Hello guys,
I was flying my IRIS quad on Loiter today when a battery failsafe triggered and the quad went into RTL mode as configured. Instead of going back to base, however, it started climbing like crazy with no signs of stopping. I tried going into stabilize but the quad still climbed. I ended up pulsing the throttle from zero to the middle, dropping the quad a few meters each pulse, until it reached safe crashing altitude - And crash landed (just a broken prop - woo!)
The iris was flying with a cell phone attached to a camera - about 270 grams. The phone was on flight mode (ha ha) so I don’t think it was a phone call or anything like that.
Here’s the log of the flight:
The log shows that right after the battery failsafe started the Z vibrations peaked for constant periods of time that fit well with the failsafe beeps - Could it be the failsafe beeps causing the Z accelerometer vibrations? Maybe it’s a resonance issue?
If not, what could have caused this?
The Pixhawk is a 3DR original Pixhawk, and it’s closed in its case. I haven’t tried looking on the Pixhawk board yet.
Thanks
Nitay