Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Alan W. Wilhite"'
Publikováno v:
Journal of Spacecraft and Rockets. 58:1394-1405
Systems enabling long-duration crewed missions are expected to have high probabilities of success through sparing of components. To enable such systems, the tradeoff between reliability and mass ne...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58719a904b280fef812ec9ab1433eef8
https://doi.org/10.2514/1.a34849
https://doi.org/10.2514/1.a34849
Autor:
Alan W. Wilhite, Patrick Chai
Publikováno v:
Acta Astronautica. 102:35-46
In any manned mission architecture, upwards of seventy percent of all payload delivered to orbit is propellant, and propellant mass fraction dominates almost all transportation segments of any mission requiring a heavy lift launch system like the Sat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6526e7d1b8d9401de12fcec7548ef0df
https://doi.org/10.1016/j.actaastro.2014.05.013
https://doi.org/10.1016/j.actaastro.2014.05.013
Autor:
Alan W. Wilhite, Dale Arney
Publikováno v:
Journal of Spacecraft and Rockets. 51:1413-1429
Current space system architecture modeling frameworks use a variety of methods to generate their architecture definitions and system models but are either too manual or too limited in scope to effectively explore the architecture-level design space e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eaea34b7f85629458a8a7e89e79a5f5d
https://doi.org/10.2514/1.a32578
https://doi.org/10.2514/1.a32578
Publikováno v:
Acta Astronautica. 94:104-115
NASA has created a plan to implement the Flexible Path strategy, which utilizes a heavy lift launch vehicle to deliver crew and cargo to orbit. In this plan, NASA would develop much of the transportation architecture (launch vehicle, crew capsule, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40756e6c8b71572e3f7383e50bc5d647
https://doi.org/10.1016/j.actaastro.2013.07.011
https://doi.org/10.1016/j.actaastro.2013.07.011
Autor:
August T. Noevere, Alan W. Wilhite
Publikováno v:
57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference.
Optimizing an aerospace structure to meet stiffness requirements is challenging due to the complexity of finding a satisfactory stiffness distribution. For a high aspect-ratio structure such as a wing box, there are a multitude of stiffness distribut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4fbf287ff50a6f7aef155bd178be9e6
https://doi.org/10.2514/6.2016-0235
https://doi.org/10.2514/6.2016-0235
Publikováno v:
Acta Astronautica. 80:65-81
Habitable volume is an important spacecraft design figure of merit necessary to determine the required size of crewed space vehicles, or habitats. In order to design habitats for future missions and properly compare the habitable volumes of future ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07b40a6d92ba87b57bc16c93033757ac
https://doi.org/10.1016/j.actaastro.2012.04.041
https://doi.org/10.1016/j.actaastro.2012.04.041
Publikováno v:
Acta Astronautica. 66:1220-1236
Inert or dry mass in aerospace systems has historically grown during aerospace vehicle development because of a number of factors: changing requirements, uncertainty in the performance of the initial technology selection, addition of redundancy, erro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::034a443b8675f8e8bcef51347811c9bf
https://doi.org/10.1016/j.actaastro.2009.10.013
https://doi.org/10.1016/j.actaastro.2009.10.013
Publikováno v:
Acta Astronautica. 66:1237-1252
A lunar lander is designed to provide safe, reliable, and continuous access to the lunar surface by the year 2020. The NASA Exploration System Architecture is used to initially define the concept of operations, architecture elements, and overall syst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::948eee95127b25f416704e8e52f889bd
https://doi.org/10.1016/j.actaastro.2009.09.020
https://doi.org/10.1016/j.actaastro.2009.09.020
Autor:
Dale Arney, Alan W. Wilhite
Publikováno v:
Journal of Spacecraft and Rockets. 47:353-360
Many human lunar exploration architectures, both flown and conceptual, use at least one heavy-lift launch vehicle to deliver flight hardware to low Earth orbit. There exists a technology, however, that allows these large exploration missions to be pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16dcbf02a8eab2c507d8ec54871ab272
https://doi.org/10.2514/1.44532
https://doi.org/10.2514/1.44532
Publikováno v:
Journal of Spacecraft and Rockets. 47:361-370
This paper presents an analysis of the ascent stage to be used in future humanmissions toMars, commonly known as theMars Ascent Vehicle. The focus of the analysis is to minimize the initial mass, which must be delivered to lowEarth orbit to have a fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7cf9dd6b901cba2f042fe0f342e63a7
https://doi.org/10.2514/1.45101
https://doi.org/10.2514/1.45101