基于压电传感器的复合材料结构局部损伤检测
Local Area Damage Detection in Composite Structures Using Piezoelectric Transducers
摘要：
提出了一种用于结构健康监测的集成化和自动化智能结构方法，该方法利用压电换能器阵列连接到结构上或嵌入结构中，用于驱动和传感。该系统通过在所需频率范围内对多个致动器进行宽带激励来主动询问结构。然后，通过计算每个致动器/传感器对之间的传递函数来表征结构的振动特征，并将其与基线特征进行比较。实验结果应用该系统的MD Explorer旋翼机复合材料柔性梁的局部区域损伤检测。
英文摘要：
An integrated and automated smart structures approach for structural health monitoring is presented, utilizing an array of piezoelectric transducers attached to or embedded within the structure for both actuation and sensing. The system actively interrogates the structure via broadband excitation of multiple actuators across a desired frequency range. The structure's vibration signature is then characterized by computing the transfer functions between each actuator/sensor pair, and compared to the baseline signature. Experimental results applying the system to local area damage detection in a MD Explorer rotorcraft composite flexbeam are presented.
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