Learn to Ride the Electrohydraulic PID Seesaw
Proportional integral derivative control can easily be understood through simple analogies.
http://hydraulicspneumatics.co…ie-pid-control-dummies-me
Maybe it can interest people, innocents and less innocents.
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When explaining operation of complex equipment, such as an electro-hydraulic closed-loop position control, different approaches are adopted depending upon who the explanation is aimed at. Such explanations tend to fall into one of two categories — a full mathematical analysis for people with a strong control theory background, and a very simplistic instruction-manual style for everyone else.
The explanation that follows aims to fall in between these two extremes for the benefit of those who do not have a classical control theory background but nevertheless want to understand something of the why of a control system rather than just the what. If you can grasp the basic function of each component or adjustment, you may not be able to design a system from scratch — but you should have a much better understanding of how it works, how to set it up, and what to look for when something goes wrong.
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