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3. Design Model 2. Analysis A model is used for the analysis and design of
control systems. What is the “mathematical model”?
Modeling of electrical circuits
3 4 Important remarks on models A Brief Control History
1788: James Watt’s fly-ball governor
Watt’ fly- Modeling is the most important and difficult task
in control system design.
No mathematical model exactly represents a
physical system. Mechanical feedback control of steam supply to an engine
Mechanical Do not confuse models with physical systems!
In this course, we may use the term “system” to
mean a mathematical model.
5 6 The Block Diagram The Block Diagram Communication tool for Engineering Systems
Communication Blocks Connect to form systems
Blocks Composed of Blocks with inputs and outputs
with Outputs of one block becomes input to another
Load “Disturbance” “Input”
“Input” 7 Steam
“Output” 8 The Block Diagram Transfer function Blocks Connect to form systems
Blocks A transfer function is defined by
transfer Outputs of one block becomes input...
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- Spring '08