control.phase_crossover_frequencies
- control.phase_crossover_frequencies(sys)[source]
Compute frequencies and gains at intersections with real axis in Nyquist plot.
- Parameters
sys (SISO LTI system) –
- Returns
omega (ndarray) – 1d array of (non-negative) frequencies where Nyquist plot intersects the real axis
gain (ndarray) – 1d array of corresponding gains
Examples
>>> G = ct.tf([1], [1, 2, 3, 4]) >>> x_omega, x_gain = ct.phase_crossover_frequencies(G)