Friday, February 22, 2013

Quadrocopters Throwing and Catching an Inverted Pendulum - Slashdot

Quadrocopters Throwing and Catching an Inverted Pendulum

derGoldstein writes"We've seen some very impressive aerobatics performed by quadrocopters before, but this is getting ridiculous. Robohub points to the latest advancement from the Flying Machine Arena, which developed algorithms that allow quadrocopters to juggle an inverted pendulum. One of the researchers working on it said, 'We started off with some back-of-the-envelope calculations, wondering whether it would even be physically possible to throw and catch a pendulum. This told us that achieving this maneuver would really push the dynamic capabilities of the system. As it turned out, it is probably the most challenging task we've had our quadrocopters do. With significantly less than one second to measure the pendulum flight and get the catching vehicle in place, it's the combination of mathematical models with real-time trajectory generation, optimal control, and learning from previous iterations that allowed us to implement this.'"

Wednesday, February 20, 2013

Tuesday, February 19, 2013

Monday, February 18, 2013

droid 2 global battery: bp6x

Search Results For: bp6x
 motorola bat bp6x
Motorola BP6X / SNN5843A

Features:
  • Composition: Lithium Ion
  • Voltage: 3.7v
Replacement Battery For The Following
Motorola Phone Models
CLIQ
CLIQ XT
Droid 2 A955
Droid 2 Global
Droid A855
i1
MB200
MB501
MB611
Availability: 
 motorola bp6x

Motorola BP6X / SNN5843A

Single Pack
$6.95
 motorola bat bp6x

Motorola BP6X / SNN5843A

2-Pack ($5.95 per item)
You Save 14%
$11.90
 motorola bat bp6x

Motorola BP6X / SNN5843A

3-Pack ($5.45 per item)
You Save 21%
$16.35
 motorola bat bp6x

Motorola BP6X / SNN5843A

6-Pack ($4.95 per battery)
You Save 29%
$29.70

Monday, February 11, 2013

Asteroid 2012 DA14: Space rock will miss the Earth by 17,000 miles.


Near Earth asteroid art

Asteroid 2012 DA14: Space rock will miss the Earth by 17,000 miles
On Friday, Feb. 15, the Earth is going to get a very close shave by an asteroid*. Called 2012 DA14, this 50 meter (160 foot) rock will pass just over 27,000 kilometers (17,000 miles) from the Earth’s surface. This is closer than our geosynchronous satellites, so this really is a close pass!

Thursday, February 7, 2013

Wednesday, February 6, 2013