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fix up some warning messages due to converted systems #907

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Jun 9, 2023
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5 changes: 4 additions & 1 deletion control/iosys.py
Original file line number Diff line number Diff line change
Expand Up @@ -2405,7 +2405,10 @@ def ss(*args, **kwargs):

# Create a state space system from an LTI system
sys = LinearIOSystem(
_convert_to_statespace(sys, use_prefix_suffix=True), **kwargs)
_convert_to_statespace(
sys,
use_prefix_suffix=not sys._generic_name_check()),
**kwargs)

else:
raise TypeError("ss(sys): sys must be a StateSpace or "
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7 changes: 5 additions & 2 deletions control/statesp.py
Original file line number Diff line number Diff line change
Expand Up @@ -1914,8 +1914,11 @@ def tf2ss(*args, **kwargs):
if not isinstance(sys, TransferFunction):
raise TypeError("tf2ss(sys): sys must be a TransferFunction "
"object.")
return StateSpace(_convert_to_statespace(sys, use_prefix_suffix=True),
**kwargs)
return StateSpace(
_convert_to_statespace(
sys,
use_prefix_suffix=not sys._generic_name_check()),
**kwargs)
else:
raise ValueError("Needs 1 or 2 arguments; received %i." % len(args))

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2 changes: 2 additions & 0 deletions control/tests/namedio_test.py
Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,8 @@ def test_io_naming(fun, args, kwargs):
sys_r.set_states(state_labels)
assert sys_r.state_labels == state_labels

sys_r.name = 'sys' # make sure name is non-generic

#
# Set names using keywords and make sure they stick
#
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2 changes: 1 addition & 1 deletion control/tests/xferfcn_test.py
Original file line number Diff line number Diff line change
Expand Up @@ -1254,7 +1254,7 @@ def test_zpk(zeros, poles, gain, args, kwargs):
])
def test_copy_names(create, args, kwargs, convert):
# Convert a system with no renaming
sys = create(*args, **kwargs)
sys = create(*args, **kwargs, name='sys')
cpy = convert(sys)

assert cpy.input_labels == sys.input_labels
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3 changes: 2 additions & 1 deletion control/xferfcn.py
Original file line number Diff line number Diff line change
Expand Up @@ -1813,7 +1813,8 @@ def ss2tf(*args, **kwargs):
if not kwargs.get('outputs'):
kwargs['outputs'] = sys.output_labels
return TransferFunction(
_convert_to_transfer_function(sys, use_prefix_suffix=True),
_convert_to_transfer_function(
sys, use_prefix_suffix=not sys._generic_name_check()),
**kwargs)
else:
raise TypeError(
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