Alan, I think that you have the deepest understanding of KTechLab (and it's problems) on the forum. If you can translate this understanding into producing solutions (i.e code) then I want you on the KTechLab development team.
Jason. On Thu, 2007-05-31 at 23:40 -0400, Alan Grimes wrote: > One of the deeper issues in Ktechlab is grounding. > > The issue about the glitiching out to giga-volts, is comparatively > trivial, requiring a better understanding of linear algebra, in that > trying to patch a singular matrix with a tiny value instead of 1 is > bound to make things a lot worse. (the problem being the singular matrix > in the first place...) > > Go research an app-note on power-factor correction circuits and try to > implement the basic parts of the topolgy in ktechlab. Most of the > schematics assume that the ground-symbol means "COMOMON" which is > distinct from "Earth", (which is a different symbol). > > Worse, Ktechlab inserts hidden earth-grounds where ever it feels like > it. In fact, every line of code in the simulation classes assumes that > these hidden grounds exist. I think if ktechlab were to adopt an "All > voltages add to 0" approach, the simulation matrices it generates will > be much easier to solve. > > (the battery circuit in the attached would have a +2.5 volt side and a > -2.5 volt side, equalling 0) > > Another major change to the simulation engine I've been thinking about > is the model for reactive components. Right now, ktechlab solves > reactive components seperately from regular components because of the > way the linear algebra system is coded. I think it would work much > better if reactive components such as capacitors and inductors > (including transformers) could request additional state variables in the > main simulation matrix for charge and magnetic flux, respectively. > > An issue arises when you have iron core inductors, in that they saturate > at a certain current... -- similar to how capacitors always have a > finite breakdown voltage. But neither of these issues is yet addressed > anyway. > > /me just tried ktechlab 0.3.6. damn that thing gets slow after only a > few minutes... =\ > > HTML document attachment (ground.circuit) > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ Ktechlab-devel mailing list > Ktechlab-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ktechlab-devel ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Ktechlab-devel mailing list Ktechlab-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ktechlab-devel
