Autor Tema: STS-133 (space shuttle Discovery-ISS assembly flight ULF5)  (Posjeta: 19935 vremena)

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Offline Arkturus

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« Odgovori #280 u: 30.03.2011. u 11:50:32 sati »
Ono što se ja pitam je način odvajanja bustera. :97:
Jel to tempirano ili na gumb (ako se što zaglavi) ili je mehanički rješeno.
Pod tim mehanički mislim, postoji li neki okidač koji proradi kad gorivo dođe do pred kraj i potisak padne pa taj okidač detonira naboje koji odvajaju bustere?  :262: To mi izgleda nekako najsigurnije. Ili možda postoji senzor koji registrira pad potiska pa automatski odvaja bustere? :219:

Na ovoj snimci se jasno vidi kako busteri nakon odvajanja još imaju neki slabiji potisak nekoliko sekundi.

Offline Fire

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« Odgovori #281 u: 30.03.2011. u 22:04:45 sati »
Stavi u opis videa da nisi vlasnik materijala i bla bla bla, uglavnom to pomaže :)
Stavio sam neku napomenu u sam video, ali mislim da to nema uticaja na ovo.
http://www.youtube.com/t/contentid

Ono što se ja pitam je način odvajanja bustera. :97:
Biće da se odgovor može naći u ovom dokumentarcu...ima tamo jedan opaki sklop IEA (Integrated Electronics Assembly).
http://www.zvjezdarnica.com/forum/index.php?topic=870.msg104203#msg104203
Kod gorivo za SRB-ove, APCP, mislim da se precizno da izračunati i dizajnirati koliko i kako će trajati sagorijevanje i onda biće neki timer u IEA aktivira razdvajanje.

...u biti ima ovdje opis;
http://science.ksc.nasa.gov/shuttle/technology/sts-newsref/srb.html
Citat:
SRB SEPARATION

      SRB separation is initiated when the three solid rocket motor chamber pressure transducers are processed in the redundancy management middle value select and the head- end chamber pressure of both SRBs is less than or equal to 50 psi. A backup cue is the time elapsed from booster ignition.

      The separation sequence is initiated, commanding the thrust vector control actuators to the null position and putting the main propulsion system into a second-stage configuration (0.8 second from sequence initialization), which ensures the thrust of each SRB is less than 100,000 pounds. Orbiter yaw attitude is held for four seconds, and SRB thrust drops to less than 60,000 pounds.

      The SRBs separate from the external tank within 30 milliseconds of the ordnance firing command.

      The forward attachment point consists of a ball (SRB) and socket (ET) held together by one bolt. The bolt contains one NSD pressure cartridge at each end. The forward attachment point also carries the range safety system cross-strap wiring connecting each SRB RSS and the ET RSS with each other.

      The aft attachment points consist of three separate struts: upper, diagonal and lower. Each strut contains one bolt with an NSD pressure cartridge at each end. The upper strut also carries the umbilical interface between its SRB and the external tank and on to the orbiter.

      There are four booster separation motors on each end of each SRB. The BSMs separate the SRBs from the external tank. The solid rocket motors in each cluster of four are ignited by firing redundant NSD pressure cartridges into redundant confined detonating fuse manifolds.

      The separation commands issued from the orbiter by the SRB separation sequence initiate the redundant NSD pressure cartridge in each bolt and ignite the BSMs to effect a clean separation.

A ovdje ima isto o ekplozivnim vijcima i motorima za odvajanje SRB-ova;
http://www.zvjezdarnica.com/forum/index.php?topic=2764.msg61470#msg61470

Offline Arkturus

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« Odgovori #282 u: 31.03.2011. u 09:41:31 sati »
Tenx.