from sympy.abc import s
from sympy.physics.control.lti import TransferFunction
from spb import *
tf1 = TransferFunction(
    8*s**2 + 18*s + 32, s**3 + 6*s**2 + 14*s + 24, s)
graphics(
    impulse_response(tf1),
    xlabel="Time [s]", ylabel="Amplitude"
)