The parameters of explosion shock waves are one of the main criteria for evaluating the power of ammunition. However, during the actual testing process, the testing system may be damaged by fragments or other factors, making it unable to capture the complete signal and thus affecting subsequent damage assessment. Therefore, this article proposed a method based on bidirectional long short-term memory network (BiLSTM) and multi head self-attention module fusion to construct the integrity of incomplete shockwave signals. BiLSTM was used to analyze the local temporal dependencies of shockwave signals, and the multi head self-attention module captured frequency information in the signal. Finally, the fusion of temporal signals and frequency information was achieved, resulting in a complete shockwave signal. In the process of information collection, the measured signal data is usually only dozens of sets, which leads to the problem of small sample size. This article established a GAN network with LSTM units as the generator to expand the complete shock wave signal and enhance the dataset capacity. The experimental results based on the expanded dataset show that the MSE and MAE between the complete signal constructed by the method proposed in this paper and the original signal are 0.006 8 and 0.146 2, respectively, which are superior to the LSTM, BiLSTM, and CNN+BiLSTM methods. The method proposed in this paper meets the practical requirements for constructing incomplete shock wave signals.
LIRui, LIXiaochen, WANGQuan, et al. Propagation characteristics of blast wave in diminished ambient temperature and pressure environments[J]. Explosion and Shock Waves, 2023, 43(2): 18-28. (in Chinese)
ZHANGShuai, YANGRunhai, GAOErgen. Signal reconstruction method based on compressive sensing and its application in signal processing of air-gun sources[J].China Earthquake Engineering Journal, 2021, 43(2): 322-330. (in Chinese)
[7]
曹春红.压缩感知信号重建的相关理论及应用研究[D].湘潭: 湘潭大学, 2017.
[8]
蒙彬钧.基于压缩感知的数字全息聚焦重建方法研究[D].西安: 西安工业大学, 2023.
[9]
PENGY Y, QIAOW, QUL Y. Compressive sensing-based missing-data-tolerant fault detection for remote condition monitoring of wind turbines[J].IEEE Transactions on Industrial Electronics, 2022, 69(2): 1937-1947.
[10]
AMIRIM, JENSENR. Missing data imputation using fuzzy-rough methods[J].Neurocomputing, 2016, 205: 152-164.
[11]
PURWARA, SINGHS K. Hybrid prediction model with missing value imputation for medical data[J].Expert Systems with Applications, 2015, 42(13): 5621-5631.
FENGXiankai, HUANGShucheng. Research on missing value filling algorithm based on DBSCAN[J].Computer and Digital Engineering, 2020, 48(7): 1572-1575. (in Chinese)
[14]
HRONK, TEMPMM, FizmoserP. Imputation of missing values for compositional data using classical and robust methods[J].Computational Statistics & Data Analysis, 2010, 54(12): 3095-3107.
[15]
HANH, KIMB, KIMK, et al. Machine learning approach for the estimation of missing precipitation data: A case study of South Korea[J].Water Science and Technology, 2023, 88(3): 556-571.
[16]
李翼祺, 马素贞.爆炸力学[M].北京: 科学出版社, 1992.
[17]
YANGF, XUL X, ZHAIH B, et al.Numerical simulations of air shock wave overpressure propagation in shallow-buried explosion[J]. Journal of Physics: Conference Series, 2023, 2470(1): 012022.
YANGZhi, ZHANGZhijie, XIAYongle. Resconstruction of shock ware overpressure filed based on B-spline interpolation[J].Science Technology and Engineering, 2016, 16(7): 236-240. (in Chinese)
LITongyu, ZHANGJianzhong. A linear traveltime perturbation interpolation method for seismic ray tracing[J].Oil Geophysical Prospecting, 2018, 53(6): 1165-1174. (in Chinese)
[27]
尧礼辉. 广义逆矩阵计算及在矩阵方程中应用的研究[D].郑州: 解放军信息工程大学, 2008.
[28]
WANGH, CHENY F, OBOUÉY A S I,et al. Simultaneous reconstruction and denoising of extremely sparse 5-D seismic data by a simple and effective method[J]. IEEE Transactions on Geoscience and Remote Sensing, 2022, 60: 5909212.
ZHANGQinqin, LIUWenqiang, CHENZhihong, et al. Forecasting of river flow based on LSTM-SVM model[J].Journal of Tianjin Normal University(Natural Science Edition), 2023, 43(6): 45-52. (in Chinese)