<div dir="ltr">On Thu, Jul 31, 2008 at 5:28 PM, Andreas Bogk <span dir="ltr"><<a href="mailto:andreas@andreas.org">andreas@andreas.org</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<snip><div class="Ih2E3d"><br>
</div>I'm not a mathematician, but I think I have sufficiently understood<br>
Kalman filters and dead reckoning. A little known trick is to use<br>
ordinary integration with the strap-down equation given the<br>
accelerometer and gyro input, and have the Kalman filter model the error<br>
terms instead of the physical model state space. This way, you only<br>
have to update the Kalman filter every time you get a GPS fix, not every<br>
time you get a measurement from the other sensors.<br>
<br>
But... what are our chances GTA03 will have a 3D gyro?<br>
<font color="#888888"><br>
Andreas<br>
</font><div></div></blockquote><div> </div></div>Andreas,<br>Could the accelerometers be substituted for a 3d gyro?<br></div>