Greg Richter wrote:

Our AHRS is $2195 for the whole enchilada, if you need an AHRS.  The BEI /
Systron parts are about $300 apiece in single unit quantities.  The PDA
folks are using these parts, as are we, as is Crossbow and I think just
about everyone else.  The trick to making them work is lotsa DSP math and
precise calibration.  It's a little off topic, but I'll be happy to talk
gyro-berdy stuff email if anyone's interested.

Be warned:  BEI gyrochips are VASTLY unstable with temperature, and are
ratiometric with voltage.  In short, to do a decent gyro implementation you
need to add a triad of silicon accels and both cut-out and erection logic
(no jokes now).  It's a known problem, but one where proprietary solutions
abound.

We'll have our performance curves up on the site shortly (I hope) assuming
the Webmaster gets it done soon.  These things are FUN!  Systron will have
new parts out in January that are more temp stable, and hopefully lower cost.

Stay tuned ...

-GR
http://bluemountainavionics.com
Plug, plug ...

 
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