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Introduction to Automatic Control

2009 Lecture Side. January 2009. Lecture by. Introduction to Automatic Control . Chapter One week1. Control Engineering. Reference Book. “Modern Control Engineering”, Katsuhiko Ogata, Prentice Hall. “Automotive Control Systems for Engine, Driveline

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Introduction to Automatic Control

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  1. 2009 Lecture Side January 2009 Lecture by Introduction to Automatic Control Chapter One week1 Control Engineering

  2. Reference Book • “Modern Control Engineering”, Katsuhiko Ogata, Prentice Hall. • “Automotive Control Systems for Engine, Driveline and Vehicle”, U.Kiencke and L.Nielsen, Springer. Control Engineering 2009 Subject Name Automotive Automatic Control

  3. How is it important? Good Improved control is a key enabling technology underpinning: - generally - Convenience and Comfort - doctor - Precision of tools - industry - Enhance product quality - Waste minimization - Higher safety margins Control Engineering 2009 Subject Name Automotive Automatic Control

  4. What is Control System? Open-Loop Control System (No feedback) Control Engineering 2009 Subject Name Automotive Automatic Control

  5. What is Control System? (2) Dynamic Response Open-Loop Control System (No feedback) Control Engineering 2009 Subject Name Automotive Automatic Control

  6. What is Control System? (3) Feedback • Feedback is a key tool that can be used to modify the behavior of a system. • This behavior altering effect of feedback is a key mechanism that control engineers exploit deliberately to achieve the objective of acting on a system to ensure that the desired performance specifications are achieved. Control Engineering 2009 Subject Name Automotive Automatic Control

  7. What is Control System? (4) Closed-Loop Control System (No feedback) Control Engineering 2009 Subject Name Automotive Automatic Control

  8. What is Control System? (5) Response of a position control system showing effect of high and low controller gain on the output response Control Engineering 2009 Subject Name Automotive Automatic Control

  9. Example Control System? (1) Temperature Control System ( Heater or Air Condition ) Control Engineering 2009 Subject Name Automotive Automatic Control

  10. Example Control System? (2) Open Loop Closed Loop Control Engineering 2009 Subject Name Automotive Automatic Control

  11. Example Control System? (3) Vehicle Control System Control Engineering 2009 Subject Name Automotive Automatic Control

  12. Example Control System? (4) Autopilot Control System Control Engineering 2009 Subject Name Automotive Automatic Control

  13. Control System Design Cycle Control Engineering 2009 Subject Name Automotive Automatic Control

  14. Modeling & Design in Control I. DYNAMIC MODELING • Deriving a dynamic model ( = set of differential equations that describes the dynamic behavior of the plant) • Linearization the dynamic model if necessary II. DESIGN OF A CONTROLLER: Several design methods • Classical control or Root Locus Design: Define the transfer function; Apply root locus, loop shaping, • Modern control: Convert ODE to state equation; Apply Pole Placement, Robust control, … • Nonlinear control: Apply Lyapunov’s stability criterion Control Engineering 2009 Subject Name Automotive Automatic Control

  15. Definition of state space representations Control Engineering 2009 Subject Name Automotive Automatic Control

  16. A first example of Modeling: DC Motor Control Engineering 2009 Subject Name Automotive Automatic Control

  17. A second example of Modeling: Suspension Control Engineering 2009 Subject Name Automotive Automatic Control

  18. A second example of Modeling: Suspension (2) Control Engineering 2009 Subject Name Automotive Automatic Control

  19. Linear systems : transfer function • Equivalence transfer function - state space representation Control Engineering 2009 Subject Name Automotive Automatic Control

  20. State-Space Representations of Transfer-Function Systems Go to Ogata Book 723 Control Engineering 2009 Subject Name Automotive Automatic Control

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