We have a DJI 330 Frame, with e-flite 370 1200kv motors, 8x4.5 props, 20amp esc’s, 2200 3s lipo, and holybro pixhawk 4, running the 1.10v of px4.
We have added an extension to the frame, to mount the companion computer and the PDB (as you can in the picture). Total weight is 950 [gr].
For testing, we connected the quad to a steel frame with elastic bands to stop it from flipping and crashing.
Until we reach hover thrust everything looks fine, but when increasing the throttle slightly more, the drone starts to shake badly. When reaching 75% throttle, the shaking stops and it looks normal again.
At first, we tried testing without the bands and the steel frame, and the drone flipped at the hover thrust, and we broke 2 props.
Attached logged data from the flight controller:
Video from the test:
We are not sure if the vibrations are caused by a structure issue or a wrong PID or filters configurations.
Your thoughts are appreciated.
Thanks in advance,