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Unread 02-09-2014, 23:27
Max Boord Max Boord is offline
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Re: Penalizing mecanum wheeled robots durring alliance selection.

Quote:
Originally Posted by efoote868 View Post
Gyro drift occurs when the gyro has very small errors in the rotation value it is reading (turning at 1 degree / second versus reading 1.001 degree / second).

When you integrate the error of rotation, you get an error in position.

What was discussed was that after the gyro runs for sixty seconds, the cumulative error is about 2-3 degrees, not 120 to 180 degrees.


Yes, a field centric robot that is off by 2-3 degrees per second is going to be difficult to drive, but I'd say something is fundamentally wrong with the system you're referencing (gyro not calibrated, pin out is wrong, code is wrong).
Interesting. with the KOP gyro my setup would accelerate up to 20 degrees per second in some cases while in others would only move 1-2 degrees per minute. The drift would also change direction so I do not think it was a calibration issue. I even tried it on a spare CRIO and got similar results to one encased inside a driving competition robot.
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