The Forums

You must be logged in to post
Search Forums:


 






New robot walking record

No Status Selected
UserPost

9:42 pm
April 9, 2008


kymhorsell

Member

posts 119

[This is an especial item for ash :)
They'll be doing your walking for you next year...
New moneymaker: sponsor my robot $1 per metre?].

CU Robot Close to Walking History
Ithaca Journal (NY) (03/31/08)
Ashmore, Tim

Cornell University engineers have developed Ranger, a
four-legged robot that may have set a world record for the longest distance
walked by a robot. Ranger, which uses about half the electricity of an average
computer screen, was able to walk 1.2 kilometers on an indoor track before a
loose inertia sensor stopped the test. Mechanical engineering graduate student
Rohit Hippalgaonkar says the group believes energy efficiency is extremely
important. "We use a good 1,000 times less energy than [Honda's] Asimo,"
Hippalgaonkar says. "We believe that our robot walks closer to a human walking
than Honda's robot does. That's part of the reason why it takes so little
energy." Cornell professor Andy Ruina, head of the bio-robotics and locomotion
lab, says studying human movement is key to robotics research. He says because
humans are designed to use less energy, a robot that uses less energy would walk
more like a human. Ruina estimates that Ranger could walk up to five kilomete
rs, or about 3.1 miles, on a single battery pack.
Web Link |

3:15 pm
April 18, 2008


Rohit Hippalgaonkar

Guest

I would like to make a correction to this post. I had made an incorrect statement above, which appears in the following line of the article used above.

' "We use a good 1,000 times less energy than [Honda's] Asimo," Hippalgaonkar says. '

This is factually incorrect. This is incorrect, and was a mistake on my part. The Honda humanoid uses
about 10 times more energy per unit distance and weight, than the Cornell Ranger. It uses perhaps 50 times more power, in total. The error was solely mine and does not reflect anyone else's views in our lab ('The Biorobotics and Locomotion Lab' at the Department of Theoretical & Applied Mechanics, Cornell University).

* Our robot did finally manage to break its own unofficial distance-walking record. On April 3rd 2008, it exceeded even our expectations and walked 9 km (more than 5.5 miles) on a single charge of batteries, all the while using only 15-30 W of energy from its batteries all the time.

* Additionally here is some more information based on the Honda ASIMO website that might help compare the energy consumption and walking ability to theirs a little better. The most recent ASIMO has 6 kg of Li-ion batteries and operates 60 minutes on a full charge. Li-ion batteries have an energy density of up to 200
watt-hours/kg, and assuming that the Asimo has the best available, it would have about 1200 watt-hours available, and use 1200 watts. If the Honda robot could "run" for the full hour, and we don't know if this is
possible, it could go about 6 km in this time.

Source: http://asimo.honda.com/downloads/pdf/asimo-technical-faq.pdf

9:12 pm
April 20, 2008


kymhorsell

Member

posts 119

Thanks for the clarification.

I don't think too many people would take the "1000" literally. It seemed to indicate just "a large amount" rather than a specific number. :)

And, yes, some valuable lessons can be learned from passive walkers when it comes to implementing powered robotics.

I sometimes also argue along a similar line when it comes to modern "grent" computer h/w versus the s/w and algorithms that were used 10-20 (or even more!) years ago when h/w ran a lot slower and had fewer resources to squander.

(Such arguments may or may not be related to my own investment in those old-time codes :)



About the Ausrobotics II forum

Most Users Ever Online:

7


Currently Online:

4 Guests

Forum Stats:

Groups: 2

Forums: 6

Topics: 130

Posts: 320

Membership:

There are 850 Members

There have been 14 Guests

There is 1 Admin

There are 0 Moderators

Top Posters:

kymhorsell – 119

PirCapAdi – 24

Quinn – 24

robotman – 16

Gillerire – 16

daveymilla – 6

Administrators: ash (67 Posts)