Feasibility studies of damage monitoring technology using FBG sensor/PZT actuatorhybrid sensing system for aircraft structures

Abstract

This paper presents a part of feasibility studies of damage monitoring technology using FBG (Fiber Bragg Grating) sensor/PZT actuator hybrid sensing system for aircraft structures. Recently, weight reduction of aircraft is required for the energy saving due to the ecology problem. Therefore, the application of composite material as CFRP (Carbon Fiber Reinforced Plastic) laminate is required. However, composite materials have not yet well application for primary structures, because of the invisible fracture process and highly NDI cost. The structural health monitoring can be useful tool as a one of the verification method of the aircraft integrity and a novel NDI method. In present studies, we presented a concept of the damage monitoring using FBG sensor/PZT actuator hybrid sensing system. FBG optical fiber sensor and AWG type filter used to detect the damage by analyzing the information from elastic wave, which is propagated in material by the PZT actuator. Furthermore, the application area of the novel system was presented based on the results of conceptual aircraft design.