robotics : legs and wheels

Hi !

Generally, wheeled robots sound limited, and legged robots too much complicated.
So, wheels or legs ?

Well, seems it's possible to take the best of the two worlds : Look at this robot !

http://www.dailymotion.com/cluster/tech/featured/video/x3g2y3_rhex




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CameronSS9 years ago
Owww...My stomach lurched painfully when that robot tumbled down the rocks.

...I have got to get out of the lab more.
Kiteman9 years ago
Have you seen the three-pronged versions of these - called whegs. I've seen them used as the landing gear of an entomopter.

Hey! They're cheating - the swimming legs are flexible and the walking legs are rigid!
Really? The first shot of the robot going into the water looked like he was using the same legs.
The swimming legs seem quite flexible, and are a different colour. Watch the way the walking legs don't flex at all in the clip immediately after.
The two shots between 1:09 and 1:24 look like "dog-paddling" with the land legs. After that I saw the robot with yellow flippers on in a pool. Is that what you meant about color change and flexible legs?
Yes - the dog-paddling seems to be just splashing about in "hip" deep water. Just after the 'bot falls down the cliff, there is a moment when it tries to turn it's legs backwards, and they don't bend when they hit the ground - it has to reverse the direction to be able to lift off the ground.
Ah, I was under the impression that it was floating when at rest, but now I see you are right. Well, it's still pretty spiffy, but not as.
Maybe they're working on a compromise leg? Stiff enough to walk on, flexible enough to swim. Methinks a wider "foot" would make for more efficient swimming, applying a greater bending force to the limb, and giving better grip in mushy ground.
chooseausername (author)  Kiteman9 years ago
Whegs !
I wonder why they did not use this technology for martians robots =o/


Because that would mean admitting that you can produce decent systems without spending several billion dollars. (Such as the DC-X - the whole rocket cost the same as a single shuttle toilet)
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