Vibration Control Wiki Section Started for Better or Worse

I Have inserted the starting pass at a much needed section on Vibration Control in the ArduCopter Wiki and would very much like feedback for corrections or additions from you all.

This is  the close coupled mount that I use on my little F330 Flamewheel.

To achieve this plus and minus one tenth G vibration dampening.

In any case, please review the Vibration Control Wiki section under Assembly and give me some (constructive) feedback.

Thank You,

Gary McCray

Views: 16613

Comment by Gary McCray on March 27, 2013 at 9:51am

Hi Stephen, I think it might be better to start with the single layer of the Moon Gel, or use two layers of Moon gel with 2 layers of regular double sided tape and only one (maybe in the middle) of the 2 sided foam tape.

Just a thought; Your actual results will be borne out by your Accel graphs and flight performance and you should try several combinations to see what actually works best.

Don't forget to enable RAW in the logs so you can record the Accel readings.

Which I would very much like for you to publish here if you don't mind.

Comment by Gary McCray on April 20, 2013 at 9:25pm

Got the Vibration Control section of the Wiki rewritten and installed to the new Wiki Here: http://copter.ardupilot.com/wiki/vibration-damping/

Take a look and let me know what you think, good, bad or corrections.

Comment by Gary McCray on April 25, 2013 at 12:42pm

Hi Thomas, Now that we need vibration damping I do think in the end 3DR is going to have to provide an adequate solution.

How engineered versus trial and error remains to be seen, but if it works and is sufficient, nobody will care.

It is amazing to me the difficulty people have understanding the whole appropriate damping / isolation solution for the size of the mass of the flight controller thing, it is really the most basic consideration.


MR60
Comment by Hugues on April 25, 2013 at 12:53pm
@gary, an idea: why don't you build a third ant vibe stage by mounting your fc on the fiberglass plate with 4 rubber "stand offs" dampeners. Same as those i used for my camera gimbal.
I would be interested to see the results, would be a first three stage dampened fc

MR60
Comment by Hugues on April 25, 2013 at 12:55pm
Here a link to those rubber dampeners i am talking about: http://mikrokopter.altigator.com/dampening-antivibration-c-58.html
Comment by Andrew Chapman on April 25, 2013 at 3:51pm
@Hughes - that was my solution, I just put those 12mm rubber spacers at the bottom of my stack and got sub 0.1g accelZ, so I'm not sure why people are going to such extreme lengths.

Damping the whole stack that way is simple, uses the mass of the stack to best advantage and keeps most of the wires together on the damped side. Perhaps people aren't balancing their props and so need to do more extreme vibration control at the APM, but really you should fight the vibes at the source

http://www.canadadrones.com/Anti-Vibration-spacer-M3-x-12mm-p/vib-m...
Comment by Scott Berfield on April 25, 2013 at 4:05pm

That's pretty much what I have on two of my Quads. The third is o-rings with memory foam. All three exhibit no issues with Z vibes.

Comment by Gary McCray on April 25, 2013 at 6:17pm

Hi Hugues and Andrew and Scott,

I just happen to have 4 of those very dampers at least if they are the same ones that 3DR sells and they look just like them.

I hadn't expected much out of them because they are very hard in comparison with the mass of the PX4 boards.

Which is why I hadn't put them in - Pretty lame, I know.

With all these testimonials it certainly does  seem to make it a worthy undertaking.

So, I will give them a try on my PX4 F330 Flamewheel which is nearly ready for lift off.

I really hope you are all right and if you are I will definitely re-evaluate my position on these.

And I will report results here.

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