Re: [Paparazzi-devel] imu sensor filtering?

[Chris Gough]

The CG is on a lever above the plane of the dampeners. If you don't have room 
for another mass on a lever bellow, then you could:

 - fix dampeners above as well, maybe to a brace in the fuselage
 - raise the dampeners somehow so the are level with CG

Note the plane through the dampeners doesn't have to be horisontal, it just 
needs to pass through the CG for to make a zero length lever. Maybe try fixing 
dampeners to the bottom one end (as they are now), and at the other end move 
them to the top (maybe fixed to a bulkhead not the floor), so the line between 
dampeners passes through the CG on a diagonal.

Chris Gough

On 24/05/2013, at 3:13 AM, Chris <address@hidden> wrote:

> Hi
> The one in the photo had the lower plate bolted to the fuselage through those 
> holes visible so how can i add mass?
> I did tried adding a stage with dampeners and i found that it was actually 
> increasing the vibration level
> Chris
> 
> 
> On 05/23/2013 07:00 PM, address@hidden wrote:
>> In the picture of your vibration damping system, it looked like almost all 
>> the mass is above the main dampeners, and so is the IMU. Did you try it with 
>> equal mass above and below the dampeners, and the IMU in the same plane? 
>> Otherwise your dampening system could actually be adding a couple of 
>> harmonic resonances.
>> 
>> Maybe you have a metal plate or something I can't see in the picture, maybe 
>> it is balanced. Just an idea.
>> 
>> Chris Gough
> 
> 
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel