Once upon a time, you were sitting and writing:
> To avoid things getting very complex very quickly it might be easier to take a
> very simplistic apporach and model the batteries chief characteristics such
> as terminal voltage, and ampere/hour capacity.
> Since there is no such thing as a perfect power source you could go to
> much more detail - modelling the internal resistance of the battery and
> it's own capacitive and inductive load characteristics for example.
I think it's not really needed (after all, we may
end up writing pSpice within FlightGear... ;) )
I think the electrical systems for most small airplanes
have DC sources, so having capacitance/inductance for the
electric devices is ... I dunno... I don't think we need
this property yet (we probably seek for steady state analysis,
and not transient response of the system).
> But for the beginning surely we just need to
> know how what voltage it will supply and how much current capacity is
> available don't we?
Sure. That would be just about anything we need to
model/simulate for a start.
> Furthermore, if we need more accurate battery discharge modelling to represent
> the inherent voltage drop when the load approaches or exceeds the maximum the
> battery can supply in it's current condition we can have generic functions
> in code to model the behaviour and supply the values for the specific case
> from XML.
Hmm... we can either find an algebric expression (exponential functions
would do the work nicely), or use interpolation table (I know some
voltage drop diagrams... I have it somewhere in my intro. to Electronic
Devices lecture notes).
All the best,
Elady.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// //
(o)o) (-)-) booom !
( ._.) ( o)
> < > <
Elad (elady) J. Yarkoni
"Elady" for friends or....
"Oh my God... - It's Him !" for fans (or turbofans).
eMail: [EMAIL PROTECTED]
WWW: http://www.ee.bgu.ac.il/~elady
Dept. of ECE, BGU, Beer-Sheva, Israel, 84105.
972-8-647-2417.
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