Aerodynamic force measurement algorithm based on U-Net in maglev flight wind tunnel

Deng Guoyao; Hu Zhe; Xu Dejun; Zhang Jun; Ni Zhangsong

doi:10.7638/kqdlxxb-2024.0197

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Aerodynamic force measurement algorithm based on U-Net in maglev flight wind tunnel

更新时间：2026-05-28

- Aerodynamic force measurement algorithm based on U-Net in maglev flight wind tunnel
- Vol. 44, Issue 2, Pages: 59-67(2026)
- 作者机构：
  
  成都流体动力创新中心,成都,610071
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2024.0197
  CLC： V211.74;TP18;V212.1
- Published：2026
- 稿件说明：
移动端阅览
邓果垚, 胡喆, 许德军, 等. 基于U-Net的磁浮飞行风洞气动力干扰剥离算法[J]. 空气动力学学报, 2026, 44(2): 59−67.

Deng Guoyao, Hu Zhe, Xu Dejun, et al. Aerodynamic force measurement algorithm based on U-Net in maglev flight wind tunnel[J]. 2026, 44(2): 59-67.
邓果垚, 胡喆, 许德军, 等. 基于U-Net的磁浮飞行风洞气动力干扰剥离算法[J]. 空气动力学学报, 2026, 44(2): 59−67. DOI： 10.7638/kqdlxxb-2024.0197

Deng Guoyao, Hu Zhe, Xu Dejun, et al. Aerodynamic force measurement algorithm based on U-Net in maglev flight wind tunnel[J]. 2026, 44(2): 59-67. DOI： 10.7638/kqdlxxb-2024.0197.

摘要

运动模型加速阶段的气动力测量技术是磁浮飞行风洞中的关键技术难题之一。气动力测量天平在加速段受到惯性力等各种强干扰，致使被测气动力值被掩盖。为在强干扰、低信噪比的严苛条件下还原气动力信号，提出了一种基于深度学习的气动力干扰剥离算法。首先针对天平信号作短时傅里叶变换以确定各干扰频谱特征，从而作为算法模型输入；然后构建“编码器-解码器”架构模型对天平所测复杂信号进行特征提取并精准重建所期望的气动力信号。经过在测试集上的全面评估，该算法在气动力干扰剥离方面表现优秀，在阻力、升力、俯仰力矩三分量上的气动力信号重建精度达到了92.7%。本研究提出的方法为磁浮飞行风洞加速段的气动力测量问题提供了一种可行的技术途径。

Abstract

The aerodynamic force measurement technology during the acceleration phase of the motion model is one of the key technical challenges in the maglev flight wind tunnel. The aerodynamic force measurement balance is subjected to various strong interferences such as inertial forces in the acceleration section

which masks the measured aerodynamic force values. In order to restore the aerodynamic force signal under the harsh conditions of strong interference and low signal-to-noise ratio

this study proposed an aerodynamic force interference stripping algorithm based on deep learning. Firstly

the short-time Fourier transform was applied to the balance signal to determine the spectral characteristics of each interference

which was used as the input of the algorithm model. Then

an "encoder-decoder" architecture model was constructed to extract features from the complex signals measured by the balance and accurately reconstruct the desired aerodynamic force signal. After a comprehensive evaluation on the test set

the proposed algorithm demonstrated excellent performance in aerodynamic interference stripping

achieving a corresponding reconstruction accuracy of approximately 92.7% for the drag

lift

and pitching moment components. This study provides strong support for the aerodynamic force measurement in the future test environment of the maglev flight wind tunnel.

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references

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