Nozomi in perspective, Revisiting the causes of failure Options

[pandaneko]

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

[pandaneko]

http://www.mext.go.jp/b_menu/shingi/uchuu/...ts/04061101.pdf

above for ease of reference

page 53

fig. II-2-1 Schematic of LV2 gas system latching valve

(there are 4 brown squares and these are colis)

(light blue areas are ferrite stainless steel)

(grey area in the middle is Inner piece or Inner member (presumably movable component?, P))

(to the left of above is the plug)

(incoming yellow arrow says: from He tank)

(outgoing arrow says: to oxidiser tank)

(what is seen on the extreme right is the LVDT)

Note: There is a guide with LV2 so that the inner piece is accurately centred.

end of page 53

page 54

table II-2-2 Ground test history of LV2 valve

(this is a table and I consider it to be made of 4 major columns which subdivide)


C1R1: inspection (or test)/pressurised (or loaded?, or even subjected to test?,P) items environment
C1R2: capability confirmation test
C1R3: vibration
C1R4: mechanical shock
C1R5: thermal environment
C1R6: life cycle
C1R7: oxidiser environment 1
C1R8: oxidiser environment 2

C2R1: design quality confirmation test

C21R2 (1st subcolumn of C2R2 is meant): items carried out by valve manufacturer (QT)
C22R2 (2nd subcolumn of C2R2 is meant): items carried out domestically

C2R3C1 (C1 is a subcolumn within C2, counted from left to right): function
C2R3C2: mechanical environment
C2R3C3: thermal
C2R3C4: life (or durability)
C2R3C5: immersion test

C3R1: flight model manufacturing approapriateness confirmation test

C31R2 (1st subcolumn in the main column C3 is meant): AT
C32R2: subsystem (domestic)
C33R2: at system level (domestic)

C3R3C1: items carried out (by valve manufacturer)
C3R3C2: module test or modular test
C3R3C3: subsystem test
C3R3C4: test immediately after incorporation into the system
C3R3C5: thermal test
C3R3C6: mechanical environment
C3R3C7: thermal vacuum
C3R3C8: test immediately upon arrival at launch site

C4R1: Note

C4R4: double circle is a detailed test and a single circle is a simplified test

C4R9: valve on its own (exposed 16 hours to vapour)

C4R10: valve on its own (left in running NTO for 5 hours)

end of page 54

P