Right after 1340 seconds. Here is the APMPlanner screenshot about desired/actual pitches around that event.
Ah! there it is!
Looking at the timing of the events, it strikes me that this could be an issue of assumed versus actual servo position. Are your rigged for feedback?
Sorry here is one without the mouse over stats
There may indeed be some delay. But somehow I think something else is the main reason, and (possibly) slow servos are just making it worse.
The servos are advertised as “digital”, but I believe the difference is only that they can accept higher frequencies for input. There is no way to get feedback. Being crazy enough, I might mount some camera to look at one of these servos closely, but no idea whether this is worth it.
Alls you gotta do to hack a servo for feed back is solder an extra lead to the middle pin on the potentiometer and run it back to an analog input.
Check this out:
Sorry, what exactly to look at?
The predictive is going overboard during the pitch change, or at least that’s how I am reading the data.
If I get your idea right, this is too early, as the PIDP.Limit is not kicking in yet. I have seen that a lot on my CoaxCopters. Another symptom of that state would be the desired pitch changing despite having no stick input.
Still I have an impression that something nasty happens well before the extreme ranges. Maybe I am still over-actuating the pitch, or the maximum acceleration is set suboptimally.
Anyway, today I have one more flight with at least three similar events (the last ended with a crash), so there is more food for thought…
Well I will be right there with you here when my parts finish printing, that faulty ESC wrecked me bad lol; regardless, I had a problem with the center of mass that needed tweaking.
hi guys
im working on bicopter tilt rotor vtol similar to v22 osprey. At first i had used kk2.1.5 but now im planning to use pixhawk. can anyone help me out.
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