How to settings notch filter for this case?

jiratto · April 22, 2023, 4:00am

I found issue that my drone has high vibration on Y Axis about 15++ m/s^2.
So, I measure vibration with IMU Batch Sampler.
.

How to settings notch filter for this case ?

Thank you.

Firmware : Arducopter 4.2.4
drone : motors 1200kv 4s 7inch

jiratto · April 22, 2023, 5:20am

This is my log.

jiratto · April 22, 2023, 7:45am

This is my vibration.

dkemxr · April 22, 2023, 2:40pm

Strange that in this log (-40) you don’t have IMU checked for logging so Vibe data isn’t available but you show it in the next post. Anyway, target the peak at 110Hz for the Notch Filter. That will take care of 3 harmonics. There is one ~270Hz that will likely be gone from the low pass filter but you will have to see. A static notch is possible for that if it’s not.

jiratto · April 22, 2023, 4:08pm

Are settings correct?

INS_HNTCH_ENABLE,1
INS_HNTCH_MODE,1
INS_HNTCH_REF,0.176
INS_HNTCH_FREQ,110
INS_HNTCH_BW,55
INS_HNTCH_HMNCS,3

dkemxr · April 22, 2023, 4:14pm

Yes. Set this too:
INS_HNTCH_FM_RAT,0.75