Hi, our S500 drone suffered a bad crash while flying in offboard mode. When we tried to diagnose the issue by flying in position control mode only, the drone crashed again and was destroyed.
- Offboard control: https://review.px4.io/plot_app?log=cdcd46dd-2910-47a9-a646-cc0864cde85a
- Position control only: https://review.px4.io/plot_app?log=d60c21bc-0d2f-4490-8f00-6d8e8b34e26a
Click here to go to the Google drive folder containing the logs
Crash #1 (during offboard mode) might be blamed on our ROS control code. Therefore we repeated tests in position control mode only and suffered Crash #2, which ruled out errors in ROS control code. What is common in both crashes is many primary EKF changed [012] (filter fault) -> [012] messages. Visually, both crashes appeared to be due to the motors slowing down dramatically midflight.
A later flight test with an identically setup vehicle was safe and successful in both offboard and position control modes.
- Frame, propulsion: Holybro S500
- Autopilot: Pixhawk 4
- GPS: MRobotics M8N
- Companion computer: Jetson Nano
Any help in diagnosing these crashes are greatly appreciated! Crash #2 was very alarming as it happened during regular position control mode, on a vehicle whose setup has been working fine for the past year.