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[Endgadget] Monster SpaceBot

post #1 of 15
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Quote:
Dextre is riding to orbit in nine pieces. Over the course of three spacewalks, astronauts will attach the hands to the robot's 11-foot-long arms. Then they'll lift the arms, which on Earth would weigh 775 pounds each, to Dextre's shoulders and bolt them into place.

"Some assembly required," Foreman jokes. "It reminds me of (being) a dad on Christmas Eve and opening up presents to put together … and wondering what I got myself into."

Dextre will be able to replace nearly 140 parts of the station, such as batteries and circuit boxes. It will do so thanks to a sense of touch, which will allow it to "feel" when it needs to apply more force to slide a component into place. It's expected to aid astronauts not only with spacewalks but making repairs.
Dextre-20 tonnes of Robot

& pretty damn Dextrous too! 1N or 0.22 lbf for fine work.
With 11-foot arms, a shoulder span of nearly 8 feet and a height of 12 feet..
Physorg.com
Quote:
Upon close inspection of Dextre, one notes its resemblance to the human shape: an upper body that can pivot at the waist with shoulders that support two identical arms. Each arm has a total of seven joints, providing an incredible amount of freedom when performing a task. However, Dextre is designed so that only one arm can move at a time in order to avoid self-collision, achieve greater stability and maintain operational similarity with Canadarm2. The greater stability is provided by the immobile arm, which is first commanded to anchor Dextre to an ISS stabilization point. At the tip of each arm, we find a "hand", known technically as the Orbital Replacement Unit/Tool Changeout Mechanism (OTCM). The OTCM consists of a set of parallel retractable jaws, which serve to grip payloads and tools. Each OTCM is also equipped with a retractable motorized socket wrench to mate and demate mechanisms on-orbit, as well as lights and a black & white camera. Dextre lower body is equipped with a pair of pan/tilt colour cameras that allow astronauts aboard the ISS, and engineers on the ground, to monitor the task, which is out of direct eyesight.
CanadaArm


Quote:
A typical task for Dextre is to replace a depleted (100 kg) battery, which involves bolting and unbolting operations as well as millimetre level positioning accuracy to properly align and insert the spare battery within its worksite and properly engage all connectors.
This peg-in-the-hole type of task demands a great amount of precision and a gentle touch to avoid binding. To achieve this Dextre has a unique feature which complements its remarkable dexterity: precise sensing of forces and torques at the "hand" and automatic compensation to ensure the payload moves smoothly into its mounting fixture. To illustrate the level of performance of Dextre, here on Earth it could likely be used to insert an item as delicate as a videotape into a video recorder.
Dexterous Manipulator
Arm Length 3.5 meters (11.48 feet) linear stroke
Mass (approx.) 1,662 kilograms (3,664 pounds)
Mass Handling/Transportation Capacity 600 kilograms (1,322.77 pounds)
Degrees of Freedom 15
Peak Power (operational) 2,000 W
Avg. Power (keep alive) 600 W
Applied Tip Load Range 0-111 N
Stopping Distance (under max. load) 0.15 meters (5.9 inches)



Now if that's not Serious Hardware I don't know what is!
Cheers
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post #2 of 15
And it's proudly made in Canada.
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post #3 of 15
How many Giga-hertz!?!?!
Unto The Void
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post #4 of 15
@Twinnuke
Quote:
How many Giga-hertz!?!?!
Doesn't matter It's big enough it will just take other peoples Giga-hertz or squash em like a bug.
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post #5 of 15
Probably Tera hertz!! With all that hard ware to be managed, it gotta have some giant brain.
post #6 of 15
Possible to overclock it? I see it , if you overclock left arm's joint , it would move faster.
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post #7 of 15
Really theres a tiny man inside there controlling it.
post #8 of 15
Quote:
Originally Posted by voice View Post
Really theres a tiny man inside there controlling it.
a tiny -CANADIAN- man
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post #9 of 15
I bet the CPU(s) are really slow.

(This is based on what I've heard - not what I know)

In space there's a lot of radiation, and unless I'm mistaken, some of that radiation can pierce thinner metals and get through space suits and outside devices. CPUs have to account for that; to remain operational, they have to generate minimal heat(as they can't easily dissipate it) and be less susceptible to radiation flying through them. Toggling a bit here or there, or changing the state of a transistor would make the CPU completely useless.

Because of that, I believe they use quite large nm processes. It makes the CPUs more resistant to space radiation. For the past 20 years they've used slow CPUs(40mhz ARM?), but for video feeds and stuff you need more processing power. For that reason, I believe they must be using processors at various locations - a controller(CPU), two video feed processors, and minimum two more to control arm/hand movements. Componentizing it like that would make it easier to debug if a CPU got fried, since then you only have one malfunctioning component/CPU that isn't responding.

ARM recently released a 200mhz CPU that uses about 0.1-0.2 watts; that's pretty low dissipation, and would fit quite well. The only thing that doesn't match is the ~90nm process used, which I doubt would be suitable in space.

But that's all guesswork based on what I think is logical.
     
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post #10 of 15
I dont like robots because I think they will take over the world.
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