Introduction to Control Systems DEU-MEE 5017 Advanced Automatic Control

Examples of control system Example 1.1: Temperature control at a home Example 1.2: Cruise control for a car Example 1.3: Control of mechanical systems

: Reference temp. : Measured temp. : Disturbance Example 1.1: Temperature control at a home : Reference temp. Controller (Thermostat) Temperature Sensor : Measured temp. : Disturbance Control signal (heat transfer: door, window, wall, etc.) Fuel flow Heater Valve a) Open loop control: + Valve + Plant Sensor b) Closed loop control: + + Controller Valve + Plant Sensor -

Example 1.2: Cruise control for a car Fp: Pushing force (from engine) Fd: Distrubance (wind, gravity, enviromental factors, etc.) a) Open loop block diagram: (Schematically) b) Closed loop block diagram: (Schematically)

Gc(s)=Kp (Proportional control) Example 1.2: Cruise control for a car (Continue) Fp: Pushing force (from engine) Fd: Distrubance Fd=0 Fd=-mgsin a) Open loop control: - Ke + G(s) Ks b) Closed loop control: Gc(s)=Kp (Proportional control) - + Gc(s) Ka G(s) Ke + Ks -

References Open course lecture notes, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2.004 Dynamics and Control II, Spring Term 2008. www.ocw.mit.edu/