基于小波包能量特征向量的光纤布拉格光栅低速冲击定位

发布时间：2018-02-28 05:42

本文关键词： 光纤Bragg光栅(FBG) 小波包变换相似度匹配算法低速冲击定位　出处：《振动与冲击》2017年08期 　论文类型：期刊论文

【摘要】：光纤布拉格光栅(FBG)传感器在飞行器的实时冲击定位监测中具有广阔的应用前景。根据两次冲击位置距离越近接收到信号幅频特性相似度越高的关系,提出基于小波包能量特征向量与相似度匹配算法共同实现冲击定位的研究,构建了一套由光纤布拉格光栅传感器和复合材料层合板组成的冲击定位监测系统。首先通过遍布冲击建立能量特征向量数据库。然后通过试验点的能量特征向量与数据库中各点的能量特征向量进行相似度计算实现冲击定位。实验表明,对480 mm×480 mm的复合材料层合板的16次冲击定位实验中,该方法的最大误差为40 mm。
[Abstract]:Fiber Bragg grating (FBG) sensors have a broad application prospect in the real-time impact location monitoring of aircraft. According to the relationship between the proximity of the two impact positions and the received signal amplitude and frequency characteristics, the similarity of amplitude and frequency characteristics is higher. Based on wavelet packet energy feature vector and similarity matching algorithm, the research of impact location is proposed. A set of impact positioning and monitoring system composed of fiber Bragg grating sensor and composite laminated plate is constructed. Firstly, the energy eigenvector database is established through the spread of impact, and then the energy eigenvector of the test point is established. The impact location is realized by calculating the similarity between the energy eigenvector of each point in the database. The experiment shows that, The maximum error of this method is 40 mm. in 16 impact localization experiments of 480mm 脳 480mm composite laminated plates.
【作者单位】：东南大学江苏省工程力学分析重点实验室;东南大学土木工程学院;
【基金】：国家自然科学基金(11572086;11202050) 江苏省自然科学基金(BK2012318)
【分类号】：TB33

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