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Open Source Flight Controller Firmware
GNU General Public License v3.0
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Add 4th Harmonic RPM Filter option #13444

Closed ChrisRosser closed 2 weeks ago

ChrisRosser commented 2 months ago

Is your feature request related to a problem? Please describe

For biblade props there can be a significant harmonic at 4x the RPM frequency. This noise gets through the exisiting RPM filters.

Raw Gyro

image

Filtered Gyro

image

Describe the solution you'd like

Add an option to increase the number of RPM filters from 3 to 4 if possible within CPU/RAM constraints.

Describe alternatives you've considered

Dynamic notch is a possible fix but will never be as effective as a 4th RPM filter.

Other information

No response

ctzsnooze commented 1 month ago

There's a harmonic, but is it significant? It's such high frequency that almost any low-pass would be very effective and low-cost.

github-actions[bot] commented 3 weeks ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs within a week.

github-actions[bot] commented 2 weeks ago

Issue closed automatically as inactive.