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Unread 20-01-2010, 15:38
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Jared Russell Jared Russell is offline
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FRC #0254 (The Cheesy Poofs), FRC #0341 (Miss Daisy)
Team Role: Engineer
 
Join Date: Nov 2002
Rookie Year: 2001
Location: San Francisco, CA
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Re: Semi-Omni-Arcade Drive

Quote:
Originally Posted by byteit101 View Post
what would be the average gyro drift for a 2 minute match?
There is not a simple answer to this. It depends on:

1) Whether you at any point saturate your sensor (turn faster than it can detect).
2) The sampling frequency.
3) The frequency profile of the turns your robot is making.
4) How well you've calibrated the gyro.
5) The gyro's own thermomechanical noise properties.
6) Any filtering that you do.

In other words, a gyro that is sitting still for 2 minutes may not drift that much, but one that is on a "twitchy" robot slamming into things for 2 minutes may drift by quite a bit (I have seen ours drift > 180 degrees in match).