Am So 18. Mai 2008 schrieb [EMAIL PROTECTED]: > Instead of adding a compass to the device to be able to read spin about the > gravitational axis, would it not be easier to offset one of the > accellerometers from the centre of the device? > > That way, the roll is uneffected and the yaw and pitch can be calculated by > accounting for the known offset in the equ.
With 2 g-meters you always have an axis through both of them. It's hard to distinguish rotation on this axis from linear acceleration also deviating the g-vector direction. Though linear acc. will inevitably change length of vector, whereas with rotation the g always stays with natural g of earth. Anyway, to get somewhat exact real 3 axis rotation info even in deep space where no earth-g to be seen anymore, you need a set of gyros or at least 3 g-meters mounted non-aligned and far from each other. /jOERG _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
