I don't know much about electromechanical systems, but here are some thoughts.
You might find the SigmaDelta example in $PTII/ptolemy/domains/ct/demo/SigmaDelta/SigmaDelta.xml to be of interest. http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/ptII/ptolemy/domains/ct/demo/SigmaDelta/SigmaDelta.htm Ptolemy II has a GR domain that is great for visualizing mechanical systems. The bouncing ball demos and the Newton's cradle demos could b of interest. We've been doing a certain amount of work involving Zeno conditions, hopefully more of that work will appear later. In $PTII/ptolemy/domains/ct/demo, CartPendulum, Pendulum3D, SinuBouncing all are in the devel tree, which is available via cvs, see http://chess.eecs.berkeley.edu/ptexternal _Christopher -------- Dear Ptolemy users, I recently installed Ptolemy. I am interested in the simulation of electromechanical systems. I started by modelling the equations of a damped mechanical oscillator subject to an external force, which I modelled using a CurrentTime actor and an Expression actor, in my case an exponential impulse. This example works great. Now, I would like to substitute the exponential impulse by a more complex, arbitrary, waveform of the external force. My idea is to use a piece-wise linear waveform that I could modify to resemble a realistic mechanical impulse. Could someone give me an idea on how to do that? Is that possible with Ptolemy? I don't know if I should use a DE director (defining a sequence of values) inside the CT director that I use to solve the equations. Honetly, I am lost and don't know how to do it. Any hint will be very much appreciated. Francesc -- ------------------------------------------------------------------------ o o o Francesc Moll Echeto | High Performance IC Design Group o o o Dpt. Electronic Engineering | www: http://pmos.upc.es/blues o o o Univ. Politecnica de Catalunya | email: [EMAIL PROTECTED] U P C c/ Gran Capita s/n Ed. C4 | Tel: +34 934016846 08034 Barcelona, Spain | Fax: +34 934016756 ------------------------------------------------------------------------ --------------------------------------------------------------------------- - Posted to the ptolemy-hackers mailing list. Please send administrative mail for this list to: [EMAIL PROTECTED] -------- ---------------------------------------------------------------------------- Posted to the ptolemy-hackers mailing list. Please send administrative mail for this list to: [EMAIL PROTECTED]
