Dear matlab users,
I face an issue while applying transfer function to some digitized signals. It results in a filtered signal with 1e305 amplitiude…
the sampling of my signals is 20 kHz. I use the c2d function with option 'leastsquare' to get teh Z transform of the considered transfer function, I use either the zpk or ft function to draw my transfer function.
Beside this the step function diverges too, so it seems the issue is within H (either the way I define it using "tf" or "zpk")
I thought once that it could come from the "lack" of precision of the coef given by matlab and I have realized that only the symbolic toolbox can provide unlimited precision
I don't know whether there are some obvious guideline to simulate such a system or whether I face a more fundemaental problem.
(I can be more specific on H if this can help for understanding the issue)
Many thanks for your feedback
Frederic
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