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Unformatted text preview: Digital control systems Control is a hidden technology: When it works well nobody notices! Espresso machine: 1 or 2 loops (temperature, pressure). Automobile: 5 to 20 control loops (engine, climate, brakes, radio) Mars rovers: 10 to 20 control loops (navigation, speed control) Aircraft: 50 or more loops (flight control, servos, redundancy) Process control: 100 to 1000 control loops (levels, temperature, pressures) And when it doesnt the results can be catastrophic. Saab aircraft crash: pilot/control system interaction Chernobyl nuclear reactor: operation at an unstable condition Roy Smith: ECE 147b 1 : 2 Discrete-time systems Objective: Designing digital control systems. These typically arise in one of two ways: The system we wish to control is digital. For example:- NYSE end of day prices;- Internet traffic;- Number of students in ECE 147b. The system is continuous and we are sampling it via an A/D board and actuating it via a D/A board. For example:- Electromechanical systems (robots, motors, vehicles);- Complex chemical production processes....
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This note was uploaded on 04/06/2010 for the course ECE 145 taught by Professor Rodwell during the Spring '07 term at UCSB.
- Spring '07