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A new adaptive multi-fidelity metamodel method using meta-learning and Bayesian deep learning

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Structural and Multidisciplinary Optimization Aims and scope Submit manuscript

Abstract

To reduce the computational cost, multi-fidelity (MF) metamodel methods have been widely used in engineering optimization. Most of these methods are based on the standard Gaussian random process theory; thus, the time cost required for hyperparameter estimation increases significantly with an increase in the dimension and nonlinearity of the problems especially for high-dimensional problems. To address these issues, by exploiting the great potential of deep neural networks in high-dimensional information extraction and approximation, a meta-learning-based multi-fidelity Bayesian neural network (ML-MFBNN) method is developed in this study. Based on this, to further reduce the computational cost, an adaptive multi-fidelity sampling strategy is proposed in combination with Bayesian deep learning to sequentially select the highly cost-effective samples. The effectiveness and advantages of the proposed MF-MFBNN and adaptive multi-fidelity sampling strategy are verified through eight mathematical examples, and the application to model validation of computational fluid dynamics and robust shape optimization of the ONERA M6 wing.

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Abbreviations

\(\nabla\) :

Gradient

\(\mathcal{L}\) :

Loss function

\(\theta\) :

Network parameters

\(\varphi\) :

Network initial parameters

\(\theta^{ - }\) :

Parameters of the network other than the output layer

\({\mathbf{w}}^{L}\) :

The weights of the Lth layer of the network

\({\mathbf{b}}^{L}\) :

The deviations of the Lth layer of the network

x:

Input vector

y:

Response vector

\(D\) :

Sample dataset

\(f\left( \cdot \right)\) :

Bayesian neural networks

\(f_{{{\varvec{\uptheta}}}} \left( {\mathbf{x}} \right)\) :

Output of Bayesian neural networks

HF:

High-Fidelity

LF:

Low-Fidelity

ML:

Meta-learning

BNN:

Bayesian Neural Network

MF:

Multi-fidelity

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Acknowledgements

The work was supported by National Natural Science Foundation of China [grant number 52175214] and Basic Research Program of Equipment Development Department [grant number 514010103-302].

Funding

National Natural Science Foundation of China, 52175214; The basic research program, 514010103-302

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Correspondence to Fenfen Xiong.

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The authors declare that they have no conflict of interest.

Replication of results

The results shown in the manuscript can be reproduced. Example in Sect. 4.1 was uploaded to as supplementary material. The remaining examples are easy to implement by changing the response functions and samples based on the codes provided to obtain the results shown in the manuscript.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Responsible Editor: Ramin Bostanabad

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Xiong, F., Ren, C., Mo, B. et al. A new adaptive multi-fidelity metamodel method using meta-learning and Bayesian deep learning. Struct Multidisc Optim 66, 58 (2023). https://doi.org/10.1007/s00158-023-03518-8

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  • DOI: https://doi.org/10.1007/s00158-023-03518-8

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