Abstract Passive health monitoring in real time is an effective approach to ensure the integrity and safety of aircraft composite structures. A two-step method based on a parameterized laminate model is proposed as a way to locate acoustic sources for laminates with stiffeners: calibration and monitoring, which requires neither prior knowledge of material parameters nor a large number of training samples. In step one, calibration is used to identify material parameters through acoustic emissions at three points with known locations prior to passive monitoring to ensure the accuracy of monitoring. Next in step two, monitoring is used to locate acoustic emission events with the calibrated model from step one. The arrival time of expansion waves extracted by Akaike Information Criterion is used as input features during the two-step method. The effect of stiffened components on the input feature was investigated with finite element methods and experiments. Finally, the proposed method was verified by experiments on an anisotropic stiffened composite laminate as the method was able to locate acoustic sources with high enough accuracy.

中文翻译：

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具有参数化层合模型的加筋复合结构被动定位方法

摘要 实时被动健康监测是保障飞机复合材料结构完整性和安全性的有效手段。提出了一种基于参数化层压板模型的两步法，作为一种定位带有加强筋的层压板声源的方法：校准和监测，既不需要材料参数的先验知识，也不需要大量的训练样本。第一步，在被动监测之前，通过校准在已知位置的三个点上通过声发射来识别材料参数，以确保监测的准确性。接下来在第二步中，使用来自第一步的校准模型进行监测以定位声发射事件。Akaike Information Criterion提取的膨胀波到达时间作为两步法的输入特征。用有限元方法和实验研究了加劲部件对输入特征的影响。最后，由于该方法能够以足够高的精度定位声源，因此通过对各向异性加筋复合层压板的实验验证了所提出的方法。