Results 251 to 260 of about 133,335 (273)

Surrogate Based Optimization for Multidisciplinary Design

SAE Technical Paper Series, 2011
<div class="section abstract"><div class="htmlview paragraph">When designing components of an aircraft, such as wing or nozzle, the physics involved cover several areas of engineering, such as weights, aerodynamics or thermal engineering. They often individually lead to different solutions. This makes multidisciplinary design difficult. The
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Multi-Level Surrogate-Based Airfoil Shape Optimization

51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013
Robust and computationally efficient airfoil shape optimization algorithm is presented. Our technique exploits a set of computational fluid dynamics (CFD) models of increasing discretization density that are sequentially optimized with the optimal design of the “coarser” model being the initial design for the “finer” one.
Slawomir Koziel, Leifur Leifsson
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Small antenna design using surrogate-based optimization

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
In this work, design of small antennas using efficient numerical optimization is investigated. We exploit variable-fidelity electromagnetic (EM) simulations and the adaptively adjusted design specifications (AADS) technique. Combination of these methods allows us to simultaneously adjust multiple geometry parameters of the antenna structure of interest
Slawomir Koziel, Adrian Bekasiewicz
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Surrogate-Based Optimization of Biogeochemical Transport Models

AIP Conference Proceedings, 2010
First approaches towards a surrogate‐based optimization method for a one‐dimensional marine biogeochemical model of NPZD type are presented. The model, developed by Oschlies and Garcon [1], simulates the distribution of nitrogen, phytoplankton, zooplankton and detritus in a water column and is driven by ocean circulation data.
Malte Prieβ, Thomas Slawig, Theodore E. Simos, George Psihoyios, Ch. Tsitouras   +4 more
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Surrogate-Based Optimization of Microstrip Broadband Antennas

2014
In this chapter, we demonstrate the use of physics-based SBO techniques for the design of microstrip broadband antennas. A popular approach to make microstrip broadband antenna responses is to use thick multilayer substrates and extra, so-called parasitic, patches. For antennas of such a structure, the primary design tasks are matching in the frequency
Slawomir Koziel, Stanislav Ogurtsov
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Surrogate Based Design Optimization of Aerostat Envelope

AIAA Lighter-Than-Air Systems Technology (LTA) Conference, 2013
To improve performance, decrease costs and enhance safety in aerospace systems, typical design processes involve time consuming and computationally expensive high fidelity models. In this context, use of surrogate-based approach can play a vital role in analysis and optimization.
Darshit M. Mehta, Rajkumar S. Pant, Sunil Lakshmipathy, Sawan Suman   +3 more
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Formulations for Surrogate-Based Optimization Under Uncertainty

9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, 2002
In this paper, several formulations for optimization under uncertainty are presented. In addition to the direct nesting of uncertainty quantification within optimization, formulations are presented for surrogate-based optimization under uncertainty in which the surrogate model appears at the optimization level, at the uncertainty quantification level ...
Michael Eldred, Anthony Giunta, Steven Wojtkiewicz, Timothy Trucano   +3 more
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Surrogate based EA for expensive optimization problems

2007 IEEE Congress on Evolutionary Computation, 2007
Real life optimization problems often require finding optimal solution to complex high dimensional, multimodal problems involving computationally very expensive fitness function evaluations. Use of a population based iterative technique like evolutionary algorithms in such problem domains is thus practically prohibitive. An attractive alternative is to
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Surrogate-Based Optimization Using Parametric Response Correction

2016
In this chapter, we briefly describe several parametric response correction techniques and illustrate their application for solving design optimization problems in various engineering disciplines such as electrical engineering, antenna design, hydrodynamics, and aerodynamic shape optimization.
Slawomir Koziel, Leifur Leifsson
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Surrogate Based Optimization of Functionally Graded Plates

Ibero-Latin American Congress on Computational Methods in Engineering (CILAMCE)
Functionally Graded Materials (FGM) are composites, usually made of ceramic and metal, in which the volume fraction of their constituents varies smoothly along an interest direction. These materials were initially proposed as a solution for the development of thermal barriers, but are currently used in different applications.
null Igor de Oliveira Lima, null Evandro Parente Junior   +1 more
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