Multi-fidelity EM simulations and constrained surrogate modelling for low-cost multiobjective design optimisation of antennas

Slawomir Koziel, Ari T. Sigurdsson

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

14 Tilvitnanir (Scopus)

Útdráttur

In this study, a technique for low-cost multi-objective design optimisation of antenna structures has been proposed. The proposed approach is an enhancement of a recently reported surrogate-assisted technique exploiting variable-fidelity electromagnetic (EM) simulations and auxiliary kriging interpolation surrogate, the latter utilised to produce the initial approximation of the Pareto set. A bottleneck of the procedure for higher-dimensional design spaces is a large number of training data samples necessary to construct the surrogate. Here, the authors propose a procedure that allows us to confine the model domain to the subset spanned by the reference points, including the extreme Pareto-optimal designs obtained by optimising the individual objectives as well as an additional design that determines the Pareto front curvature. Setting up the surrogate in the constrained domain leads to a dramatic reduction of the required number of data samples, which results in lowering the overall cost of the optimisation process. Furthermore, the model domain confinement is generic, i.e. applicable for any number of design goals considered. The proposed technique is demonstrated using an ultra-wideband monopole antenna optimised with respect to three objectives. Significant reduction of the design cost is obtained as compared to the reference surrogate-assisted algorithm.

Upprunalegt tungumálEnska
Síður (frá-til)2025-2029
Síðufjöldi5
FræðitímaritIET Microwaves, Antennas and Propagation
Bindi12
Númer tölublaðs13
DOI
ÚtgáfustaðaÚtgefið - 31 okt. 2018

Athugasemd

Publisher Copyright:
© The Institution of Engineering and Technology 2018.

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