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Improving variable-fidelity surrogate modeling via gradient-enhanced kriging and a generalized hybrid bridge function

Han, Zhong-Hua and Görtz, Stefan and Zimmermann, Ralf (2013) Improving variable-fidelity surrogate modeling via gradient-enhanced kriging and a generalized hybrid bridge function. Aerospace Science and Technology, 25 (1), pp. 177-189. Elsevier. doi: 10.1016/j.ast.2012.01.006. ISSN 1270-9638.

Full text not available from this repository.

Abstract

Variable-fidelity surrogate modeling offers an efficient way to generate aerodynamic data for aero-loads prediction based on a set of CFD methods with varying degree of fidelity and computational expense. In this paper, direct Gradient-Enhanced Kriging (GEK) and a newly developed Generalized Hybrid Bridge Function (GHBF) have been combined in order to improve the efficiency and accuracy of the existing Variable-Fidelity Modeling (VFM) approach. The new algorithms and features are demonstrated and evaluated for analytical functions and are subsequently used to construct a global surrogate model for the aerodynamic coefficients and drag polar of an RAE 2822 airfoil. It is shown that the gradient-enhanced GHBF proposed in this paper is very promising and can be used to significantly improve the efficiency, accuracy and robustness of VFM in the context of aero-loads prediction.

Item URL in elib:https://elib.dlr.de/77479/
Document Type:Article
Title:Improving variable-fidelity surrogate modeling via gradient-enhanced kriging and a generalized hybrid bridge function
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Han, Zhong-HuaUNSPECIFIEDUNSPECIFIED
Görtz, StefanUNSPECIFIEDUNSPECIFIED
Zimmermann, RalfUNSPECIFIEDUNSPECIFIED
Date:March 2013
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:25
DOI :10.1016/j.ast.2012.01.006
Page Range:pp. 177-189
Publisher:Elsevier
ISSN:1270-9638
Status:Published
Keywords:Kriging, Variable-Fidelity, surrogate modeling, CFD, aerodynamics, loads
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Görtz, Stefan
Deposited On:29 Apr 2013 16:23
Last Modified:26 Mar 2015 13:25

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