Unitree - daily training of robots

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Sergei G

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Jun 22, 2024, 5:19:54 PMJun 22
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A video showing how mechanically tough robodogs are


Best regards,
-- Sergei

Alan Timm

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Jun 24, 2024, 12:54:47 PMJun 24
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Aw man, their ai mode is improving by leaps and bounds.  disturbance recovery is definitely next level.

But man oh man did my heart skip a beat when he started picking up and yeeting that Go2.  Why?!?!?!?!!?
(still a cool demo)

Chris Albertson

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Jun 24, 2024, 2:01:08 PMJun 24
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Do you think this is “AI”?    It seems like conventional Control Theory.   Looking at the code they post to GitHub and the specs of their internal computer, it seems very conventional.

I am a little surprised at how tough the structure is.   The Unitree humanoid-biped is fragile.  I’ve seen photos of it breaking after a simple trip and fall accident.    This goes to show just how little “margin” there is in a biped design compared to the quad.   The Biped has to be (to quote a famous engineer) “just about ready to break, or it is too heavy”.   While the quad can stand the extra structural mass.


Anyway, this is a serious question.   What is the best design for one of these?    I think the best is a conventional robot controller that is highly parameterized.  Then a very lightweight neural network to select the parameters.   This is likely the way animals and humans work.  Much of our movement is nearly hard-coded and we only “think” about parameters like “how fast” and “what direction” and maybe a half dozen other things.   For the most part locomotion, pumping blood and breathing are all on “autopilot” but we do have some control.    A hybrid system might be best.

That said, I think the Unitree ‘bot’ is 100% hand coded.





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Carl

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Jun 25, 2024, 6:02:32 PMJun 25
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I would not start tossing yours around to see if that video is accurate! :-)

Gmail

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Jun 25, 2024, 6:34:31 PMJun 25
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🤣🤣🤣



Thomas

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Want to learn more about ROBOTS?









On Jun 25, 2024, at 3:02 PM, Carl <cfsu...@gmail.com> wrote:

I would not start tossing yours around to see if that video is accurate! :-)
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Chris Albertson

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Jun 25, 2024, 8:07:34 PMJun 25
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One more thought on this. All the motors on the Untree Quad are backdrivable. This means the legs are not rigid and the joints move when a leg hits the ground. I bet this helps a LOT to prevent damage.

My quad’s legs are not back-drivable and would break if you try to force them, bendable joints are a good thing.

Sergei G

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Jul 13, 2024, 11:40:39 AMJul 13
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One more video on the topic - a Chinese show visitors were allowed to push around a two-legged robo-monkey. 
New item · Album by Sergei Grichine

Best Regards,
-- Sergei

From: Chris Albertson <alberts...@gmail.com>
Sent: Tuesday, June 25, 2024 7:07 PM
To: Sergei G <msg...@hotmail.com>
Cc: RSSC-list <rssc...@googlegroups.com>
Subject: Re: [RSSC-List] Unitree - daily training of robots
 
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