Detection of Impact Location for Composite Stiffened Panel Using FBG Sensors

Abstract:

We carried out experiments to detect impact locations on a composite plate using two types of composite plates, a composite flat plate with a constant thickness of 5 mm and a composite stiffened panel with stringers. Four multiplexed FBG sensors were attached to the bottom surface of the composite plates to acquire impact signals. The FBG sensor wavelength shift data were collected at a sampling frequency of 40 kHz using a high-speed FBG interrogator (SFI-710, Fiberpro Inc., Korea). The arrival times of the impact signals at each FBG sensor were obtained using a signal processing procedure. The arrival times were affected by noise level and signal-to-noise ratio. In order to overcome this weakness, signal processing techniques such as wavelet decomposition, normalization using each noise level and filtering with a moving average were adopted. To calculate the impact locations of the composite plate, a neural network algorithm was applied.

• Periodical: Advanced Materials Research (Volumes 123-125)
• Pages: 895-898
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.123-125.895
• Online since: August 2010
• Authors: Sang Oh Park, Byeong Wook Jang, Yeon Gwan Lee, Yoon Young Kim, Chun Gon Kim, Chan Yik Park, Bong Wan Lee
• Keywords: Composite Stiffened Panels, FBG Sensor, Impact Location Detection

References

[1] W.B. Spillman and P.L. Fuhr, Impact detection and location system for smart skins applications, Proceedings of SPIE, 1990, v. 2370, pp.308-315.

DOI: 10.1117/12.24848

[2] J.A. Greene, T.A. Tran, A. Murphy and R.O. Claus et al., Optical Fiber Sensing Technique for Impact Detection and Location in Composites and Metal Specimens, Smart Materials and Structures, 1995, v. 4, pp.93-99.

DOI: 10.1088/0964-1726/4/2/004

[3] J.K. Shaw, J.S. Sirkis, E.J. Friebele, R.T. Jones and A.D. Kersey, Model of Transverse Plate Impact Dynamics for Design of Impact Detection Methodologies, Journal of AIAA, 1995, v. 33, no. 7, pp.1327-1334.

DOI: 10.2514/3.12553

[4] P.M. Schindler, R.G. May and R.O. Claus, Location of Impacts on Composite Panels by Embedded Fiber Optic Sensor and Neural Network Processing, Proceedings of SPIE, 1995, v. 2444, pp.481-489.

DOI: 10.1117/12.207698

[5] D.U. Sung, J.H. Oh, C.G. Kim, Impact monitoring of smart composite laminates using neural network and wavelet analysis, Journal of intelligent material systems and structures , 2000, v. 11, no. 3, pp.180-190.

DOI: 10.1106/n5e7-m37y-3mar-2kfh

[6] J.R. LeClerc, K. Worden, W.J. Staszewski, Impact detection in an aircraft composite panel-A neural-network approach, Journal of Sound and Vibration , 2007 , v. 299, no. 3, pp.672-682.

DOI: 10.1016/j.jsv.2006.07.019