Control Lecture Ppt

© 2013 – University of the West of England

02/12/2013

UWE Bristol

Industrial Control UFMF6W-20-2

Control Systems Engineering UFMEUY-20-3

Lecture 1: Introduction to Control

Teaching • Course structure:  – 1 hour lecture + 2 hour tutorial per week  – Two modules, co-taught (assessments are different)  – 14 weeks control (Ben Drew & Neil Larsen)  – 6 weeks sensors and actuators (Sabir Ghauri)

• Tutorials:  – 1st Semester: Classroom examples/problems  – Tutorial Sheets on Blackboard (and solutions)  – 2nd Semester: Laboratory (Simulink, DC motor control + sensors and actuators)

• Lecture videos

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© 2013 – University of the West of England

02/12/2013

 Assessment • 1 coursework – laboratory report (40%)  – Group report

• Exam after Easter Break (60%) • Reading list:  – The Art of Control Engineering , Ken Dutton, Steve Thompson, Bill Barraclough  – Control Engineering , W. Bolton  – Control Systems Engineering , N.S. Nise  –  Aircraft Control and Simulation, B.L. Stevens & F.L. Lewis

 Aims and Objectives • Control  – System modelling  – Transfer functions  – System performance  – System frequency response  – System identification  – Controller design

• Sensors and Actuators

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© 2013 – University of the West of England

02/12/2013

Today’s Lecture • Introduction to Control • Examples • Control Basics • Open- and Closed-loop control • Control System Design Steps • Example Models

Introduction to Control • What is a control system? • Common example in the human body: temperature control External temperature Sun, Illness, etc.

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© 2013 – University of the West of England

02/12/2013

Introduction to Control •  Applications in:  – Physiology  – Economics  – Many fields of engineering: • Hydraulics • Electronics • Mechanics • Etc.

Simple Examples • Car speed Desired speed

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• Room fan Desired cooling

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Actual speed

System or Plant Electrical power

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 Actual cooling

Controller

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© 2013 – University of the West of England

02/12/2013

Examples • Control systems are required in complex machines, devices  – Aircraft control systems  – Anti-lock braking systems  – Manufacturing processes

Examples • Inverted Pendulum  – Demo

• Videos  – http://tinyurl.com/uwetriple  – http://tinyurl.com/uweballrobot  – http://tinyurl.com/uwebigdog  – http://tinyurl.com/uwekestrel

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© 2013 – University of the West of England

02/12/2013

Control Basics • What is common for all these systems? •  A physical quantity has to be maintained at a fixed value (or series of values) • What information is necessary?  – What the system needs to do  – How well is the system is doing  – What control action keeps maintains the action

Open and Closed Loop Control • Open Loop  – Turntable example Battery

Speed Turntable

Speed setting

Desired speed (voltage)

DC motor

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