Hi Jon, I think it makes sense to clamp the integrated value in any PID regulator. Due to the fact, that for a PID-regulator the output is clamped, the integrator should be clamped to a value, which is sufficient for reaching the maximum allowed output (even if the D-part is working against the I-Part). the below mentioned change would reduce the problem, but due to the not exactly 1G load for any runway in the world, the problem would still occur after longer times on the runway.
Maik Jon S. Berndt wrote: >>> One way to reproduce: >>> >>> - start fgfs with --aircraft=f16-3d >>> - apply parking brakes >>> - wait 10 minutes >>> - fly and die (elevator pulls *strongly* up) >>> >>> m. >>> > > I think I see at least one problem. The pitch channel integrates load factor > error. Sitting on the runway, I see that a normal 1G load, multiplied by a > 0.125 gain, and that is getting integrated. I believe that the load factor > to be integrated on the runway should be zero - that is, in trimmed flight > the integrator should not have any error to integrate. I'm looking into > that, now. > > Jon > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel