| Citation: | ZHANG J B，XU X B，WANG X，et al. Data processing technology of balanced dynamic characteristics based on wavelet reconstruction[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（6）：1362-1371 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0441
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Forced vibration occurs in wind tunnel experiments, thus, the data measured by balance is the aliasing of forced vibration and the aerodynamic force of a model. This affects the accuracy of force data. To address this problem, data processing technology of balanced dynamic characteristics is proposed based on wavelet reconstruction. Acceleration sensors are installed on the model, with vibration data obtained by knocking model, and natural frequency analyzed by fast Fourier transform (FFT). The filtering threshold is determined, and then the wavelet reconstruction is used for filtering. Finally, the dynamic compensation coefficient is calculated by projection equation. The aerodynamic data measured by the balances compensated by the compensation coefficient. Through the analysis of the experimental data, model forced vibration interference data can be processed by balance dynamic characteristics based on wavelet reconstruction. This study shows important application potential of the proposed technology in engineering.
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