control.phase_crossover_frequencies¶
- control.phase_crossover_frequencies(sys)¶
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
>>> tf = TransferFunction([1], [1, 2, 3, 4]) >>> phase_crossover_frequencies(tf) (array([ 1.73205081, 0. ]), array([-0.5 , 0.25]))