frodonet
Posts:
5
From:
malaysia
Registered:
10/24/10


[Matlab Question] Converting H(s) to H(z) using derivative approximation?
Posted:
Oct 24, 2010 3:21 AM


Hi All,
I been having some issue with my lab work.
I'm supposed to do :
Transfer function H(s): 1  s^4 + 2.613 s^3 + 3.414 s^2 + 2.613 s + 1
Convert H(s) into a digital IIR filterH(z)using the derivative approximation method for the following three cases: T=0.05, T=0.25 and T=0.5.
The problem is, I unable to use Matlab to convert the transfer function from s to z, when s = (1  z^1) / T.
Matlab can only accept variable (z^1)
Not sure why, and when i see the calculation part, the maths is so rigorous....and
I need to know whether using matlab is possible to find the coefficients of z?

