HoverGames Drone Vibration Analysis w/ PX4 Flight Review - Don't Let Vibrations Kill Your MultiRotor
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- Опубликовано: 1 апр 2020
- I wanted to share the process I went through to deal with crazy oscillations with the HoverGames drone kit. The kit is solid but the foam tape that comes with it should not be used to mount the flight controller. I did some analysis using the PX4 Flight Review site and the awesome documentation provided here:
dev.px4.io/v1.9.0/en/log/flig...
Using the vibration foam that came with one of my old 3DR Pixhawk kits did the trick. This video shows the before and after results.
Thank you for this nice information sharing
that's a very informative video. Thanks
Thanks for your videos on the HoverGames drone. Keep them coming. I just ordered one myself. I also ordered their Rapid IoT device. Wanting to integrate it and a Raspberry Pi.
Chris, glad to hear that. I haven't seen their IoT device. What do you plan on doing with it?
Great video. Inspiring me to look closer at my flight logs
Good luck and keep us posted on how it goes.
Great work Dennis 👍🏻
Thank you Kilian. I hope you and your family are staying safe and healthy!
Dennis, have you ever done a test with adhesive tape instead of 3M foam? I've seen some examples that adhesive velcro eliminates vibrations a lot, I just didn't see the comparisons with other materials! You are great for these tests!
The oscillations one a drone are usually caused by two factors: a) unbalanced propellers and b) cables being not made tight.
Looking at your build you can improve a lot by fixing the GPS cable with zip ties close to the FMU at the frame, using sthe shorter GPS pole that is included in the kit and try to balance the propellers.
Thank you for the feedback, Gerald. Last week I ordered props from Master Airscrew and they came in yesterday. They appear to be of good quality. It's difficult to balance the self-threading props that come with the kit so I will give these new ones a try. I am using the short mast for the GPS but have not done anything with the cable. I like the way it handles just with the foam upgrade, but no reason I shouldn't take it a few steps further with your suggestions.
What do you mean by cables not being made tight Gerald?
@@MrSiciro He means loose wires that may be long that have extra slack in them. When a drone is flying this will cause unwanted vibrations when in the air due to wind and typical drone maneuvers. Best to secure them to the frame in some fashion.
I was always super nervous with the GH4 Zero UAV for work and it's folding legs. I think lading gear adds a lot of pendulum effect. You should check out the sub 250g Geprc drones your yard would be great for cruising around FPV.
Looking for any suggestions on "readily available" foam to try. When investigating it looks like silcone foam is thought of as the best vibration dampening. But if we can find a nice source maybe it could be updated in the NXP kit. I've seen some weatherstripping that seems really soft but dense as well. Maybe Air conditioner sealing foam as well. If anyone has suggestions i think i'll replicate what Dennis has done here and try a few of them.
I've sent a note to these guys: store.mrobotics.io/product-p/mro-pxfoams-mr.htm hopefully they aren't trying to charge $22.90 for 4 little pieces of foam. We'll see. Here is another source I may try: amzn.to/2Rc9tps
I have been thinking of trying "makeup sponges" that are typically available at a drugstore or dollar store. They seem like a nice mix of squishy and firm. Like tiny memory foam mattresses.
I'm also wondering how the actual placement of the foam/tape changes the vibrations. Large amount - all over the bottom vs tiny pieces in each corner. Lots of experimenting to do!
Would be interesting to compare the 3M foam with the little blue rubber mounts that come with some FCs.
Also, I have always wanted to know whether it is better or not to increase the mass of the “vibration filtered” components, maybe by attaching the rpi and the fc together and put them on the foam instead of only the fc...
Do you have a link to the blue rubber mounts? Not sure if I've seen those before. Thanks.
@@dennisbaldwin Actually there are "rubber mounts" already on the mounting plate. I think they are actually silicone, and often they are blue or other colors. On the HG drone they are black. My understanding is that they are typically a bit too stiff to filter exactly you're trying to do here. (The various colors i also think represent various stiffness-es.
How well is the pixhawk cube if we solidly screw it on the frame?