HelloI made around 30 flights with a delta wing uav with a weight about 25kg. APM 2.5 fm 2.68So the plane was tuned at about 30m/s in horizontal cruise flight.So when i start descent from waypoint…Continue
Your aircraft and launcher are superb! If you have a link to it being launched or flying, it would be greatly appreciated. Is it constructed of foam and, are those slick/slender wings causing your oscillations at high speed?"
"We don't have much information about you UAV except that is must be big and heavy. The oscillation can just as well be a mechanical problem with wing flutter caused by excessive airspeed. If so no amount of PID tuning will prevent this, and you…"
That's pretty interesting. So the effect of a control is (about) proportional to the square of the airspeed?
Try change it! I suppose you could find critical P values at 3 different airspeeds and that should give you all you need to…"
Thank you for your repley.
I did that already.
I saw in the code there is a airspeed scaler. but the gains should be corrected with differential airpressure ant not air speed. differential air pressure or even airspeedˆ2.
What are you…"
"What do you mean by oscillating with respect to your aircraft?
If you mean roll or pitch oscillations then try reducing the corresponding Proportional gains a bit to make it less sensitive at higher air speeds."
HelloI made around 30 flights with a delta wing uav with a weight about 25kg. APM 2.5 fm 2.68So the plane was tuned at about 30m/s in horizontal cruise flight.So when i start descent from waypoint one to waypoint to- distance between waypoint one around 1500m and a change of alt about 300mthe airspeed overshoots and the plane starts oscillating. Even when i turn the airspeed pitch PID to zero.What i figured out is that the plane gets to fast during descent even when the engine is almost…See More