INS gyro alternative or enhancement

Have you investigated the Analog Devices AD22151G?

In article <pNWdnfZVrcQV_UXfRVn-2w@rcn.net>, Jerry Avins <jya@ieee.org> wrote:
>glen herrmannsfeldt wrote:
>
>   ...
>
>> There is also a piezoelectric based gyro that works using the coriolis
>> force.  A piezo crystal vibrates in one axis, say X, and a piezo 
>> detector detects vibrations in the Y direction.  If the device rotates 
>> around the Z axis the path won't be pure X anymore, with a Y component 
>> proportional to the rotation rate, and relative phase depending on the 
>> direction of rotation.  It is likely that some drift will need to be 
>> nulled out if the two aren't exactly perpendicular.  I have heard that 
>> this one is used in car navigation systems with GPS correction.
>
>Presumably, that's how a housefly's halteres work. The analogy is 
>complete if you consider nerve impulses generated by pressure to be 
>piezoelectric in origin.
>
>Jerry