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 46

fig. II-1-5 Nozomi status at time of LV2 open command (part 2)

(caption on the left says): Shock due to LV2 opening

(caption on the right says): Vibration due to He gas flow

end of page 46

page 47

fig. II-1-6 Status of OME firing at time of insertion into Mars transfer orbit (TMI)

(here, there are 11 pale yellows areas with captions and I will go from top to bottom, then bottm to right, in this order)

P1: pressure of storage tank
P2: pressure at regulator exit
P3: fuel tank pressure
P4: oxidiser tank pressure

injector temp.
OME firing time (or duration/)
delta V
status of LV2
LV2 open (this is the bottom and I will move right from here)

OME firng start
OME firing end/LV2 close

(now lines in red)

(dotted lines in red next to P4 says): originally planned regulator level
(red solid line next to delta V says): target delta V (423.33m/s)

(there are cations in 3 pink areas. they are, from top to bottom)

Not regulated like P2, P3 -> insufficient supply of He gas

insufficient amount of delta V

status changes in response to OPEN/CLOSE command

(what remains are 2 pale blue areas and they are from top to bottom)

OPEN (top)
CLOSE (bottom)

end of page 47

P