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FROM:
John E. Theisinger and Dr. Robert D. Braun (Georgia Institute of Technology, Atlanta, Georgia, 30332-0150), “Multiobjective Hypersonic Entry Aeroshell Shape Optimization”, (publisher and date not given in the pdf file. Probably an AIAA paper presented at one of the Structures, Structural Dynamics and Materials Meetings. The most recent reference is January 2007.)
ABSTRACT: A capability has been developed that utilizes multiobjective optimization to identify hypersonic entry aeroshell shapes that will increase landed mass capability. Aeroshell shapes are parameterized using non-uniform rational B-splines to generate complete aeroshell surfaces. Hypersonic aerodynamic objectives and constraints are computed by numerically integrating pressure coefficient distributions obtained using Newtonian flow theory. An integrated optimization environment is created using iSIGHT with single- and multiobjective evolutionary algorithms. Results are presented based on optimization using constraints derived from the aeroshell for the Mars Science Laboratory mission. Resulting solutions clearly demonstrate the trade-offs between drag-area, static stability, and volumetric efficiency for this particular mission.
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