PDA

View Full Version : Festo's new babies



ashwinmudigonda
04-28-2008, 09:56 PM
I bumped into this today. Festo has released yet another biomorphic...dare I say Robot. The videos speak louder than my words:

http://www.youtube.com/watch?v=F_citFkSNtk
http://www.youtube.com/watch?v=q_PIj5qbQ2Q
Jelly motion is the most ancient of all aquatic locomotions. I read a paper somewhere that explained that larger jellies have a different propulsion protocol than smaller jellies. These all brain and tentacle blobs are truly graceful as evident by this bio-inspired creation.

Matt
04-28-2008, 10:10 PM
sweet!

trey3670
04-28-2008, 11:10 PM
thats just wild,how does it control movement?

Adrenalynn
04-29-2008, 01:59 AM
excerpted from the web (it's in German - I'm translating..)

"AirJelly is a radio controlled airborne jellyfish with a central electric drive and [smart adaptable mechanics] - {weak translation sorry}

AirJelly consists of helium-filled balloon a diameter of 1.35m. This gives a volume of 1.3 cubic meters of helium. One cubic meter of helium provides enough buoyancy to lift one kilogram so the airjelly must be less than 1.3KG

AirJelly has two lithium-ion polymer batteries rated at 8v and 400mA, which can charge in half an hour and are Airjelly only power source. A central electric drive unit transmits force to a bevel gear and then to eight spur gears in succession.

These gears [turn] eight shafts which [activates] a [crank arm] which move the jellyfish's eight tentacles. Each tentacle is designed as a structure with Fin-Ray Effect(R) – a construction from the anatomy of a fish’s fin. The actual structure consists of two alternating tension and pressure [?] connected by ribs. If a [?] is subjected to pressure, the geometric structure bends in the direction of the applied force. Together, the tentacles produce a [?] forward motion similar to that of their biological model.


Controlling AirJelly’s motion in three-dimensional space is made by weight displacement. For this, a pendulum is set in motion by two actuators in the X and Y directions. The actuators are positioned at the jellyfish’s [north pole] and are [proportionately] controlled. The pendulum is 55 centimetres long. AirJelly’s center-of-mass is displaced in the direction of the pendulum’s motion, the jellyfish then moves in the same direction. By way of this [?] forward motion, AirJelly can move in any spatial direction."

I had to guess a bit there, sorry. Someone whose German is better than mine can take a shot at it: http://www.festo.com/rep/de_de/assets/Corporate_img/Festo_AirJelly_de.pdf

ashwinmudigonda
04-29-2008, 09:32 AM
Aah! thanks for that! Pendulum control...one of the most researched control topics.

jdolecki
04-30-2008, 09:20 AM
Those thing are wild and night with the right lighting they would scare the heck out of ya.