The amount of change in open-loop gain needed to make a closed-loop system unstable is known as the gain margin.
What is gain margin in Nyquist plot?
The control system is stable if the gain margin is greater than one.
Why is gain margin important?
The degree to which the system will oscillate without limit is known as the gain margin.
Is gain margin always positive?
There is a When the gain margin is positive and phase margin is negative, the system is: Positive Stable.
What is the gain margin of the Bode plot never crosses degrees?
The gain margin is infinite if the phase never crosses -180 degrees. Peak and troughs in your curves can lead to instability in the system if you are very close to the 0dB line or the -180 degree line.