Re: [Paparazzi-devel] imu sensor filtering?

[Prof. Dr.-Ing. Heinrich Warmers]

Hi Chris,
do you think that you can fly with the old IR sensors?
If you don't fly in clouds, fog, rain or small valleys it works well and has no problems with vibrations.
Perhaps this is also a solution to test damping in real flights.
Have you used a hydro mount system for the combustion engine?
Same vibrations can also be transported by the air.
Good luck with yours experiments.

Heinrich
Chris schrieb:

After some more testing i moved the imu all over the fuselage in order to try to find the quietest spot
and i did found it on the plastic floor of the airplane.
I also added another dampening level so actually i made a pyramid with 3 levels
and every level is dampened, this moved the vibration level of the x and y axes to below 1m/s peak to peak and the z axis below 2m/s pp.
Next thing i want to try is "Rtom Moon Gel Damper Pads".
One last thing, the airplane has totally different vibration characteristics when on the ground and flying.
>From my tests i found that the z axis vibration magnitude was analogous with rpm while the airplane was on the ground but inversely proportional when flying (smoothing out with increased rpm) like the two other axes x and y which were smoothing out with increased throttle both on the ground and in the air.
The landing gear probably contributes something to this behavior.
Chris
 

On 05/21/2013 05:36 PM, address@hidden wrote:

Plotter is in m/s2

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