Pixhawk Actuator Control/Outputs oscillation

Pixhawk
1

There seems to be a problem with the actuator outputs provided by the Pixhawk. The graphs clearly indicate the situation, with the actuator outputs being incredibly noisy. This reflects on the Pitch Angular Rate graph (added below as well). Please help us understand why this noise/oscillation is present, and how we can go about mitigating it. Some details about my rotorcraft have been added below -

  1. Currently just an aluminum frame with 8 VTOL motors mounted, using the default Octo Coax Wide airframe.
  2. Flight Stack - PX4
  3. Autopilot Controller - Pixhawk V1
  4. GCS - QGroundControl

Flight log (that these graphs have been taken from) - https://logs.px4.io/plot_app?log=f078f5dd-6772-43b0-a696-d2591f32a45f

Actuator%20Controls%20
Actuator%20Controls%20840×336 26.9 KB
Actuator%20Controls%20FFT
Actuator%20Controls%20FFT840×336 55 KB
Actuator%20Outputs
Actuator%20Outputs840×336 32.5 KB
Pitch%20Angular%20Rate
Pitch%20Angular%20Rate840×336 35.9 KB