8000 phase_crossover_frequencies generates errors with poles at origin · Issue #1105 · python-control/python-control · GitHub
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phase_crossover_frequencies generates errors with poles at origin #1105
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@murrayrm

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@murrayrm

Discussed in #1089

Originally posted by alittlepinetree December 31, 2024
When I used this function to calculate the phase crossover frequencies, it didn't work.
`import control
import matplotlib.pyplot as plt

G = control.tf([200.0], [1.0, 21.0, 20.0, 0.0])
x_omega, x_gain = control.phase_crossover_frequencies(G)
print(x_omega)`

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