John Gerry, P.E., ExperTune
Articles
Control Systems February 1, 2002
Use Derivative Action Responsibly
Derivative action can give you the fastest response in loop tuning, but only if you use it responsibly. Too much derivative will make the loop unstable. Too little deviative will not benefit response, and could result in, for instance, a jittery control valve, creating greater wear and shortening time to replacement.
By John Gerry, P.E., ExperTune