The University of Kentucky team is primarily composed on MEs. Our team stated that the mechanical design was the most challenging aspect. For Memphis, their ME senior design is two semesters while EE is one semester, so they've lost a lot of their EE support when the spring semester started. They're using a robostix, an add-on board for a gumstix, but withut the gumstix (since, I believe, all they really need is a microcontroller, not a full processor). However, they've run out of pins to drive all their servos.
They make extensive use of Vex: they found linear actuators, tracks (like our team), chains, and so on. Here's their robot, followed by a close-up of the linear actuators. Very slick.
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