Yeah, as a controls engineer I’ve worked on systems where the main requirement was not gain or phase margin, but a root sum square of the two. Nichols plots dri

Yeah, as a controls engineer I’ve worked on systems where the main requirement was not gain or phase margin, but a root sum square of the two. Nichols plots drive home the idea that it’s not really the margin at two discrete points that matter, but the close approach to the critical point.