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

本研究的主要目的是设计、实现和应用一个全光谱询问器，用于在高数据采集速率下工作的光纤光栅传感器，以及解释所获取的光谱数据所需的相关信号处理算法。询问器和传感器系统的性能将在两个应用中进行评估：(1)在多次低速冲击事件下编织复合材料试样的亚表面损伤状态识别；(2)粘合复合材料接头的结构健康监测。基于反演和信号处理算法唯一识别损伤条件的能力，FBG传感器光栅结构（剖面）也将针对这两种损伤识别和结构健康监测情况进行优化。这项研究计划是由北卡罗来纳州立大学机械与航空航天系和杨百翰大学电气与计算机工程系的研究人员合作完成的。pi还将与两所大学的项目合作，为工程和科学本科职业培养多样化的学生。

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.