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首页> 外文期刊>Applied optics >Wavelet packet energy characterization of low velocity impacts and load localization by optical fiber Bragg grating sensor technique
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Wavelet packet energy characterization of low velocity impacts and load localization by optical fiber Bragg grating sensor technique

机译：低速冲击的小波包能量表征和光纤布拉格光栅传感器技术对负载的定位

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摘要

The low velocity impacts (LVIs) monitoring based on optical fiber Bragg grating (FBG) sensors have attracted more attention in recent years. The center wavelength migrations of FBG sensors were determined by strain and residual strain during and after LVI on composite material structure. We presented a method to discriminate the energy characters of LVI response signals related to LVI locations. By analyzing the wavelet packet energy spectra of LVI response signals monitored by FBG sensors, the sixth node's energy was found to be sensitive to LVI location. Thus, the sixth node's energies as LVI feature values, were used to predict the LVI locations by the method of support vector regression (SVR). By optimization of the SVR models' free parameters, predicting accuracy was 4.62% in the work.
机译：近年来，基于光纤布拉格光栅（FBG）传感器的低速撞击（LVI）监视引起了更多关注。 FBG传感器的中心波长迁移由复合材料结构上LVI期间和之后的应变和残余应变确定。我们提出了一种方法来区分与LVI位置有关的LVI响应信号的能量特征。通过分析由FBG传感器监视的LVI响应信号的小波包能量谱，发现第六节点的能量对LVI位置敏感。因此，第六节点的能量作为LVI特征值，通过支持向量回归（SVR）方法被用来预测LVI的位置。通过优化SVR模型的自由参数，预测准确性在工作中为4.62％。

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