Nozomi in perspective, Revisiting the causes of failure |
Nozomi in perspective, Revisiting the causes of failure |
Oct 23 2011, 09:12 AM
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
http://www.mext.go.jp/b_menu/shingi/uchuu/...ts/04061101.pdf
Above pdf file will be translated for aspiring students in aeronautics, control engineering etc. so that in future lay people like me will be able to enjoy planetary scenes and events without worrying about failures. The overall title is "Looking into the causes of failure and trying to find the right measures to take for the future with respect to the 18th scientific satellite (PLANET-B ) not inserted into Mars orbit as planned" and it is dated 21 May 2004. This file is very much detailed at 1.1 megabytes and the number of pages is about 40, I think. In addition, I will be translating 3 more files after this particular file. They will be; 1. ISAS file with views and comments on the failure 2. Another ISAS file, a newsletter written out in a series of 4 individual letters. 3. JAXA file, which is a press release and it is a very concise document with just sufficient details. Re concise link making I tried a few times, but I simply failed and all the links will be fully pasted out as required. Pandaneko |
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Dec 5 2011, 09:51 AM
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
above for ease of reference page 44 fig. II-1-3 Telemetry data during visible period after insertion into Mars transfer orbit (TMI) (here, the only thing that needs translation is the caption inside a Mexican hat like area and it says): oxidiser tank pressure P4 is low end of page 44 page 45 fig. II-1-4 Nozomi status at time of LV2 open command (part 1) (here, there are 9 squares in yellow and they are, from top to bottom): P1: pressure of gas storage P2: regulator exit pressure P3: fuel tank pressure P4: oxidiser tank pressure injector temp. OME firing duration (or time?) delta V LV2 status LV2 open (There are 3 blocks in pink and they are): (referring to P2): transient decrease in regulator pressure due to rapid supply of He gas to oxidiser tank which was judged to be lower than normal (referring to P4): pressure rise as LV2 is opened -> He gas is being supplied (last small square): pressure drop is judged to be due to imperfect opening of LV2 (there are 2 more small squares in pale blue and they are): (top square): Open (bottom square): Close end of page 45 P |
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