"Hi Bill,

I am currently trying to solve the following issue but do not seem to make much progress, and was hoping you could maybe shed some light on the subject (will be looking into it again tomorrow).

I am implementing the DCM algorithm for use…"

"Hi Bill,

Looking at the offset correction in the MatrixNav code:

zaccel.offset = zaccel.value - 2*GRAVITY ; // GRAVITY is measured in A-D/2 units

and

gplane[2] = ( zaccel.value>>1 ) - ( zaccel.offset>>1 ) ;

... the following struck me.

Say you…"

"Hi Bill,

I read in the posts and PDF guides that you experienced some problems with high frequency signals on the gyros (for instance when you tapped against the gyros). You solved it by oversampling at 5kHz, low pass filtering and decimation. BTW,…"

"Hi All,

Has anyone out there tried to apply the DCM approach to a terrestrial vehicle (car, bus, etc.) to determine pitch and roll while driving (these angles would of course include both the road attitude and vehicle attitude relative to the road…"