Could a robot ride a skateboard

On 08/31/2010 06:56 PM, rangerssuck wrote:


In that particular case everything was operating open loop, and any balancing came from the track width of the miniature skateboard and the width of the feet of the robot.
Get a full size skateboard + 100lb robot to whiz down a paved road at 50 miles per hour -- that won't be trivial.
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I didn't say it would be. And what makes you so sure that the robot in the video was open loop?
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On 09/01/2010 05:00 AM, rangerssuck wrote:

Elsewhere in this thread that is concluded. I'm just a trusting soul.
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I think you are right. This is from the site Roboporium:
"Plen is a small desktop toy humanoid robot that can replicate complex human movements. It is controlled remotely by use of a Bluetooth enabled phone. When programmed, it is able to use a skateboard, rollerskates, pick up, kick and throw small things, and stand up if he tumbles to the floor. It doesn't feature any sensors or automatic software reactions to certain events, as it's entirely remote-controlled." http://roboporium.catalogexplorer.com/humanoid-robots/plen.aspx
However, they do have more advanced robots with gyros and accelerometers. http://www.roboporium.com/products/research-robots.htm
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On 08/31/2010 04:08 PM, anorton wrote:

The wide feet give it away to some extent -- they're that way for passive balance. I suspect that the skateboard doesn't turn by tilting, either.
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On Aug 31, 10:19am, Ignoramus20906 <ignoramus20...@NOSPAM. 20906.invalid> wrote:

The inverted pendulum problem: http://en.wikipedia.org/wiki/Inverted_pendulum http://en.wikipedia.org/wiki/Segway http://www.engin.umich.edu/group/ctm/examples/pend/invPID.html
jsw
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On Tue, 31 Aug 2010 09:19:31 -0500, Ignoramus20906

Check out this Big Dog... Pretty F'ing cool!

http://www.youtube.com/watch?v
bExqhhWRI
Fred III
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Looks scary to me, but very interesting.
I would not want to be in a ditch, being attacked by a battalion of these bigdogs. But OTOH, they are good for the military as long as they are fuel efficient
i
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On 08/31/2010 07:19 AM, Ignoramus20906 wrote:

Yes, a robot could be designed to do this. Easy would be a mildly tilted surface with no obstacles, and the robot just has to get to the bottom. Moderately easy would be if the robot has to pump to get up speed. Maneuvering around obstacles would be a systems design challenge, but would be fairly orthogonal to the low-level control needed to balance and point where you wanted it to go -- it'd almost be like adding such steering to any vehicle.
Making it do tricks in pipes would be hard.
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Ignoramus20906 wrote:

Yes. But only if its running Slackware. ;-)
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yes, and it's been done - there are one wheeled robots, for example. But if by "ride" you mean to do jumps and to pedal it with feet shod with real shoes, that's a bit harder. But propelling one through a well marked path is not hard

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On Aug 31, 10:19am, Ignoramus20906 <ignoramus20...@NOSPAM. 20906.invalid> wrote:

A year or two ago I saw a Nova or some other PBS show that was about a DARPA challenge to make remote control vehicles. Most of the contestants used four wheel drive vehicles. But one group tried it with a motorcycle. The thing actually could balance and drive for a little while. Quite amazing.
George H.
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When I was little I tried some stunt on my bicycle that didn't work and I jumped off. It just continued down the street, wobbling and recovering when it hit a pebble, until it slowed down, circled and fell.
jsw
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George Herold wrote:

Watch it again, George.
They were SELF controlled, not remote!
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Richard Lamb



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