Detail In Praise of Celestial Mechanics   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 407 no. 8838 (Jun. 2013), page SS16-SS18. Topik: Aerospace Industry; Computer Programming; Software Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.76 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel THE launch on March 1st of the Falcon 9 rocket, carrying a Dragon cargo capsule (pictured) to the International Space Station, went perfectly. But once the capsule had reached orbit, a problem emerged: only one of its four sets of thrusters was working. The spacecraft was drifting, unable to stabilise itself, let alone dock with the space station. Its tumbling motion meant it could not turn its solar panels towards the sun and made communication difficult. Assuming that the problem was caused by blocked valves, the SpaceX team wrote software telling the Dragon to increase and then suddenly decrease the pressure upstream of the valves, hoping that this pressure hammering would unblock things. An early instance of such space-hacking involved Mariner 10, an accident-prone NASA probe that performed fly-bys of Venus and Mercury in 1973. Indeed, redundancy, resiliency, adaptability and programmability, along with human ingenuity, seem to be the keys to keeping distant hardware going, years or even decades longer than planned. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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