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Re: SystemModeler Users?

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  • Subject: [mg129240] Re: SystemModeler Users?
  • From: "John Reed" <88ka5qep88 at>
  • Date: Tue, 25 Dec 2012 02:00:09 -0500 (EST)
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  • References: <kb1e5u$oum$>

I have the trial version of SystemModeler.  I'm trying to model a simple 
electronic filter circuit.  I was able to get a model working showing the 
spectrum of this filter with Electronic Workbench in about 15 minutes.  Then 
I decided to try SystemModeler to see if it could also do this model.  I was 
hoping I could use some of the Mathematica manipulate and plot routines to 
see how changing some of the components modified the spectrum.  This has not 
been easy and I have yet to get a spectrum out of it after several weeks of 
trying.  What one would normally do is to use a voltage source that sweeps 
through a defined range of frequencies to get the spectrum.  There is no 
source like this in SystemModeler that I have been able to find, and I've 
spent a lot of time looking.  The closest I have gotten is to get a step 
response which could be converted to a spectrum with a Fourier transform. 
However, I don't see any way to get to a transform in SystemModeler.  This 
system is hard to use.  It requires first setting up the model, then running 
a simulation, then finally going into Mathematica.  This is three different 
programs.  The routines in the Mathematica part seem to be limited.  Maybe 
there is a way to get the simulation into a useable form, but I'm running 
out of patience.  I don't plan to purchase this program.

John Reed

"Comer Duncan" <comer.duncan at> wrote in message 
news:kb1e5u$oum$1 at
> Hi,
> I bought SystemModeler a while back. I am wondering whether there are 
> SystemModeler users on this general list?  I have some questions about how 
> to convert a Berkeley Madonna model to SystemModeler.  When I asked 
> Support at Wolfram I was told that I'd have to buy support if my question 
> was coming more than 30 days after the purchase, which it definitely is. 
> So, I am wondering whether anyone has looked into how to relate models in 
> other formats to SystemModeler, since I guess it is ending up that I will 
> need to do the conversion myself.  Alas, I am a beginner.
> Thanks for your help. Also, I am interested in any ways users out there 
> are using SystemModeler since such information is usually useful to become 
> a better user of this software.
> Comer

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