Design model 2 analysis a model is used for the

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Unformatted text preview: odel 3. Design Model 2. Analysis A model is used for the analysis and design of model analysis design control systems. What is the “mathematical model”? What model” Transfer function Transfer Modeling of electrical circuits Modeling 3 4 Important remarks on models A Brief Control History 1788: James Watt’s fly-ball governor 1788: Watt’ fly- Modeling is the most important and difficult task Modeling in control system design. No mathematical model exactly represents a No physical system. Mechanical feedback control of steam supply to an engine Mechanical Do not confuse models with physical systems! Do In this course, we may use the term “system” to In 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 Composed with Outputs of one block becomes input to another Load “Disturbance” “Input” Steam Flow “Block” Steam Engine “Output” Engine Speed Valve Angle “Input” 7 Steam Valve Steam Flow “System” Steam Engine Engine Speed “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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