Voices: Lipták

Béla Lipták defines 5 levels of process control

Manual, feedback, cascade, feedforward and lead/lag all have their place.

By Bela Liptak
May 11, 2015

In process control, there are at least five levels of sophistication that the automation engineer can apply. The advantage of the higher levels is better control, but applying a higher level also requires better understanding of the process. In the analog age, using higher levels of sophistication also involved substantially higher costs, but in the digital age, this consideration has become less significant. To illustrate the five levels, I will use the example of controlling the outlet temperature from a steam-powered liquid heat exchanger.

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