Re: [Paparazzi-devel] Reply to : Lisa/M Aspirin IMU Vibration Problems

[Simon Wilks]

I know this might introduce other issues but has anyone tried inverting the motors to remove the effect of prop wash on the frame? Here is a video of someone who tried this: http://www.youtube.com/watch?v=UkobGpBz4Pg

Another type of foam you can try (I tried this on a small fixed wing airframe after hearing it works well) is to use Tempur foam. They send free sample kits that include a chunk of foam which is more than enough: http://www.tempurpedic.com/our-company/information-kit.asp

On Fri, Feb 24, 2012 at 11:28 AM, Chris Wozny <address@hidden> wrote:

Chris,

Unfortunately our aircraft is on the order of 100 grams and the
fuselage is only about 1 cm deep with the area of a credit card which
makes room for large mass and large size hard to come by. I think for
now I might try and mount it on the outside of the aircraft using
Christophe's method of four 4x4x10 mm pieces of packing-foam on the 4
corners of Lisa/M. But the best solution would be to check and see if
the props and motor is balanced and then isolating it with rubber
washers maybe.

- Woz

On Fri, Feb 24, 2012 at 1:55 AM, Chris <address@hidden> wrote:
> Hi.
> Have you tried to mechanically dampen the vibrations?
> I use 3 piece damper
>  The imu is mounted on top of a heavy iron piece which sits on top of soft
> foam which is glued on a flat
> piece of aluminum
>
>          .....................             IMU
>    _____________________
>    |____________________|       iron
>    =============
>    =============        FOAM
> -------------------------------------
> -------------------------------------  Aluminum sheet
>
> Chris

_______________________________________________
Paparazzi-devel mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/paparazzi-devel