def test_add_inconsistent_dimension(self):
"""Add two transfer function matrices of different sizes."""
sys1 = TransferFunction([[[1., 2.]]], [[[4., 5.]]])
sys2 = TransferFunction([[[4., 3.]], [[1., 2.]]],
[[[1., 6.]], [[2., 4.]]])
with pytest.raises(ValueError):
sys1.__add__(sys2)
with pytest.raises(ValueError):
sys1.__sub__(sys2)
with pytest.raises(ValueError):
sys1.__radd__(sys2)
with pytest.raises(ValueError):
sys1.__rsub__(sys2)
def test_size_mismatch(self):
"""Test size mismacht"""
sys1 = ss2tf(rss(2, 2, 2))
# Different number of inputs
sys2 = ss2tf(rss(3, 1, 2))
with pytest.raises(ValueError):
TransferFunction.__add__(sys1, sys2)
# Different number of outputs
sys2 = ss2tf(rss(3, 2, 1))
with pytest.raises(ValueError):
TransferFunction.__add__(sys1, sys2)
# Inputs and outputs don't match
with pytest.raises(ValueError):
TransferFunction.__mul__(sys2, sys1)
# Feedback mismatch (MIMO not implemented)
with pytest.raises(NotImplementedError):
TransferFunction.feedback(sys2, sys1)
def testAddition(self, tsys):
# State space addition
sys = tsys.siso_ss1 + tsys.siso_ss1d
sys = tsys.siso_ss1 + tsys.siso_ss1c
sys = tsys.siso_ss1c + tsys.siso_ss1
sys = tsys.siso_ss1d + tsys.siso_ss1
sys = tsys.siso_ss1c + tsys.siso_ss1c
sys = tsys.siso_ss1d + tsys.siso_ss1d
sys = tsys.siso_ss3d + tsys.siso_ss3d
sys = tsys.siso_ss1d + tsys.siso_ss3d
with pytest.raises(ValueError):
StateSpace.__add__(tsys.mimo_ss1c, tsys.mimo_ss1d)
with pytest.raises(ValueError):
StateSpace.__add__(tsys.mimo_ss1d, tsys.mimo_ss2d)
# Transfer function addition
sys = tsys.siso_tf1 + tsys.siso_tf1d
sys = tsys.siso_tf1 + tsys.siso_tf1c
sys = tsys.siso_tf1c + tsys.siso_tf1
sys = tsys.siso_tf1d + tsys.siso_tf1
sys = tsys.siso_tf1c + tsys.siso_tf1c
sys = tsys.siso_tf1d + tsys.siso_tf1d
sys = tsys.siso_tf2d + tsys.siso_tf2d
sys = tsys.siso_tf1d + tsys.siso_tf3d
with pytest.raises(ValueError):
TransferFunction.__add__(tsys.siso_tf1c, tsys.siso_tf1d)
with pytest.raises(ValueError):
TransferFunction.__add__(tsys.siso_tf1d, tsys.siso_tf2d)
# State space + transfer function
sys = tsys.siso_ss1c + tsys.siso_tf1c
sys = tsys.siso_tf1c + tsys.siso_ss1c
sys = tsys.siso_ss1d + tsys.siso_tf1d
sys = tsys.siso_tf1d + tsys.siso_ss1d
with pytest.raises(ValueError):
TransferFunction.__add__(tsys.siso_tf1c, tsys.siso_ss1d)