Collaborative Proposal: Full-Spectral Interrogation of Fiber Bragg Grating Sensors for Damage Identification

这项研究的主要目的是设计、实现和应用一种全光谱询问器，用于在高数据采集速率下工作的FBG传感器以及解释所采集的光谱数据所需的相关信号处理算法。该询问器和传感器系统的性能将从两个方面进行评估：(1)识别机织复合材料试件在多次低速冲击事件下的亚表面损伤状态；(2)监测复合材料粘接接头的结构健康状况。基于反演和信号处理算法唯一识别损伤条件的能力，还将针对这两个损伤识别和结构健康监测案例中的每一个对FBG传感器栅格结构(轮廓)进行优化。这项研究计划是北卡罗来纳州立大学机械和航空航天系和杨百翰大学电气和计算机工程系的研究人员共同努力的结果。PI还将与两所大学的项目合作，为不同的学生为工程和科学本科生的职业生涯做准备。

The major aim of this research is to design, implement and apply a full-spectral interrogator for FBG sensors operating at high data acquisition rates and the associated signal processing algorithms required to interpret the acquired spectral data. The performance of the interrogator and sensor system will be evaluated for two applications: (1) the identification of sub-surface damage states in woven composite specimens subjected to multiple low-velocity impact events and (2) structural health monitoring of bonded composite joints. The FBG sensor grating structure (profile) will also be optimized for each of these two damage identification and structural health monitoring cases based on the ability of the inversion and signal processing algorithms to uniquely identify damage conditions. The research plan is a collaborative effort between researchers in the Mechanical and Aerospace Department at North Carolina State University and the Department of Electrical and Computer Engineering at Brigham Young University. The PIs will also work in collaboration with programs at the two universities to prepare diverse students for engineering and scientific undergraduate careers.