Composite laminates are widely used in various fields, but their structural properties make them prone to impact damage. Thus, the real-time localization of the impact source in composite laminates is of great importance. The signal energy-based approach for acoustic source localization, as a new technique proposed in recent years, has advantages in that it can be applied in the case of low signal-to-noise ratio and does not need to have knowledge of material properties. In this paper, an acoustic source localization technique for composite laminates based on an improved signal energy-based approach is proposed. The prior knowledge of the orientation of the symmetry axes of the composite laminate is not needed. The proposed approach is verified by numerical simulation and experiment. The results show that proposed approach has good stability and accuracy. The error analysis and suggestions for improving the feasibility of this technique are also given.

中文翻译：

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基于信号能量的复合材料层压板声源定位方法


复合材料层压板广泛应用于各个领域，但其结构特性使其容易受到冲击损坏。因此，复合材料层合板中冲击源的实时定位非常重要。基于信号能量的声源定位方法作为近年来提出的一项新技术，其优点是可以在低信噪比的情况下应用，并且不需要了解材料特性。本文提出了一种基于改进的基于信号能量的方法的复合材料层合板声源定位技术。不需要复合层压板对称轴方向的先验知识。通过数值模拟和实验验证了所提出的方法。结果表明，所提方法具有良好的稳定性和准确性。还给出了错误分析和提高该技术可行性的建议。