Cope with negative ESC rpms in notch filter #28309
Conversation
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@andyp1per The test flight that caused me to open the issue was done on Copter 4.5.6. Master has a different behavior: the logged filter frequency is negative for notches that are tracking negative RPM. I haven't read through the code enough yet to know what the filter is actually doing in this case. This is what it looks like on master: With your changes: |
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It doesn't look quite right, does it. We have made some effort to properly log what values are actually being used. |
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Actually, maybe it does look right. I'm just a little thrown by the weird symmetry of the ESC values - I wonder if there is something else going on there. Unless this is just split yaw. |
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Yeah I think it is fine. The symmetry is because the drone was yawing at the time (uncommanded; bad tune because this was default tuning params). Here are the logs from the above screenshots. |
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great! |
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My preference would be to just apply the abs in the ESC RPM method. Just so that -1 for a static notch still results in off rather than 1hz. -1 makes no sense for many of the sources. |
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IDK, this feels safer preventing negative numbers ever reaching the notches |
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@IamPete1 i'm OK with this change, but will delay merge for you to expand on your comment |
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