David Megginson said: > Ampere K. Hardraade wrote: > > > One explanation for the violent maneuvers that I thought of is this: as the > > distance between the plane and the waypoint decreases, the accuracy required > > in the course calculations increases. Since it takes time for the autopilot > > to respond, and takes even more time for the plane itself to respond to the > > commands of the autopilot, the plane will never align itself perfectly with > > the waypoint. Hence, the autopilot will keep trying to "catch" the waypoint > > until the very last moment, thus causing the violent maneuvers. > > Yes, that happens with student pilots as well -- localizers, VORs, you name > it all become very sensitive as you get close. > > > One solutions to the above problem is to pop the waypoint when the plane is > > still some distance away, thereby preventing the autopilot from making all > > those course adjustments. > > Or simply increase the allowable error at close distance, or use some other > kind of filtering function. >
There is a look ahead filter in the current autopilot code. It is being used to anticipate ILS radial interception for the 747. Maybe thrust control too. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
