The interesting thing is that if you can reframe the problem correctly, a PID controller will probably be involved in the closed loop solution. And most of the time you don't even need the derivative term.
The last few systems I've worked on professionally have been nested PI controllers with some filters on the front or back of them. Just needed the correct framing for the problem (the hard part) and it becomes straightforward to solve.
The last few systems I've worked on professionally have been nested PI controllers with some filters on the front or back of them. Just needed the correct framing for the problem (the hard part) and it becomes straightforward to solve.