reik
Junior Member level 3
For the Matlab bode diagram, normally when we want to obtain the gain margin, we have to cross the line from phase -180 and touch the curve. (Picture1 is what I did) however from the matlab, the gain margin crossover is start from -540 instead of -180 degree by using "Margin" function(Picture2 is what Matlab shown).
Attached is the problem's picture, may I know should I stick with -180 like the "picture1" ? or just follow what the Matlab show which is -540?
Attached is the problem's picture, may I know should I stick with -180 like the "picture1" ? or just follow what the Matlab show which is -540?