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

本研究的主要目的是设计，实施和应用全光谱的FBG传感器工作在高数据采集速率和相关的信号处理算法所需的解释所获得的光谱数据。将针对两个应用评估传感器和传感器系统的性能：（1）识别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;（2）粘接复合材料接头的结构健康监测。FBG传感器光栅结构（轮廓）也将根据反演和信号处理算法唯一识别损伤条件的能力，针对这两种损伤识别和结构健康监测情况中的每一种进行优化。该研究计划是北卡罗来纳州州立大学机械和航空航天系以及杨百翰大学电气和计算机工程系的研究人员之间的合作努力。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职业做好准备。

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.