Why 2 accelerometers?
openmoko at mazikeen.demon.co.uk
Fri Sep 18 17:05:14 CEST 2009
On Friday 18 September 2009, RANJAN wrote:
> I was wondering why FR has two accelerometers.They could have one 3 axis
> accelerometer and a single angular rate gyro.How is a combination for 2
> accelerometers more useful than one 3 axis accelerometer and a gyro?
Or, better, use a 3-axis magnetometer instead of a gyro.
At the time the FR was designed, gyros were significantly more expensive and
less available than accelerometers, and magnetometers were large and even more
expensive. Spaced accelerometers sounded like a good way of getting most of
the way there while still being affordable. In practice it doesn't work so
well. In the meantime gyro and magnetometer prices have tumbled.
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