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A Probabilistic Approach to Technology Identification, Evaluation, and Selection for Affordable Transport ConceptsMost grant goals were accomplished over the course of the grant, albeit only partial success was achieved in applying ASDL s existing advanced design methods to HAVOC. The limited success in applying ASDL's advanced design methods occurred due to: fundamental 20 of 197 limitations in the RSM metamodeling process used; the highly computationally intensive nature of HAVOC as compared to many other advanced system synthesis and sizing codes; and the highly curved nature of low I(sub sp) rocket system spaces. These challenges encountered during the grant led to ongoing efforts in more efficient and robust sequential metamodeling/surrogate optimization based advanced design methods which are expected to overcome all of the challenges encountered with RSM during the grant. Other achievements over the course of the grant included the documentation of the existing HAVOC cost module and formulation of new cost estimation relationships in support of APS analysis of 3rd Gen RLV. Further achievements beyond the scope of the grant as originally defined were also achieved such as HAVOC code and portability improvements, historical propulsion performance and reliability regression relationships, and new visualization routines to vacilitate visualization of HAVOC DOE case file results.
Document ID
20040000678
Acquisition Source
Ames Research Center
Document Type
Other
Date Acquired
August 21, 2013
Publication Date
December 14, 2003
Subject Category
Statistics And Probability
Funding Number(s)
CONTRACT_GRANT: NCC2-1193
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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