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System Synthesis in Preliminary Aircraft Design Using Statistical MethodsThis paper documents an approach to conceptual and early preliminary aircraft design in which system synthesis is achieved using statistical methods, specifically Design of Experiments (DOE) and Response Surface Methodology (RSM). These methods are employed in order to more efficiently search the design space for optimum configurations. In particular, a methodology incorporating three uses of these techniques is presented. First, response surface equations are formed which represent aerodynamic analyses, in the form of regression polynomials, which are more sophisticated than generally available in early design stages. Next, a regression equation for an Overall Evaluation Criterion is constructed for the purpose of constrained optimization at the system level. This optimization, though achieved in an innovative way, is still traditional in that it is a point design solution. The methodology put forward here remedies this by introducing uncertainty into the problem, resulting in solutions which are probabilistic in nature. DOE/RSM is used for the third time in this setting. The process is demonstrated through a detailed aero-propulsion optimization of a High Speed Civil Transport. Fundamental goals of the methodology, then, are to introduce higher fidelity disciplinary analyses to the conceptual aircraft synthesis and provide a roadmap for transitioning from point solutions to probabilistic designs (and eventually robust ones).
Document ID
19990087316
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
DeLaurentis, Daniel
(Georgia Inst. of Tech. Atlanta, GA United States)
Mavris, Dimitri N.
(Georgia Inst. of Tech. Atlanta, GA United States)
Schrage, Daniel P.
(Georgia Inst. of Tech. Atlanta, GA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1996
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: Congress of the International Council of the Aeronautical Sciences
Location: Sorrento
Country: Italy
Start Date: September 8, 1996
End Date: September 13, 1996
Sponsors: International Council of the Aeronautical Sciences
Funding Number(s)
CONTRACT_GRANT: NAG2-900
CONTRACT_GRANT: NAGw-4337
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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