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Re: [Help-gnucap] Modal analysis using gnucap

From: asomers
Subject: Re: [Help-gnucap] Modal analysis using gnucap
Date: Tue, 21 Sep 2010 09:30:03 -0600

Very cool application.  Pole-zero analysis is not supported in gnucap
0.35, but I don't know about the development version of gnucap.
NGSpice can do it though (.PZ command) .

On Mon, Sep 20, 2010 at 2:59 PM, Jasper <address@hidden> wrote:
> Hi,
> I've been using gnucap for modelling pneumatic transmission lines with LCR
> equivalents. This linear AC analysis is working very nicely and the results
> are as expected. Now I'm wondering if it is possible to do a modal analysis
> of the whole system. That is, I would like to know the poles, zeros and mode
> shapes of the system. Is this possible to do in gnucap? If this is not
> implemented, would it be possible to maybe export the matrices generated for
> the system and solve the eigenvalue problem in another package? I don't know
> a lot about how the AC analysis is implemented so maybe I'm not making
> sense, but any help would be appreciated. Best regards,
> Jasper
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