Aircraft Wing Vibration Monitoring based on FBG Sensor Network

Abstract

In this paper, we present an FBG sensor network for monitoring aircraft wing vibration. The implemented FBG network allows the estimation of the vibration positions on the aircraft wings. Based on the measurements taken and if the wing vibration exceeds a preset threshold, the decision is made to reduce the aircraft's speed in order to decrease the vibrations. A series of laser pulses is transmitted to the deployed FBG arrays to achieve this goal. When an external strain is applied to the wing, the deployed FBG responds by shifting the reflected wavelength proportionally. A data acquisition module estimates the FBG displacement and fiber elongation in a given FBG point in the wing based on the wavelength of the reflected optical pulse.