Quoting Electron <electron2k4@infinito.it>:


Hi, e:-

Are you sure that your accelerometer is not clipping in any axis
under vibration + gravity conditions?

--sp


> Hi,
>
> On a 3-axial accelerator I compute the magnitude by simple =20
> Pythagorean theorem
> in 3D, i.e. Mag=3Dsqrt(AccX*AccX+AccY*AccY+AccZ*AccZ)
>
> It is an analogue accelerometer with significant RC filters between =20
> its 3 analog
> outputs and the PIC ADC.
>
> Leaving the accelerometer stationary, whatever the inclination, I =20
> measure 1.0g
> of course.
>
> But in the presence of strong vibrations, I measure a mean magnitude =20
> of more than
> 2.0g!
>
> Is this theoretically even possible, or should I bughunt it? If it's =20
> the filters,
> then I thought that the vibration would cancel out thanks to them, =20
> was I wrong?
>
> Cheers,
> Mario
>
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--=20
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