First Military Exoskeleton Reaches Prototype 397
JonathanGCohen writes "The U.S. Military has created the first ever prototype for an exoskeleton to be worn by soldiers capable of making its 100 pound weight and a 70 pound supply package feel like five pounds." From the article: "Bleex 1 consists of a pair of hydraulically powered leg braces, more than 40 electronic sensors, a control computer, and an internal-combustion engine providing power from an attached backpack. The plastic and carbon-fiber braces are affixed rigidly to the soldier through a customized pair of standard Army boots, with more compliant and giving connections at the chest and waist. These looser connections prevent blisters and abrasions."
old news (Score:2, Informative)
Here is another link:
http://bleex.me.berkeley.edu/bleex.htm [berkeley.edu]
Boom! (Score:5, Informative)
Article (Score:5, Informative)
Re:Bleex 2 (Score:3, Informative)
Re:Tin soliders... (Score:5, Informative)
Hint: if this thing is for battlefield use, it wont have exposed cables/sockets. The whole exteriour will be a groundplane.
Any EMP strong enough to kill it would electrocute you via your tooth cavity filling, too.
(emps work well vs cities, not military units. just like biological/chemical weapons...)
Article text for those having troubles (Score:1, Informative)
Those whiz kids at Darpa are at it again. This time they want to use technology to let soldiers carry up to 220 lb in backpacks over all types of terrain, terrain vehicles can't get through, and for extended lengths of time. They believe the key is wearable robotic exoskeletons and have invested $50 million in the project. One recipient, a design team at the University of California, Berkeley, is under the lead of Mechanical Engineering Prof. H. Kazerooni. They've completed work on their first prototype, Bleex 1 (for Berkeley lower extremity exoskeleton) and are working on Bleex 2.
Bleex 1 consists of a pair of hydraulically powered leg braces, more than 40 electronic sensors, a control computer, and an internal-combustion engine providing power from an attached backpack. The plastic and carbon-fiber braces are affixed rigidly to the soldier through a customized pair of standard Army boots, with more compliant and giving connections at the chest and waist. These looser connections prevent blisters and abrasions.
The 2-hp engine turns a pump to pressurize the hydraulic system with 1,000-psi fluid. Hydraulics power the actuators, giving the exoskeleton its muscles and letting it move. The engine also turns a generator for electricity. The device carries about a quart of gas, enough for 15 min of high-powered walking. After experimenting with a number of fuels, including concentrated hydrogen peroxide, Kazerooni decided on using gasoline based on its power density. It also lets the device be refueled in the field. If Darpa has its way, however, the exoskeleton delivered to the Army will probably use JP-4, the common battlefield fuel for tanks, humvees, and other armored vehicles.
Key to controlling Bleex 1 is the lack of operator controls. Instead, Berkeley researchers clinically analyzed the human gait and programmed the robotic legs to follow that pattern. The wearer simply moves his limbs, and the suit detects that movement and powers the suit to follow. The backpack load is almost entirely supported by Bleex. But because the device is so sensitive to inputs, it is almost unstable, says Kazerooni. The operator is needed to provide balance.
"The pilot is not 'driving' the exoskeleton," says Kazerooni. "Instead, the control algorithms in the computer constantly calculate how to move the exoskeleton so that it moves in concert with the human."
Each leg has five electronic modules connected in a high-speed synchronous ring network or LAN. Each module is connected to nearby sensors and actuators, and all modules talk to each other, as well a controlling computer. A third ring network lets the design team debug the system and acquire data. Eventually, the third ring may support electronic and communication gear needed by the soldier (but not by the exoskeleton).
During development, an operator donned Bleex 1, which weighed about 100 lb, along with a backpack carrying a 70-lb load. He could walk at about two steps per second (or 6 fps) and it felt like he was only lugging a 5-lb load. The first prototype was restricted to walking on flat terrain and not-too-steep hills, but the wearer could also squat, bend, and swing from side to side, as well as step over obstacles. The suit is water resistant and will float, according to its inventors.
The next-generation device, Bleex 2, should be unveiled soon. The biggest change, and challenge, is devising a new power source. For example, it could use a hybrid power source instead of just a gas engine, which might cut down on weight and noise. Weight reduction is a major goal of the team and Bleex 2 should tip the scales at half the weight of Bleex 1. In tests, Bleex 2 let operators carry 200-lb loads and run faster than 6 fps. The Berkeley team is also working on extending the range, flexibility, and agility of the system.
(Goddammit, I'm trying to post this and damned
Japanese version (Score:3, Informative)
The Sexy Japanese Version [techdigest.tv]
BTW isn't having a gas engine bad because of the noise it might make?
Re:Are hydraulic exoskeletons the only way? (Score:5, Informative)
The only force coming out of the springs would be the force you used to compress them. So instead of using that force to just carry the damn load directly, you're using that force to compress the springs to carry the load. Add to that the force needed to carry the springs themselves, and the force lost through entropy, and you've got the stupidest powered exoskeleton idea I've heard all day.
Re:If they only up-armored it (Score:5, Informative)
MechWarrior.
Re:15 minutes? (Score:4, Informative)
Videos (Score:2, Informative)
Part One [berkeley.edu]
Part Two [berkeley.edu]
Part Three [berkeley.edu]
How old is this story? (Score:2, Informative)
The article sounds an awful lot like it was lifted from this press release [berkeley.edu], dated March '04.
TFA is DoS'ed, so I have to ask... have there been new developments in the last couple years, or is this just a dupe from two years ago?
Re:Boom! (Score:3, Informative)
There's nothing exceptionally volatile about "JET FUEL". Jet fuel is less reactive than avgas. JP-4 is 50-60% gasoline and the rest kerosene. Sure, JP-8 would be less volatile, but come on, do you feel exceptional trepidation when you mow your lawn? The gas in your lawn mower is more volatile than JP-4.