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Supplementary Material

The following material has been added as part of our on-going commitment broadening control education and practice. They are brief overviews of topics that are not only relevant to control engineers but also scientists and managers whose duties require them to have an understanding/appreciation of control related technologies and ideas.

If you wish to contribute material or you feel from your industrial, business or professional experience there are topics that should be included, please feel free to contact Graham Goodwin.

New materials will be added over time so remember to revisit this site.

Module I. Supply Chain Management

Supply Chain Management is a term to used to describe the optimization of factors which impact on the delivery of products and services to customers in a way that brings mutual benefit and reward to the company and it's customers. The following PDF documents provide an introduction and overview of this fascinating area of control:

The above Overview may also be viewed online:

  • Tiled Overview of all slides
  • Goto the first slide
  • Jump to slide

Module II. Programmable Logic Controllers (PLCs)

Programmable Logic Controllers are special purpose computers aimed at implementing control solutions. They are used extensively in a large variety of industries and applications.

Garry Johnston, an engineer with many years of experience using PLCs and SCADA systems for the mining industry wrote the following introduction:

Module III. On-Off Control

On-Off control is the simplest form of control. The essential idea is that when the controlled variable (say a temperature) falls below a desired value, then the controller output is turned on. Similarly, when the controlled variable rises above the desired value, then the controller output is turned off. Readers will be familiar with this type of controller in air conditioners, refrigerators, etc.

The attached (PDF) slides, contributed by Daniel Quevedo,

form a self contained lecture on this topic. These could be used in a first course on control to introduce basic control principles.

Note, on-off controllers are very commonly used in industry. They would normally be implemented in a Programmable Logic Controller (PLC).