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Hello,
I am testing theinterconnect function to integrate it withinnodedge editor, but I don't understand the behavior in theexample_with_connections.
In particular, I have the following warning:
UserWarning: Unused input(s) in InterconnectedSystem: (0, 1)=sum.p.y[0]And the step response is not the same as for theexample_with_explicit_signals.
Can you please explain me what I am doing wrong?
Best regards.
Anthony.
importcontrolasctimportnumpyasnpdefexample_with_explicit_signals():P=ct.tf2io([1], [1,1],inputs="u",outputs="y")C=ct.tf2io([1], [1,0],inputs="e",outputs="u")sumblk=ct.summing_junction(inputs=["ref","-y"],output="e",name="sum")io_closed=ct.interconnect([sumblk,C,P],inplist=["ref"],outlist="y")print(io_closed)time=np.linspace(0,10,100)t,y=ct.input_output_response(io_closed,time,U=30,X0=[0,15])print(y)returnydefexample_with_connections():P=ct.tf2io([1], [1,1],name="p",inputs=1,outputs=1,states="X0")C=ct.tf2io([1], [1,0],name="c",inputs=1,outputs=1,states="X1")sumblk=ct.summing_junction(inputs=["ref","p.y[0]"],output="e",name="sum")io_closed=ct.interconnect( [sumblk,C,P],inplist=["ref"],outlist="p.y[0]",connections=[ ("p.u[0]","c.y[0]"), ("c.u[0]","sum.e"), ], )print(io_closed)time=np.linspace(0,10,100)t,y=ct.input_output_response(io_closed,time,U=30,X0=[0,15])print(y)returnyif__name__=="__main__":np.testing.assert_array_equal(example_with_explicit_signals(),example_with_connections() )