RE: Converting transfer function from s-domain to z-domain

[dastew]

> Date: Sun, 7 Mar 2010 20:11:54 -0800
> From: address@hidden
> Subject: Converting transfer function from s-domain to z-domain
> To: address@hidden
>
> By any chance is there a function to convert a transfer function from s-domain to z-domain?
>
> For example, assume I have spring-mass-damper second order system transfer function in the s-domain:
> http://wikis.controltheorypro.com/index.php?title=Second_Order_Systems
>
> Is there a function in Octave or one of its packages that would allow me to automatically convert that over to the z-domain?
>
> Thanks again for any insights and feedback.
>
>
>
> _


Yes there is.   --->  c2d

But there are many different ways to move from Laplace space to Z space. Each method will give a different result. If you wont step invariant results use the ZOH , if you want the same cut-off frequency use the prewarped technique, etc.

Doug Stewart