[Gta04-owner] Inertial measurement unit

[Rainer Blome]

 > Do you know any open projects of creating an IMU, or any links
 > that would help to understand the math behind it?

The key search term here is "inertial navigation".
Combining it with "android" is a good start,
it will lead you to an existing implementation:

http://www.instk.org/
 From there, you'll reach a blog and an associated thesis.

Not surprisingly, it uses Kalman filters.
Alas, none of my phones has enough sensors to fully try it.

Rainer