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[Paparazzi-devel] Compensating for drift in inertial autopilot

From: Adam Williams
Subject: [Paparazzi-devel] Compensating for drift in inertial autopilot
Date: Wed, 27 Dec 2006 02:47:31 -0800
User-agent: Thunderbird 1.5 (X11/20051201)

So I'm putting together a shopping list for a helicopter autopilot based on,, <> and anecdotal information on the internet. Sorry but can't find any implementation notes on

Hovering a helicopter seems to require a 3-axis accelerometer and a 2-axis gyroscope. claims they hovered a helicopter on just this information.

One problem isn't being addressed anywhere: How do the autopilots compensate for the drift in the gyroscopes? Do the accelerometers compensate for it? Do they need a GPS to reset periodically? Do they just have a time limit before requiring pilot intervention? I would like to know if more components are required for the drift issue before buying anything.

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