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Originally Posted by Craig Putnam
Team 42 (P.A.R.T.S.) has done some off-season R&D in this area since last year's competition. Suffice it to say that, integrating accelerometer output twice to derive position data *without feedback* quickly results in a lot of accumulated error.
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Quite true, just ask 190 how far their robot thought it moved while it was sitting still on a table. Accelerometers have a lot of noise and the noise is magnified greatly when it's integrated twice. If you want to use an inertial system for position you need a way to get rid of the noise or another way to correct your position when the noise throws you off.