Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: [Matlab Question] Converting H(s) to H(z) using derivative approximation?
Replies: 8   Last Post: Dec 7, 2013 3:13 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
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
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

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?



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.