Hello DJI team,

I've used the beta firmware for a while, and while the first release worked ok, the second had a couple problems with stabilization on my fpv drone. I believe they got carried over to the release firmware, as I've updated it yesterday and the problem still persists.

The drone is a Flywoo LR4, mount is this (https://www.thingiverse.com/thing:5033717), printed with soft tpu. I am using a FLywoo liionpack, and upgraded the vtx to a rush tank ultimate nano. Other than that it's stock, motors, props, frame, and pid, and it's very solid, no vibrations and resonance until 90% throttle.


I have a couple videos with wobbling after stabilization, and it ruins the footage. It looks to be mainly random tilts on the roll axis, and wobbling on the pith axis.

Attached is a raw video where the issue is shown:

https://www.swisstransfer.com/d/b2b9c165-c61e-42c1-9998-390fbbef4dcc

The first half is mostly fine, then at 00:02:21, after landing and taking off again while ascending there are small instabilities. As you can see in the unstabilized footage, there's quite a bit of turbulence, but i've seen worse with other cams getting filtered out. Then again at around 00:03:22 another wobbling issue, this time lighter.
This is the result: https://www.youtube.com/watch?v=j5sMuEs3lPE

Please note that i'm using a nightly build of Gyroflow (gh1109)

I'm really sorry, it looks like the upload is not properly working. I'll upload as soon as possible the video on another service.

Hello, there. Sorry for the inconvenience. We will consult with our teams first. Please let me know if you upload it again.

DJI Wanda Posted at 2-23 04:18
Hello, there. Sorry for the inconvenience. We will consult with our teams first. Please let me know if you upload it again.

Hello, here's the new link:


https://www.transfernow.net/dl/20230223ncx8bR7d

https://filetransfer.io/data-package/C3qxjFaA#link

dotSynergy Posted at 2-23 10:50
Hello, here's the new link:

Thank you. We have downloaded the video and forwarded it to our engineers. We will update here once we get the reply.

DJI Wanda Posted at 2-24 01:49
Thank you. We have downloaded the video and forwarded it to our engineers. We will update here once we get the reply.

I downloaded gyro data off the drone, if it can be helpful let me know so i can send it.

Hi dotSynergy.
We checked the video you unloaded.
As you said, the first part of video is fine. After the loading, it is assumed the bracket between action2 and the drone might loose by the impact when landing.
The action2 shifts in the rest part of fly. Since you set shutter speed 1/120sec, the shifts creat lots of shutter blur on the footage.
stabilization algorithm stables footage, unable to eliminate the blur on each frame , result in the wobbling .

Plz try to deal with holder of action2 on the drone: the fix the action2 to the drone closely.  That should help.

DJI-ytao Posted at 2-24 06:38
Hi dotSynergy.
We checked the video you unloaded.
As you said, the first part of video is fine. After the loading, it is assumed the bracket between action2 and the drone might loose by the impact when landing.

Hello,

thanks for your swift response.
I just checked the camera mount and it's very well fixed to the drone, however i will try to replicate the issue on another drone. Both mounts are made of TPU 95, so not very soft, but firm when the cam is inside.
The part that concerns me is the random tilt, as you can see the gyro data seems out of sync, and cannot be because of the gusts of wind as the drone does not tilt. That said, I'll try in the next days to take gather more data, and see if the issue presents once more, as it already did in another raw video i will be uploading soon.

Another example, on older footage (with second beta firmware) at around 1:15 and 1:48 there is light twitching on roll, even if footage is very stable before and after.
https://filetransfer.io/data-package/qVhDoDIu#link

dotSynergy Posted at 2-24 06:59
Hello,

thanks for your swift response.

Thank you for your reply. Please tell us your feedback after adjusting.