Society of Robots - Robot Forum

General Misc => Robot Videos => Topic started by: Admin on March 19, 2008, 12:13:18 PM

Title: new Big Dog videos - impressive!
Post by: Admin on March 19, 2008, 12:13:18 PM
Boston Dynamics has released new video of their 4 legged Big Dog.

The balancing capabilities are amazing!

[youtube]mmVaLp8icoU[/youtube]
Title: Re: new Big Dog videos - impressive!
Post by: airman00 on March 19, 2008, 01:10:30 PM
that is amazing

How are they making the legs move? Muscle wire, servos, what is it?
Title: Re: new Big Dog videos - impressive!
Post by: hgordon on March 19, 2008, 01:16:18 PM
Not exactly "stealth", but still very impressive.  It will be nice when they can get rid of that weed-wacker engine.
Title: Re: new Big Dog videos - impressive!
Post by: IceMetal on March 19, 2008, 01:26:39 PM
I'm pretty impressed with the run and the jumping, I wonder if it can climb stairs,
Title: Re: new Big Dog videos - impressive!
Post by: JonHylands on March 19, 2008, 02:08:54 PM
The legs are hydraulic, thus the need for the "weed-whacker" engine...

I would think, given the load-carrying capacity of that thing, that they could give up 50 lbs to some high-end lithium batteries, and run a big brushless motor to drive the hydraulic pump...

- Jon
Title: Re: new Big Dog videos - impressive!
Post by: TrickyNekro on March 19, 2008, 03:38:30 PM
Yep, it's noisy!!!
It's kinda wonder why they would use such an old technology ( inner combustion engine ) for such a high-tech thing!!!
It must be the refuel time which pays the sacrifice!!! Since batteries still need to be recharged, but with an engine you can provide power too!!!
It's still amazing although!!! Actually walking like a dog, or a human on four!!! ( I hope this is not swearing I don't know)
Title: Re: new Big Dog videos - impressive!
Post by: ed1380 on March 19, 2008, 03:55:19 PM
i dont remember it being so noisy in the old vids.
still walks funny
Title: Re: new Big Dog videos - impressive!
Post by: TrickyNekro on March 19, 2008, 04:17:09 PM
i dont remember it being so noisy in the old vids.
still walks funny

But I do... It the gas engine which makes a terrible sound....
But anyways... Amazing...
Title: Re: new Big Dog videos - impressive!
Post by: superchiku on March 20, 2008, 12:28:59 AM
cool design work done with the chasisand movement mechanism
Title: Re: new Big Dog videos - impressive!
Post by: JonHylands on March 20, 2008, 08:01:02 AM
It's kinda wonder why they would use such an old technology ( inner combustion engine ) for such a high-tech thing!!!

Well, the reason they do this is because there are no batteries on earth that can provide anywhere close to the energy density of gasoline...

- Jon
Title: Re: new Big Dog videos - impressive!
Post by: Ro-Bot-X on March 20, 2008, 10:46:54 AM
Actually, there is wather. There are pure water motors in the works as an alternative to gasoline. Until they are ready for production, there is the Brown Gas Cell (splits H2O {liquid} in HHO {gas}) that increases the mileage on a regular motor up to 100%.
Title: Re: new Big Dog videos - impressive!
Post by: ed1380 on March 20, 2008, 03:25:08 PM
yeah whatever :p
diesel pwnorz all
Title: Re: new Big Dog videos - impressive!
Post by: TrickyNekro on March 21, 2008, 04:47:10 AM
Actually, there is water. There are pure water motors in the works as an alternative to gasoline. Until they are ready for production, there is the Brown Gas Cell (splits H2O {liquid} in HHO {gas}) that increases the mileage on a regular motor up to 100%.

And the engines can provide the same torque at the same RPM??? If yes then Hybrid cars are just a commercial Logo and not the most environmentally friendly.....
Title: Re: new Big Dog videos - impressive!
Post by: JonHylands on March 21, 2008, 06:13:30 AM
And if you believe there are water engines coming right around the corner, I've got a perpetual motion machine here I'd like to sell to you...

- Jon