Home Original page

Fix impuse response, input data only contains one input[0]==1 in each trace by KybernetikJo · Pull Request #1023 · python-control/python-control

import numpy as np
import control as ct
print(ct.__version__)

A = [[.5, 0.25],[.0, .5]]
B = [[1., 0,],[0., 1.]]
C = [[1., 0.],[0., 1.]]
D = [[0., 0.],[0., 0.]]
dt = True
sysd = ct.ss(A,B,C,D, dt=dt)
response = ct.impulse_response(sysd,T=dt*3)

U = np.zeros((2,2,4), dtype=float).astype(object)
U[0,0,0] = 1./dt
U[1,1,0] = 1./dt

print(np.array_equal(response.inputs,U))
display(U)
display(response.inputs)

Expected / New behavior

0.10.1.dev76+g4acc78b.d20240703
True
array([[[1.0, 0.0, 0.0, 0.0],
        [0.0, 0.0, 0.0, 0.0]],

       [[0.0, 0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0, 0.0]]], dtype=object)

array([[[1.0, 0.0, 0.0, 0.0],
        [0.0, 0.0, 0.0, 0.0]],

       [[0.0, 0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0, 0.0]]], dtype=object)

Old behavior

0.10.0
False
array([[[1.0, 0.0, 0.0, 0.0],
        [0.0, 0.0, 0.0, 0.0]],

       [[0.0, 0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0, 0.0]]], dtype=object)

array([[[1.0, 0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0, 0.0]],

       [[1.0, 0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0, 0.0]]], dtype=object)