A Case Study in NASA-DoD - The Black Vault
A Case Study in NASA-DoD - The Black Vault
A Case Study in NASA-DoD - The Black Vault
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
-124-<br />
When the MMS is shuttle launched, there should not be a large<br />
cost impact associated with <strong>in</strong>tegration and test<strong>in</strong>g for every new array,<br />
s<strong>in</strong>ce the shuttle imposes fewer size constra<strong>in</strong>ts and lower stresses<br />
(vibration, acoustic) than previous launchers.<br />
All of the MMS batteries and spacecraft loads are controlled by<br />
a s<strong>in</strong>gle PRU (see Fig. B-3). In the event of a s<strong>in</strong>gle battery cell<br />
MODULE STUCTURE<br />
INTRCFACE CONNECIOR<br />
ARRAY POWER<br />
C<br />
ARRAY POWER SENSORS DISCONN(CT 4 AUSILIAiT AIAV<br />
CNO CNlNG(<br />
GROUNO C1a1e POW(1<br />
10 eIT C O<br />
,AIG E IQ AS V fiel U SILICAL<br />
SSPOWER Ocet<br />
REGULATION SIGNAL 4 o ooe<br />
UNIT ) CONDITIONING 4 FiRO UON MIOULE<br />
IPRU) ASSueVLI I REVAI¢ VEu~[<br />
BT TERY<br />
CONT. ETC.,I<br />
OECO0(n Oa<br />
TOA(<br />
POUs<br />
@I<br />
S N SO R S<br />
$ I N$O l F R N I( E~ 1 1 1 (11<br />
CONRC COST. Re4 to CN MULE<br />
PFE SS PROTECTION I REN01[<br />
CURRENT(C<br />
(I ORe 3ESIiTfi<br />
Fig.C NS blck diagram--OEr<br />
uURoa 111101EloOOLC<br />
$ ( odule .-- 2 TtOe TO AI HN NO OS~l<br />
Fl l<br />
iISIOL[(OI<br />
Irl<br />
s J ~ I ,ist ~CRREN<br />
z.R it UNE(<br />
voltage; while this will underutilize the undamaged batteries by one<br />
cell out of 22, the total energy available will still be more than if<br />
the battery with the failed cell were placed off l<strong>in</strong>e. In the STPSS,<br />
In the three-battery case, two cells out of 66 are sacrificed because<br />
of the one cell failure, while open circuit<strong>in</strong>g a s<strong>in</strong>gle battery<br />
sacrifices 21 cells.
Change language