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: 9755

Tags: 2.9, Accel, Dampening, Inertia, Isolation, Vibration


Wiki Ninja
Comment by Gary McCray on February 16, 2013 at 3:18pm

Here is a direct link to the ArduCopter Wiki Vibration Control Section:

http://code.google.com/p/arducopter/wiki/VibrationControl

Comment by Tim Green on February 16, 2013 at 4:00pm
I used 1/4" foam and get < +\- 2.

Developer
Comment by Max Levine on February 16, 2013 at 4:36pm
Comment by Josh Potter on February 16, 2013 at 6:09pm

Good idea Gary.  I'll upload the results of my testing with the moon gel (worked great on a heli).

What's considered a normal flight?  Stabilize, zipping around, loiter?


Developer
Comment by Randy on February 16, 2013 at 6:13pm

the content looks pretty good but a couple of suggestions on layout:

  • keep it concise - I suspect that 80% of people will only read the first 1/2 page so try and get the most important advice in there.
  • move the pictures up (people will more likely read it if the ratio of pictures to words is higher)
  • include links to where they can actually buy the stuff they need
Comment by Tom in NOVA on February 16, 2013 at 6:35pm

I was looking for some good tips for my current build, good timing and thanks for starting a one-stop shop for vibration elimination tips.


Wiki Ninja
Comment by Gary McCray on February 16, 2013 at 6:37pm

Hi Randy,

I do know that concise is not my strong point.

I fully agree with and respect your comment though and will work at it.

In the meantime, I agree completely about the 80 percent of the people reading the first half page or so and will reorganize it as you suggest.

I'll move the Quick Fix stuff to the top with the pictures and put the Log walk through Immediately under it, then the rest of the more theoretical and development oriented stuff after that for those who want to go all out.

I was already planning to provide links to specific material sources and information, but I will kick it up a notch on my to do list.


Wiki Ninja
Comment by Gary McCray on February 16, 2013 at 6:43pm

Hi Josh,

Good question.

The most important circumstance we need to get flight log vibration information from is a stable hover.

For camera use generally a Multicopter is not flown acrobatically and so the flying G forces are pretty light and vibration information from a hover will suffice.

However, for all out acrobatic or high speed maneuvering flight the G forces placed on the copter might exceed the relatively benign conditions encountered in a hover.

If this is the case you might want to produce a flight log which incorporates flying to this extreme envelope and then analyze the vibrations at that point in the flight where the copter was subjected to those extreme maneuvers.


Wiki Ninja
Comment by Gary McCray on February 16, 2013 at 6:58pm

Hi Max,

I had already looked at your O-ring mount Blog (excellent pictures by the way).

It is quite similar to the way that my F450 FlameWheel is mounted.

I discovered that a much shorter coupled (Board closer to the standoffs) method worked noticeably better.

It permits less initial O-ring tension while rapidly increasing tension and dampening with the smallest possible board movement it also prevents unnecessary board tilt or motion.

That said, this is the  traditional O-ring suspension method and it certainly provides results sufficient for inertial navigation.

Just close coupling works better.

I am going to be ordering a bunch of assorted 1/16" Silicone O-rings soon in assorted diameters and they should work better than the Buna-N ones for dampening as well.

 


Wiki Ninja
Comment by Gary McCray on February 16, 2013 at 7:14pm

Hi Again Josh,

I Googled Moon Gel and definitely would like to know your results with it, looks like a really exotic substance, and should be interesting.

Comment

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