Robin2:
It's exactly that sort of practical issue that makes me think the "science" of PID is over-hyped. It's a great practical suck-it-and-see system. But I remain to be convinced that it is science in the sense the force = mass * acceleration is science....R
I never heard anybody say anything about pid or science of pid being overhyped before. It's all in the mind maybe. Or 'their' mind.
As we know.... if subsystems can be characterised in a way where a pid controller can be systematically designed ....where actual system behaviour can be predicted through design (eg. maths), then that's one way of doing things. And then there's the trial and error approach where people can tinker with p and i and d values until they get a combo that gets their job done. Understanding both sides can be handy.