bode — SciPy v1.15.3 Manual (original) (raw)

scipy.signal.dlti.

dlti.bode(w=None, n=100)[source]#

Calculate Bode magnitude and phase data of a discrete-time system.

Returns a 3-tuple containing arrays of frequencies [rad/s], magnitude [dB] and phase [deg]. See dbode for details.

Examples

from scipy import signal import matplotlib.pyplot as plt

Construct the transfer function \(H(z) = \frac{1}{z^2 + 2z + 3}\)with sampling time 0.5s:

sys = signal.TransferFunction([1], [1, 2, 3], dt=0.5)

Equivalent: signal.dbode(sys)

w, mag, phase = sys.bode()

plt.figure() plt.semilogx(w, mag) # Bode magnitude plot plt.figure() plt.semilogx(w, phase) # Bode phase plot plt.show()