Brian Wilson schrieb: > See http://www.trimble.com/tms/placer450.aspx?dtID=overview > > They use a small gyroscope. [...] > If you are walking around and want a reasonable position the Kalman > filter would probably be easier to deal with. > Is there a mathematician in the house?
I'm not a mathematician, but I think I have sufficiently understood Kalman filters and dead reckoning. A little known trick is to use ordinary integration with the strap-down equation given the accelerometer and gyro input, and have the Kalman filter model the error terms instead of the physical model state space. This way, you only have to update the Kalman filter every time you get a GPS fix, not every time you get a measurement from the other sensors. But... what are our chances GTA03 will have a 3D gyro? Andreas _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
