A practical guide of PID Tuner [pdf]

see also https://en.wikipedia.org/wiki/PID_controller

This has nothing to do with Linux PIDs!

note: title incorrect, this link does NOT point to PDF, just to Github's preview page.

You can still get the pdf if you click download button, but this is optional.

A PID tuning guide with almost no math. But very important thing to consider when making an system identification test indeed.