Control Systems Wiki Book
An open source book that is continuously developed (you can help too!) covering control systems. It is good in some parts such as control theory although not as deep as a more traditional work on the subject and it tends to focus on electrical systems rather than process control as used in manufacturing industries. However, it does give a very good introduction to the subject and there are some great references.
Michigan Chemical Engineering Process Dynamics and Controls Open Textbook
An excellent resource covering most of what you will need to understand the basics of process control. Developed from a process control course by Prof. Peter Woolf. Major sections include;
- Modeling Basics
- Modeling Case Studies
- Sensors and Actuators
- Mathematics for Control Systems
- PID control
- Dynamical Systems Analysis
- MIMO Control
URL (which is not working at the moment!): https://controls.engin.umich.edu/wiki/index.php/Main_Page
There are full videos too if you prefer that format.
Walter Driedger's Controlling Equipment
Walter Driedger is Senior Process Control Engineer for Colt Engineering of Calgary, Alberta, Canada and has produced this great website containing articles many of which have been published in Hydrocarbon Processing. Sections covered are;
- centrifugal pumps
- positive displacement pumps
- shell and tube heat exchangers
- steam heaters
- fired heaters
- vessels and tanks
It also has a folklore section to make you chuckle!