Re: How to multiply two transfer function ?

[Peter Gawthrop]

Just use tf3. As I said, I recommend typing:

octave> DEMOcontrol


to find out more.

Also please read the  Control Theory chapter of the octave manual.

     Best wishes,

     Peter


From: Kai Shing Lee <address@hidden>
Subject: Re: How to multiply two transfer function ?
Date: Wed, 18 May 2005 17:36:34 +0800 (CST)

> Thanks a lot.
> 
> Further question:
> 
> Do I need to re-form a transfer function ( e.g.
> tf4=tf(b3,a3) ) in order to use it for further
> manipulation ?  Or, just use the 'tf3' ?
> 
> 
> --- Peter Gawthrop <address@hidden> 撰寫:
> > tf3 = sysmult (tf1,tf2); 
> > [b3,a3] = sys2tf(tf3)
> > b3 =
> > 
> >   2.0000  3.0000  1.0000
> > 
> > a3 =
> > 
> >   1.0000  4.0000  7.0000  6.0000
> > 
> > Try DEMOcontrol for more info,
> > 
> >     Peter.
> > 
> > From: Kai Shing Lee <address@hidden>
> > Subject: How to multiply two transfer function ?
> > Date: Wed, 18 May 2005 12:26:27 +0800 (CST)
> > 
> > > 
> > > 
> > > How can I do "tf1*tf2" in octave ?
> > > 
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