[python-control-discuss] python-control-4b

[Roberto B. <rob...@su...>]

Hi Richard

I've finally found some time to look the new modifications for your control 
toolbox. With few modifications I've reached to put the sampling time in the 
new matlab.py, statesp.py and xferfcn.py files.

My examples run correctly again, but I have some problems with the step and 
step2 functions. Here is the code:

#-------------------------------------------------------
from matplotlib.pylab import *
from control.matlab import *
from scipy.signal import step, step2

# Motor parameters
Kt = 126e-6
Jm = 1.3024e-3
Dm = 857.4e-6

# Transfer function
g=tf([Kt/Jm],[1,Dm/Jm,0])  

# Continous state space form
a=[[0,1],[0,-Dm/Jm]]
b=[[0],[1]]
c=[[Kt/Jm,0]];
d=[0];
sysc=ss(a,b,c,d)

t1,y1 = step(g)
t2,y2 = step(sysc)
t1,y1 = step2(g)
t2,y2 = step2(sysc)
#---------------------------------------------------------
I have some problems with the step and step2 functions (linalg problems or 

    695         sys = system
    696     else:
--> 697         sys = lti(*system)
    698     if N is None:
    699         N = 100

TypeError: type object argument after * must be a sequence, not instance

Any Idea?

Thanks in advance

Roberto

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University of Applied Sciences of Southern Switzerland
Dept. Innovative Technologies
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