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Extreme parkour with legged robots

extreme-parkour.github.io

131–140 of 195 posts

Re: Extreme parkour with legged robots

#131

Why doesn't it use existing momentum to get over that gap or up on the ledge? It slows down before it makes the jump

Looks like it slows down just a tiny bit (needs time to compute?) before making some of the jumps in this video. So not completely losing momentum. Wonder if this will look more fluid once it's able to reach a higher speed.

Re: Extreme parkour with legged robots

#132

Out of curiosity, is everyone of university age good at clickbait now? Like the whole point of saying “extreme” parkour is to boost engagement from pedantic analytic people like us talking about the hyperbolic title choice

It is a bit disappointing. This video did not show anything more "extreme" than various Boston Dynamics videos from years ago. And to be even more pedantic, this is hardly parkour at all. Jumping over a gap and climbing on a box has little resemblance of what we came to expect when we hear this term.

Re: Extreme parkour with legged robots

#133
post #113

Earlier quoted context omitted.

Of course, the details of how to actually implement something like this are way more complex than "just throw everything into a big neural net with images as the inputs and actuators as the output". You need to provide the right kind of guidance in order to learn a usable policy in any reasonable amount of time. A very recent development (which this work builds on) is the idea of "online adaptation". It essentially i…

I guess this is why evolution is taking unreasonable amounts of time.

Assuming time has no end, what would be a reasonable amount of time ? Let’s say you could evolve at 10000x the speed ? So what ?

Where do you need to be ?

Re: Extreme parkour with legged robots

#134
post #125

Earlier quoted context omitted.

> Is the US supplying offensive weapons to Ukraine contributing to the national defense? It's not. It's contributing to European security, and as such is necessary for the US to reaffirm their suzerainty over Europe, but it's not really about US defense and even less about National Security. (I'm glad they do btw, because we European powers would have left Ukraine fall after deciding it would be too expensive to help…

European security is national security via geopolitics. Being a global superpower has many benefits for US citizens.

> European security is national security via geopolitics.

If you consider “national security” to be a meaningless buzzword and not an actual concept, you can say that. It's as accurate as saying “US sports results at the Olympics is a national security issue via soft power”.

Pretty much everything is “national security” by that standards.

> Being a global superpower has many benefits for US citizens.

Sure, but most of them don't have anything to do with national security.

Re: Extreme parkour with legged robots

#135
I'm curious why the leg joints hinge towards the posterior, instead of away from the posterior like they do in dogs. Seems we would want to mimic the nature model as optimal, however does this imply the robot model performs better, in a way that somehow all quadrupeds didn't evolve to?

Or is it some nuance of metals vs carbon-based joints?

Re: Extreme parkour with legged robots

#137
I scanned the paper and, if I got it right, during training the robot gets "external" information about its world position and speed compared to pre-set waypoints, something that an animal or person wouldn't have access to. What I didn't understand for sure is if this information is also available to the robot while performing the "parkour": I'm pretty sure that it perceives the obstacles only through its depth camera, but how does it determine where it is and where it should go next? Is this still done through waypoints and global position knowledge? A joystick is mentioned for control; is that being used to set waypoints? Or feed the robot a relative direction and speed?

Re: Extreme parkour with legged robots

#138

I'm curious why the leg joints hinge towards the posterior, instead of away from the posterior like they do in dogs. Seems we would want to mimic the nature model as optimal, however does this imply the robot model performs better, in a way that somehow all quadrupeds didn't evolve to? Or is it some nuance of metals vs carbon-based joints?

Dogs have more joints, one for the knee where the femur meets the tibia and one for the ankle where the tibia meets the tarsal bones. If you just have one single joint in the hind legs you probably want to be able to push off as easily as possible, so the lower one makes more sense.

Re: Extreme parkour with legged robots

#139

I am always wondering, why they build such complicated biology inspired robots, while they can build something with wheels and simple levels which allows robot to jump over obstacles and turn upside down if it landed on the back.

Well, for one obvious reason, that's not terribly interesting from a scientific perspective.

For the other, legs are more versatile than wheels, especially when it comes to uneven terrain.

Re: Extreme parkour with legged robots

#140
post #113

Earlier quoted context omitted.

I guess this is why evolution is taking unreasonable amounts of time.

Assuming time has no end, what would be a reasonable amount of time ? Let’s say you could evolve at 10000x the speed ? So what ? Where do you need to be ?

> Where do you need to be ?

Where is debatable, but you definitely need to be there by end of Q3 or we miss P&E targets.

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