Re: [Paparazzi-devel] Using Thermopiles for AHRS on Lisa/M instead of IMU

[Eduardo lavratti]

OPSss ... i think something wrong here.
I have a mikrokopter board with piezo gyros and with new mems gyros.

The board with piezo gyro is much more sensitive to vibration than the board with mems.
i fly MK´s for more than 3 years and tested this board with tons of gyros.

> Date: Tue, 3 Apr 2012 09:28:43 +0200
> From: address@hidden
> To: address@hidden
> Subject: Re: [Paparazzi-devel] Using Thermopiles for AHRS on Lisa/M instead of IMU
>
> Dear Chris,
> piezo gyros are normally more vibration resistive than silicon gyros.
> For example, the mikrocopter use only rubber damper when silicon gyros
> are used.
> The active (swinging) material in piezo gyros has 10..100 times grater
> mass than in silicon gyros.
> Fubata use special kind of damper material (flame).
> It is also possible that one of your sensor chips has a failure.
> You can spend 56 Euro to by a sparkefun IMU with the same chips and
> test again to prove this.
> The IR AHS works, but has shown same failures in cloudy and wet
> weather conditions.
> Sometimes it is a very hard and frustration work to get success.
> I hope that you fly with paparazzi soon.
>
> regards
>
> Heinrich Warmers
>
> Chris Wozny schrieb:
>
> >All,
> >
> >For reasons outside of my power (trying to dampen vibrations in tiny,
> >tiny aircraft leads to massive hair loss and frustration) I've got to
> >resort to using IR for the AHRS on our aircraft instead of Aspirin
> >v1.0. We're using Lisa/M and I was wondering: are there any default
> >assignments for which ports to use for thermopiles like with Tiny? The
> >wiki says there should be, but I have a feeling Lisa was designed
> >without thermopiles in mind since an IMU would work much better.
> >
> >Also, why do analog gyros (more specifically Futaba Mini Piezo gyros)
> >work great for stabilizing the same plane with the same vibrations
> >that cripple the use of Aspirin v1.0 for AHRS?
> >
> >Best,
> >Chris
> >
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> >
> >
> >
>
>
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