Has anyone gotten "speed-with-pitch" autopilot mode to work properly using only PID controllers? (i.e. without outside help from the xmlauto internal code or some other system)
I don't see how the speed-with-pitch controller in FlightGear's generic autopilot can work even in theory. The first stage of the cascade assumes knowledge of the airplane's pitch angle, whereas the actual pitch angle could vary a lot. For example, I could be climbing at 250 knots with 10 degrees pitch, or I could be descending at 250 knots with -2 degrees pitch. If my speed increases to 255 knots the pitch in the first case should increase to about 12 degrees, and in the second case should increase to 0 degrees. It seems to me the autopilot can't chose the correct pitch angle without some knowledge of the current pitch angle, or the airplane's performance. Dave -- **************************** David Culp [EMAIL PROTECTED] **************************** _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
