Efficient global robust optimization of unconstrained problems affected by parametric uncertainties

Journal article (2015)
Department
Precision and Microsystems Engineering (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: This article is published with open access at Springerlink.com
Kriging Robust optimization Parametric uncertainties Min-max optimization Expected improvement Worst-case design
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Published Date

13-05-2015

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Source:

Structural and Multidisciplinary Optimization, 52, 2015

ISSN:

1615-147X

Faculty

Mechanical, Maritime and Materials Engineering

Department

Precision and Microsystems Engineering

Abstract

A novel technique for efficient global robust optimization of problems affected by parametric uncertainties is proposed. The method is especially relevant to problems that are based on expensive computer simulations. The globally robust optimal design is obtained by searching for the best worst-case cost, which involves a nested min-max optimization problem. In order to reduce the number of expensive function evaluations, we fit response surfaces using Kriging and use adapted versions of expected improvement to direct the search for the robust optimum. The numerical performance of the algorithm is compared against other techniques for min-max optimization on established test problems. The proposed approach exhibits reliable convergence, is more efficient than previous methods and shows strong scalability.

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