Gain and phase margin (Gm, Pm)
Gain margin (Gm)
Specifies the robustness to the gain changes in the closed loop. Should always be at least 2, which means that the Nyquist plot should cross the negative real axes at the right side from the value -1/2=-0.5. This specification can be used in our applets by mouse click in the Nyquist plot figure.
Phase margin (Pm)
Specifies the robustness to the delay changes in the closed loop. Should always be at least 60', which means that the Nyquist plot should cross the unit circle at the right side from the point with phase shift 60'. This specification can be also used in our applets by mouse click in the Nyquist plot figure.
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