On Sunday 11 Oct 2009, Roy Vegard Ovesen wrote: > On Sunday 11 October 2009 14:04:19 Kishore wrote: > > Not having a common time base reference for the various > > subsystems can lead to varying performance based on the > > underlying hardware on which flightgear is run. The > > PID/Autopilot tuning for a given model should not vary based on > > the hardware on which flightgear is run. Should it? Or did I > > get this all wrong? > > The autopilot code "compensates" for varying frame rate by using > the delta-time between frames in the calculation of the > PID-controller output. Without this I believe that the autopilot > would have been quite unusable.
Certainly, it seemed to work this way at first, and as long as the rates required weren't too high, and the frame rates were reasonably steady, worked well. I think something has gone slightly askew somewhere along the way though, as some tests I did to dump out the data indicated some pretty wild swings. LeeE ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
