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首页> 外文期刊>Computer-Aided Civil and Infrastructure Engineering >A Two-Dimensional Plum-Blossom Sensor Array-Based Multiple Signal Classification Method for Impact Localization in Composite Structures
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A Two-Dimensional Plum-Blossom Sensor Array-Based Multiple Signal Classification Method for Impact Localization in Composite Structures

机译：基于二维梅花传感器阵列的复合结构冲击定位多信号分类方法

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摘要

The growing use of composite materials on aircraft structures has attracted much attention for the impact monitoring as a kind of structural health monitoring method. Uniform linear sensor array (ULSA)-based multiple signal classification (MUSIC) technology is a promising method because of its directional scanning ability and easy arrangement of the sensor array. However, the monitoring range of ULSA-based MUSIC method is 0 degrees-180 degrees, and its beamforming properties degrade at angles close to 0 degrees and 180 degrees. Besides, the ULSA-based MUSIC methods proposed require the knowledge of the direction dependent velocity profile obtained by additional experiments. This article presents a novel two-dimensional (2-D) plum-blossom sensor array (PBSA)-based MUSIC method. First, the velocity propagating at the specific direction is estimated by impact signal itself using PBSA directly. Second, 2-D PBSA-based MUSIC method well realizes omnidirectional 0 degrees-360 degrees impact localization of composite structures. Experimental results show its successful performance on epoxy laminate plate and complex composite structure.
机译：作为一种结构健康监测方法，复合材料在飞机结构上的使用日益广泛，已经引起了冲击监测的广泛关注。基于统一线性传感器阵列（ULSA）的多信号分类（MUSIC）技术是一种很有前途的方法，因为它具有定向扫描功能并且易于布置传感器阵列。然而，基于ULSA的MUSIC方法的监视范围是0度至180度，并且其波束成形特性在接近0度和180度的角度处劣化。另外，提出的基于ULSA的MUSIC方法需要通过附加实验获得的与方向有关的速度分布图的知识。本文提出了一种新颖的基于二维（2-D）梅花传感器阵列（PBSA）的MUSIC方法。首先，直接使用PBSA根据撞击信号本身估算在特定方向上传播的速度。其次，基于二维PBSA的MUSIC方法很好地实现了复合结构的全方位0度至360度冲击定位。实验结果表明，它在环氧层压板和复杂的复合结构上具有成功的性能。

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