John Doty <j...@noqsi.com> wrote:
> 
> On Apr 7, 2010, at 11:54 AM, al davis wrote:
> 
>> On Wednesday 07 April 2010, Stuart Brorson wrote:
>>>> Do you foresee any other difficulties?  ... aside from
>>>> simulating a hydraulic circuit with spice or generating a
>>>> layout.
>>> 
>>> Actually, my first thought was:  What kinds of simulations
>>> (if any) does one do in hydraulics?  Are there any standard
>>> simulators?  If so, generating a netlist to feed to such a
>>> simulator might be an interesting hobby project.
>> 
>> If simulation means Spice to you, you are 20 years behind.
> 
> Unless you have deep pockets (and even for some who do), SPICE is today's 
> simulator. I know you don't like this, but it's the truth.
> 
>> 
>> Looking to the past ...  Simulations of things like this were 
>> (and are) often done on a proprietary commercial simulator 
>> "Saber", using a proprietary modeling language "Mast".  
>> Matlab/Simulink is also popular (and proprietary).
>> 
>> Looking forward ...  Things like this can be done very well in 
>> Verilog-AMS, which has a published standard, cleaner syntax, and 
>> several commercial implementations.  Many users of Saber and 
>> Mast are switching over.   Gnucap provides partial support for 
>> Verilog-AMS, and is working on more complete support.
> 
> But that's tomorrow. 
> 
> Another approach you'll hate is to use the symbolic capabilities of a 
> computer algebra system to analyze a design. See 
> http://www.noqsi.com/images/pareg.nb.pdf for an example hot off the press. 
> Unfortunately, the free software offerings don't seem to be up to this yet. 
> Fortunately, Mathematica isn't as pricey as fancy EDA tools, and gEDA can 
> feed it just fine.
> 
Umm, now that you mention Mathematica: Do you know of a way of feeding
from gEDA to Open Source computer math packages like octave or scilab?
Not that i'd currently feel a personal need of it, but i'm curious. Such
information often came in handy when i expected it the least
beforehand...

Greets,
Florian



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