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What's needed to utilize an IMU such as the ArduIMU+ V3 to be used in an INS. Is there any other hardware needed?

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This is simply just too broad of a question and you're also asking for a set of list answers. Try rephrasing it. –  fgb Nov 27 '12 at 0:53

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It contains all the necessary components to function as a rudimentary IMU. If you read through the comments here, you'll see that either a GPS or magnometer will be required for error correction. All IMUs will suffer from drift without some calibration, especially one this cheap! I don't see a clear answer on whether this can operate without one, but I imagine it could, albeit with a large margin of error.

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how large of an error? –  Jordan Brown Nov 28 '12 at 3:23
    
I'm making a robot that learns to 'walk' and I need to determine when it moves forward for the learning. –  Jordan Brown Nov 28 '12 at 3:31
    
I've never used it so I won't speculate. I'm fairly confident the drift on one of these would be horrible after a minute's operation. –  David Hernandez Dec 4 '12 at 23:00

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