The only constant acceleration is the acceleration of gravity. A "leaky
integrator" with a 2 or 3 second Tau should work fine.


How so? the plane doesn't know if it's right side up or not.
You can do a barrel roll, or loop and always keep "down" through the
bottom of the seat.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com


Roger

That's a good question. I have run every other scenario over in my mind, and
it looks to me that the proposed system should deal with them under any
normal circumstances.

However, I had not considered a constant acceleration "barrel roll" while
maintaining the same heading.

How to sense that???
My original idea had included an electronic "Gyroscpe"

I had eliminated it when I discovered how hard the iMEMS ADXRS300
http://www.analog.com/en/prod/0,,764...S300%2C00.html
are to get, but I may have to put it back.

A homemade version is available.
http://home.comcast.net/~scottxs/pie.../piezindex.htm