Hi, I am pretty sure this has nothing to do with v.4, but I didn’t know where to put my topic.
After a small break from the hobby, I decided to reflash my old F550 and do a new configuration, as I have never really been satisfied with my configuration.
My F550 experienced had a near death experience, after a successful autotune. I did an autotune with all settings as described as the documentation suggest, and the aggressiveness of the autotune set to default. Everything went great and I was pretty happy with the tuning. It flew very well. It was a calm evening.
But when I decided to do a fast descent which I did notice was a bit unstable, it almost went wrong. When I raised the throttle to maintain the altitude the vehicle started banking from side to side (90* bank angle, to 90* bank angle opposite) for a looooong time (seemed like forever). I went into panic and accidentally hit landing gear switch, tried to change mode, but nothing helped. The autopilot kept things in “control” and suddenly it went into a stable hover…
I have attached my log file and parameters, if anyone could give it a look, and give suggestions for what to change, it would be appreciated. Do I need a more/less aggressive autotune? I know I could change the decent rate but it wasn’t even going that fast so I would prefer to fix the problem, rather than hiding the problem.
Hardware:
DJI F550 frame
Tmotors (MN3110-15, 780kv)
10" master airscrew props
Cube Black (with all imus running (mask set to 7)
Mauch PSU
Here GPS
SimonK ESCs (working fine, never had desync)
5000mah 5s graphene lipo battery.
Any help is appreciated. Thanks…
Log and parameters:
https://drive.google.com/drive/folders/1LwYMlUnNhGwd79mzf-Vfkh1PL7m4SAFI?usp=sharing