Hi, today I fly my VTOL (just in MC mode) to test its behavior. I experienced some bad behavior and analyzing flight logs I can find some strange things but I can’t find out its cause.
First flight: https://logs.px4.io/plot_app?log=68b4c82f-be67-40ea-ab34-64f409cb5762
In the first flight when flying in stabilized mode one motor stopped spinning (see MAIN OUTPUTS) without any apparent reason. Analyzing yaw angular rate I can see a big gap between setpoint and estimated. It happens about 4:20 minute, and it coincides with the motor stopping.
Second flight: https://logs.px4.io/plot_app?log=d751eae7-7008-4029-b6d8-03aedc09b722
During second flight, same behaviour occurs but this time it leads to a fatal crash. In logs I can see warnings saying (Remaining sensors after failover event 3: Mag #0 priority: 0) but I can’t find what it means.
After all, I want to know if anyones knows what could happen and how to prevent this in future flights.
Additional data:
- I was using pixhawk cube and internal magnetometers where deactivated to avoid magnetic interference, so only the GPS magnetometer has been used.
- Airspeed sensor shows negative velocities which I could not interpretate. Maybe in MC mode the propellers can produce any kind of aerodynamic interference with airspeed?
Thank you in advance for your comments.
