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Titre du Document
To reduce or to extend a spacecraft design lifetime?
Auteur(s)
SALEH Joseph H. ; TORRES-PADILLA Juan-Pablo ; HASTINGS Daniel E. ; ...
Résumé
The engineering and economic issues at stake for reducing or extending a complex system's design lifetime are investigated using a spacecraft as an example. These issues are examined from an operator perspective, a manufacturer's perspective, as well as from the perspective of society at large. The question of whether there is an optimal design lifetime for complex engineering systems in general, and spacecraft in particular, and what it takes to answer this question is addressed. Preliminary results indicate that optimal design lifetimes do exist that maximize a system's value metric. Therefore, even if it is technically feasible to field a system or launch spacecraft with a longer lifetime, it is not necessarily in the best interest of an operator, and definitely not in the interest of the manufacturer, to do so. Preliminary results also show that the design lifetime is, in the case of a spacecraft, a key requirement in sizing various subsystems and, consequently, has a significant impact on the overall cost of the spacecraft. Additionally, at the level of the entire space industry value chain, the spacecraft design lifetime is a powerful lever that can significantly impact the whole space industry's performance. Overall, it is shown that the selection of a spacecraft design lifetime begs careful consideration and requires much more attention than it has received so far in the literature because its impact will ripple throughout an entire industry value chain.
Editeur
American Institute of Aeronautics and Astronautics
Identifiant
ISSN : 0022-4650 CODEN : JSCRAG
Source
Journal of spacecraft and rockets A. 2006, vol. 43, n° 1, pp. 207-217 [11 pages]
Langue
Anglais
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