical systems. A brief review of the solutions of second order linear ODEs is provided to make connection with prior coursework. The general form of nonlinear and linear ODEs is provided, along with an overview of some of the techniques for solving linear ODEs in special forms (scalar and diagonal systems). Analysis tools, including stability and frequency response, are illustrated. Finally, the use of block diagrams in control systems is introduced, including the standard symbology used in the text and an extended example (insect flight).
Friday: SIMULINK Tutorial  George Hines
This tutorial will provide an overview of the SIMULINK modeling tool.
Handouts
Monday

Wednesday (CDS 110)

Friday

Reading
 K. J. Åström and R. M. Murray,, Preprint, 2007..
Homework
This homework set demonstrates the construction and use of models for control systems. The first problem asks the student to identify the states, inputs, outputs, and dynamics for a sample systems. The second problem consists of a detailed construction of a vehicle model that can be used for cruise control. The last problem (CDS 110 only) explore discrete time modeling techniques.
FAQ
Monday
 How do we read the simulated predatorprey graph?
 Is there any open source software we can use instead of MATLAB?
 What are the Di parameters in the power grid model?
 What is a finite state machine and how does it relate to the traffic example?
 Where can I find a theoretical definition of dynamical system?
 Why was there only one damper in the mass/spring model?
Wednesday
Friday
Homework