Thread: Team Update #6 is Out!
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Unread 23-06-2002, 22:53
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#0047 (ChiefDelphi)
  
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Ball Interactions
Posted by Dodd Stacy.

Engineer on team #95, Lebanon Robotics Team, from Lebanon High School and CRREL/CREARE.

Posted on 1/31/2000 7:54 PM MST


In Reply to: Re: Bumper issues (long & complex) posted by Jan Enderle on 1/31/2000 10:35 AM MST:




>Is 6.5' the right height relative to the centerline of the balls, and the issue of getting caught up on them? I'm not sure - we'll have to do some experimenting before we decide what to do.

The frictional interaction of the ball with the floor and the robot can be so squirrely as to really make you wonder about your grasp of the physics. In Orlando in 1998, we backed up against a loose (20') ball on the floor and the rear end of the robot was lifted off the floor.

Considering that the back of our machine was a flat lexan panel inclined *forward* (away from the ball) about 15 degrees, I still don't see how the ball 'crammed,' but it did. And that was repeatable.

Also be aware that your experimenting needs to include temperature/humidity conditions similar to Orlando to cover the design envelope. Those balls get positively sticky.

Dodd


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