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Erm....
Posted by Kevin Sevcik at 03/28/2001 3:14 PM EST
Other on team #57, Leopards, from BT Washington and the High School for Engineering Professions and Exxon, Kellog Brown & Root, Powell Electrical.
In Reply to: Idea for using the gyro
Posted by Kris Verdeyen on 03/28/2001 12:29 PM EST:
In theory, this is a nice idea, and would be pretty nifty. The main problem is that the gyro is a yaw RATE sensor. Which of course means that to get the actual yaw of the robot, you'd have constantly add the values coming from the sensor. And of course the problem there is both calibrating the sensor VERY accurately and the fact that you're going to get lots of noise in your data. Even assuming that the noise would tend to average to zero, you'd still be in trouble if you miscalibrated the sensor, as the more you turn, the more off your robot's sense of direction would be. Plus I don't know how the occasional bump would effect the system.
All in all, this reminds me of a story I heard somewhere about some chinese cart thing. The ancient chinese built a cart with all kinds of differentials and gearing in the wheels. The upshot of all that fine engineering was a statue at the top that always pointed north. A feat equalled by a cheap plastic compass you can find in a box of cracker jacks. Basically, I think that there just has to be an easier way to get a directional sense on a robot. How about building an actual gyro and attaching it to a potentiometer? (Do they make pots that are really easy to turn?)
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but either way, we are a team - we go home together
and celebrate our accomplishments, whatever they are
and try to learn from our mistakes. - KenWittlief [more] 
24-06-2002, 02:56
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