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Le mercredi 23 mai 2012 à 10:01 +0200, otti a écrit :
Hello everyone,
after reading some threads about step response problems in the mailing list i couldnt come up with a proper solution for my problem.
I've got the following transfer function:
G = Vr/(sT1*(1+sT2))
Vr = 2/15 T1 = 0.2 T2 = 1
This transfer function involves an integrator (leading to the slope after the transient) and a first-order low-pass filter (leading to a damped contribution, the transient). IMHO, the step_response.png file is more probably correct than the TA1.jpg file, as there is no second-order term that would possibly lead to the oscillation shown in the latter. Moreover, the action of the integrator for a step response can not lead to a constant steady state. Am I wrong? Looking at the fonts, I believe the step_response.png file comes from matplotlib, and then from your python script. What makes you sure the matlab script is correct? -- Fabrice Silva