[kepler-users] Using DifferentialSystem actor

[Godbole, Pranav]

Thanks Christopher! 

I'm not sure how I missed the demos, but the LorenzDifferentialSystem is exactly what I was looking for. 

Cheers! 

Pranav 

----- Original Message -----

From: "Christopher Brooks" <cxh at eecs.berkeley.edu> 
To: "Pranav Godbole" <pgodbole6 at gatech.edu>, kepler-users at kepler-project.org 
Sent: Monday, October 21, 2013 7:54:47 PM 
Subject: Re: [kepler-users] Using DifferentialSystem actor 



I'm not that familiar with the DifferentialSystem actor. 

The docs for the Ptolemy DifferentialSystem actor may be found at http://chess.eecs.berkeley.edu/ptexternal/src/ptII/doc/codeDocViptos/doc/codeDoc/ptolemy/domains/continuous/lib/DifferentialSystem.html 

There are these demos that might help: 


    * ptolemy/domains/gr/demo/FurutaPendulum/FurutaPendulum.xml 
    * ptolemy/domains/continuous/demo/FurutaPendulum/FurutaPendulum.xml 
    * ptolemy/domains/continuous/demo/Lorenz/LorenzDifferentialSystem.xml 

_Christopher 

On 10/21/13 4:42 PM, Godbole, Pranav wrote: 



Hi! 

I'm looking to solve a sizable number of 2nd order ODE's in Kepler. Given the large number of equations I need to solve, I think using the standard 'expression / integrator' method may become too messy, so I was looking into using the Differential System actor to keep things tidy. The problem is I'm not sure how to correctly use the actor. I found the documentation to be confusing and could not find any tutorials for Kepler/Ptolemy II/Simulink to clarify. If someone could write a quick tutorial using a minimal example (maybe an undamped pendulum) or point me in the right direction, I would greatly appreciate it! 

Aside: The ODE's are in reduced (1st order) form, so it is really just a matter of getting it into Kepler. 


Cheers, 

Pranav 

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-- 
Christopher Brooks, PMP                       University of California
Academic Program Manager & Software Engineer  US Mail: 337 Cory Hall
CHESS/iCyPhy/Ptolemy/TerraSwarm               Berkeley, CA 94720-1774 cxh at eecs.berkeley.edu , 707.332.0670           (Office: 545Q Cory) 
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