Multi-source data fusion method based on radial basis function generative adversarial network

Aerodynamic data of aircraft can be obtained through methods such as numerical simulations, wind tunnel tests, and flight tests. However, obtaining high-fidelity aerodynamic data with low uncertainty at a low cost remains a challenging problem. In deep learning methods, multi-layer neural networks can represent and combine features in higher dimensions, effectively integrating relevant features from different data sources to improve the model's prediction accuracy and reliability. However, the existing methods still face numerous technical challenges when fusing features from different datasets. To address this issue, we propose a multi-source data fusion method based on Radial Basis Function Generative Adversarial Network (RBFGAN)—RGAN-MSFM. This method can fuse aerodynamic datasets from different sources, mining the complementarity and correlation between multi-source aerodynamic data features. The proposed method first uses RBFGAN to fuse complementary state features from different data sources to generate a new fused dataset. Then, functional and contextual networks are constructed to explore the correlation among the data sources, enabling fusion learning of multi-source data features. We designed two sets of simulation experiments based on datasets containing CFD and wind tunnel test data, as well as CFD and flight test data. The experimental results show that after data feature fusion using this model, the accuracy of the datasets improved by an average of 30.2% and 67.5%; compared with traditional data fusion methods, the uncertainty was reduced by 23.9% and 27.6%, respectively.