文档介绍：Practical Control
Dr Robert Keatch
School of Engineering Physics & Mathematics
University of Dundee
EG32001 Control & Dynamical Systems
Course
Lectures: 8 hours
  
Examination:
Exam 75% [2hrs, 3 from 5 questions]
Assessed Coursework (MATLAB Assignment) 25%
mended Text
“Industrial Control & Instrumentation” Bolton W., Longman Scientific & Technical ISBN 0 582 06802 9
“Sensors for Measurement & Control” Elgar P., Addison Wesley Longman Ltd., ISBN 0 582 35700 4
“Measurement and Instrumentation Principles” Morris ., Butterworth Heinemann, ISBN 0 7506 5081 8
Overview
Measurement and Control Systems
Sensors and Transducers
Case Studies
Identifying Problem
Choosing Sensors
How to condition signals
Choosing Display
Checking for best solution
Measurement Systems
In engineering, measurement systems are used for essentially three main purposes:
1. to obtain data about some event
2. for inspection or testing
3. as an element in a control system
Measurement systems can be considered to have three basic constituent elements:
1. Transducer/sensing element
2. Signal conditioner
3. Display
Elements
The sensing element or, as it is frequently called, the transducer is the first element. This produces a signal which is related to the quantity being measured. Sensing elements take information about the thing being measured and change it into some form which enable the rest of the measurement system to give a value to it.
The second element is the signal conditioner or signal converter or signal processor. This takes the signal from the sensing element and converts it into a condition which is suitable for the display part of the measurement system, or in the case of a control system bining with the reference signal. An example of this might be an amplifier which takes a small signal from the sensing element and makes it big enough to activate the display.
The display or indicating element is where the output from the measuring system is displayed. This