Hi,

On a 3-axial accelerator I compute the magnitude by simple Pythagorean theo=
rem
in 3D, i.e. Mag=3Dsqrt(AccX*AccX+AccY*AccY+AccZ*AccZ)

It is an analogue accelerometer with significant RC filters between its 3 a=
nalog
outputs and the PIC ADC.

Leaving the accelerometer stationary, whatever the inclination, I measure 1=
..0g
of course.

But in the presence of strong vibrations, I measure a mean magnitude of mor=
e than
2.0g!

Is this theoretically even possible, or should I bughunt it? If it's the fi=
lters,
then I thought that the vibration would cancel out thanks to them, was I wr=
ong?

Cheers,
Mario

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