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Originally Posted by Joe Ross
You're right, the problem wasn't the sensors, it was the RC. It could only read the sensors 38 times a second. If you robot moved off the line in 1/38 of a second, you were hosed. This year however, you can read the sensors much much faster. You still have the problem of momentum, but the task has become much easier.
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I would speculate that while the sensors were an issue, the phase lag between motor corrections and physical system response is a far greater issue. I saw some teams usign an aray of sensors last year to avoid loosign the line.