I’m flying a Holybro S500 quad, the quad it self is very stable and has good performance, but when I read the log files I see a borderline vibrations:
The pixhawk flight computer is mounted on damping foams that comes with it, and no cables or other hardware are interfering it.
There are no loose or shaking parts on the drone, everything is tight and rigid.
I have lowered imu_gyro_cutoff parameter to 40hz down from 60hz (Default value for S500) and it helped to the vibration problem.
I spent quite a lot of time on analyzing logs, but I cant figure out the cause of the vibrations, perhaps someone with more experience could throw a bone.