ARLA/CLUSTER: Estudantes americanos constroem bateria de elevada capacidade para o proximo ARISSat

[Pedro Ribeiro]

Do histórico destas coisas ...

Que não se esqueçam de usar antenas flexíveis (há por aí diversas de 
portátil) e uns avisos vistosos para terem cuidado com elas e não 
esquecerem ligar as baterias antes de o lançar em orbita ...

73!

On 22-06-2012 12:21, João Gonçalves Costa wrote:
>
> Students build Supercapacitor battery for next ARISSat
>
> Penn State students have built a state-of-the-art supercapacitor 
> battery for the next amateur radio ARISSat satellite.
>
> On Feb. 3, 2006, astronauts tossed an old spacesuit off the 
> International Space Station. Inside was an amateur radio transmitter, 
> a temperature sensor and some batteries.
>
> The suit was a DIY satellite. It circled the Earth twice, repeating a 
> greeting recorded in multiple languages; ham radio operators listened 
> in as it passed overhead. Then the batteries died.
>
> The Radio Amateur Satellite Corporation, or AMSAT, tried again in 
> 2011. The battery in that satellite, a more traditional box design, 
> also failed.
>
> For the next model, AMSAT, a volunteer group, turned to the School of 
> Engineering at Penn State Erie, The Behrend College. Three students 
> designed a brand-new battery: a 1.8 kg cube powered by 15 
> supercapacitors, each roughly the size of a film canister.
>
> The battery was built to handle 16 charge cycles in a 24-hour period. 
> That will power the satellite in dark orbits, when the solar panels 
> are not facing the sun.
>
> To activate the battery before those solar panels charge, the students 
> -- David Jesberger, of St. Marys; Kathleen Nicholas, of Pittsburgh; 
> and Jacob Sherk, of Elizabethtown -- added four 9-volt Duracells.
>
> AMSAT hopes to fit the satellite into a rocket payload and onto the 
> International Space Station sometime in 2013. The astronauts won't 
> have to do much with it.
>
> "It's simple by design. They flip a switch, and they throw it out," 
> said Dakshina Murthy Bellur, an assistant professor of electrical and 
> computer engineering at Penn State Behrend. He supervised the battery 
> work, which counted as the students' senior capstone project.
>
> All three students have since graduated. All three have jobs: Nicholas 
> and Jesberger signed on with defense contractors, and Sherk works at 
> the Three Mile Island nuclear power plant.
>
> They continue to track the AMSAT project. They want to know when their 
> battery, upon which they laser-etched with their names and a Nittany 
> Lion paw print, gets a launch date.
>
> "That's going to be cool," Jesberger said. "We'll have our signatures 
> in space."
>
> Source Pennsylvania State University http://live.psu.edu/story/60125
>
> ARISSat http://www.arissat.org/
>
>
>
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