Mikrokopter MK ANTI VIBRATION PLATE, would this work ?

[jetforce]

Hi I`m going to put MK with Aerodrive 8 on my new SkyJib 8, so reading a lot on the german MK forum about Atti and PH not working so well.

I got an idea.

Everybody has the same problems with MK systems, the 8mm or 15mm rubber-dampers
takes all the high frequence vibration from the motors and props. But they
are too soft so that the hole board can move too much. That meens that the
Copter is not holding Atti and PH as well as we want it to.

MATERIALS NEEDED:

Two of those : cap for GPS-Cover 64 https://www.mikrocontroller.com/index.php?main_page=product_info&cPath=65&products_id=410
8 x : Bolts M3x8 https://www.mikrocontroller.com/index.php?main_page=product_info&cPath=77&products_id=280
8 x : Screw M3x8 black ( it has to be with a Y head so it can be sunked into the board/cap.)
1 square of gyrotape or better Alpha-gel 3mm.

First attach 4 bolts and screews to each board/Cap.

Then glue the two plates together with gyro-tape or alpha-gel 3mm, with 4
bolts pointing up and 4 down for attaching to the frame (bolts down)and MK
tower (bolts up)

This will isolate the vibrations like we nomaly do on RC Heli-Gyros, and
make the hole MK tower stable, so no wobbling.

I would like to hear your opionion on that.

 

[jes1111]

The fundamental problem with isolating the FC from vibration is its low mass, which calls for extremely soft material. But soft material means that it will move about in response to translations. And the actual damping performance is likely to be be poor anyway for such a low mass. So IMO the best solution is to increase the mass to be isolated, i.e. mount the FC and as much other stuff as you can find (like a battery - that would be good) on a sub-plate and then choose vibration isolators that have a chance of being effective for that higher mass.

 

[jetforce]

You`r absolutly right, that`s why I was thinking of using 3mm alpha-gel between the two plates, perhaps make the upper plate heavy, but I think the problem is to find the right amount of alpha-gel between the plates. And of course everything (motors and props) has to be perfectly ballanced

 

[jetforce]

Here first tests with Alpha-Gel.

View attachment 3326View attachment 3327View attachment 3327

TEST IS DONE WITH A OLD MOTOR WHICH IS MADE UNBALANCED

Here test on baseplate with out Alpha-Gel View attachment 3328

Here test on AntiVibration plate with Alpha-GelView attachment 3329

 

[DKTek]

Nice results Lars. That's a lot of expensive gel, but looking at how it works it would be worth it.

You guys mention increasing the mass... What about rigging the stack with rigid stand-offs to the AeroDrive 8 and supporting the AeroDrive 8 with the rubber stand offs? The AeroDrive 8 is heavy.

 

[Bartman]

i hate to rain on the parade but I just don't see this as necessary. GPS PH works great if you leave the GPS gain on a radio channel so you can adjust it for each day's winds. As far as stability goes, it's so perfect it can't be any better!

just kidding but I think you're expending a lot of effort for something that already works great. then again if you've got to experiment, have fun and let us know how it works out.

Bart