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Gain margin is a factor by which the gain of a stable system is allowed MATLAB TUTORIAL 131 Bode plot consists of two graphs in rectangular coordinates. Then use the right-click menu and select Nyquist under Plot Type. To find the gain and phase margins as well as the gain and phase margin frequencies, use the This MATLAB function creates a Nyquist plot of the frequency response of a dynamic system model Obtain Real and Imaginary Parts of Frequency Response. Two important notions can be derived from the Nyquist diagram: phase and gain stability margins. The phase and gain stability margins are presented in FigurePoles on the imaginary axis. Phase Margin and Gain Margin. • Reading Stability Margins off the Nyquist Plot. M. Peet. Lecture 23: Control Systems. DETERMINATION OF Nyquist PLOT USING MATLAB CONTROL SYSTEM TOOLBOX FOR 2ND ORDER The gain margin is the difference between 0 dB and the gain at the. margin. Returns the gain margin, phase margin, and crossover frequencies, see also bode norm. Norm of a vector nyquist1. Draw the Nyquist plot,