What is Feedforward Control ?
“Feedforward” is a rather under-used control strategy capable of managing a great many types of process problems. It is based
Relation Control System
A control strategy similar to ratio control is relation control. This is similar to ratio control in that a “wild”
What is Ratio Control ?
Most people reading this article have likely had the experience of adjusting water temperature using two hand valves as they
Ratio Controller Example
An example of ratio control at work is in a process whereby hydrocarbon gases (usually methane) are converted into hydrogen
Thermocouple Calculations
The voltage generated by a thermocouple is a function of the temperature difference between the measurement and reference junctions. Traditionally
Liquid In Glass Thermometer Principle
The liquid in glass thermometer, is the most commonly used device to measure temperature and it is inexpensive to make
How to Convert Cable Size from AWG to Inches
How to Convert Cable Size from AWG to Inches ? Here is the formula for conversion of cable size from
Cascade Control
A simple control system drawn in block diagram form looks like this: Information from the measuring device (e.g. transmitter) goes
Supervisory Control
In a manually-controlled process, a human operator directly actuates some form of final control element (usually a valve) to influence
Tuning a Temperature Process Control Loop
Tuning a Temperature Process Control Loop Ziegler-Nichols open-loop tuning procedure This next simulated process is a temperature control process. Performing