I like this. I am using evolutionary computing methods to modify flight behaviors, but they could also be applied to optimize aircraft models for whatever property that you want to optimize. The method is based on biological evolution (survival of the fittest and all that). This is how birds learned to fly and tuned themselves to their environment (why albatrosses have a different aerodynamic form and set of behaviors than buzzards, for example). With JSBSim you can parallelize and run simulations off-line on a supercomputer (no visualization, just the FDM), and then extract the optimized values. Anybody want to help me with this?
Mark Boslough Evolutionary Computing Department 9216 PO Box 5800, MS 0318 Sandia National Laboratories Albuquerque, NM 87185-0318 > -----Original Message----- > From: Tony Peden [mailto:[EMAIL PROTECTED]] > Sent: Thursday, January 02, 2003 5:26 PM > To: FGFS Devel > Subject: Re: [Flightgear-devel] Question on YASim .... > > > On Thu, 2003-01-02 at 14:58, Jon S Berndt wrote: > > On Thu, 2 Jan 2003 14:54:15 -0800 (PST) > > Gene Buckle <[EMAIL PROTECTED]> wrote: > > >My thought is that a real-time "model wrench" might make > it easier for > > >people to develop or improve aircraft models. > > > > > >I don't know of any other simulator that could do this, > but I don't know > > >if it's practical either. I think it would be fantastic if it was > > >possible. > > > > Hmmm. Cool idea. Of course, it would be sort of hard to > > modify table lookups for a complex coefficient, but if you > > start with a simple model you could play with coefficients > > in real time I think by using a property browser. Hmm. > > Hmm. Hmm. > > > > Tony? > > They are modifiable now to a certain extent. Each coefficient has > a gain and bias term that is applied like: > actual coefficient = gain*( file coefficient ) + bias > If the coefficient is given as a table in the file, then the "file > coefficient" value above is the result of the table lookup. > > These can be modified on the fly via the property tree, go to: > /fdm/jsbsim/aero/buildup/<axis>/<coeff name> > > This is a very effective method for tweaking one or two coeff's. > There is currently no way to dump the gain and bias values or > rewrite the config file though so you wouldn't want tweak too > many at once. > > > > > Jon > > Coordinator > > [EMAIL PROTECTED] > > > > JSBSim Project > > www.JSBSim.org > > > > _______________________________________________ > > Flightgear-devel mailing list > > [EMAIL PROTECTED] > > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > -- > Tony Peden <[EMAIL PROTECTED]> > > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
