Vibration damper

[mlebret]

Hello,

With my new carbon frame, I experienced more and more vibrations, maybe due to bad balanced propellers (crash after crash). Finally, I found a way to filter them and have a smooth flight.

I first isolate the electronics box from the frame with exhaust silicon tubing sections with good result then added another level of protection between the box and the ArduPilot (fuel silicon tube). May have to adjust the Horizontal ref of the board, but the latest flight was OK.

MLB

[Honk]

Nice! The small silicon tubing to the flight board looks exactly as I did before only I mounted the screws on the frame plate a little more apart to make the silicon tubes go in a Z if you know what I mean, also a little longer silicon tubes would probably help as they are pretty stiff.

The big tubes and mounting of those underneath is just genious! Have you got sensor data and a flight video maybe?

[nemo4all]

The cd box bottom plate mount looks ok but your arduino mount doesn't seem good to me.....
You will have more vibrations with that mount...
Better is to mount the arduino directly to the CD box bottom plate...And let that bigger dampers be connected as they are...

[mlebret]

The big tubes and mounting of those underneath is just genious! Have you got sensor data and a flight video maybe?

I will fly tomorrow and try a new video (essentially stationary flight - sort off) to validate this setting. I have to hook the quad to computer to get sensor data. Could do that tomorrow also, a good occasion to verify PID settings.

The cd box bottom plate mount looks ok but your arduino mount doesn't seem good to me.....
You will have more vibrations with that mount...

I had a short flight with the bigger dampers only (good) and another short one with the arduino board dampers that was also OK. I will continue to fly with this config and alter it if necessary.

Thanks for the comment,

MLB

[Feliksayk]

Hmmm, I don't like the way that looks. You should at least attach the arduno to a small stand, like a piece of balsa wood or thin carbon fiber sheet and THEN attach that stand to the frame with 4 legs. Make those legs shorter and of rubbery material, such as sorbothane.

[CupOfTea]

I just found out about Vex a couple of days ago and spotted these mounts which look made for the job? Attachment 1239

they sell this adhesive polyurethane foam too

Not sure what to make of Vex? seems like good old fashioned Meccano with square holes....

[mlebret]

Here is a video of today's flight. The dampers are as on the picture above.

Still hovering in my garden, I have to find free open space to start translation. Not ready at this point. I may setup a buddy box to train with a rotary wing friend (He was able to fly the quad all over the soccer field at first contact - I trained him on fixed wing few years ago...).

MLB

[mlebret]

The cd box bottom plate mount looks ok but your arduino mount doesn't seem good to me.....
You will have more vibrations with that mount...
Better is to mount the arduino directly to the CD box bottom plate...And let that bigger dampers be connected as they are...

After some flights and software settings I mount the arduino directly on the CD box.

Thanks,

MLB

[Honk]

Looks stable enough! Seems the dampers were doing their work.

Any idea to use the same principle on smaller boards (I'm thinking Pro Mini/Wii Motion plus - 15g? compared to Duemilanove - 50g?)?
I have thought about small/thin O-rings but can't think of any good way fastening them to the boards/frame.

[CupOfTea]

How about - Needle and thread..... boy scout lashing.... then cement/seal with nail polish... like tying a Trout fly