Impact and vibration monitoring method of composite flexible structures based on FBG sensor network

Jian Kang; Jie Zeng; Xiaohua Guo; Xiaojing Gong; Tongwei Li; Junsong Yu; Kai He

doi:10.1117/12.2295308

10 January 2018 Impact and vibration monitoring method of composite flexible structures based on FBG sensor network

Jian Kang, Jie Zeng, Xiaohua Guo, Xiaojing Gong, Tongwei Li, Junsong Yu, Kai He

Proceedings Volume 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications; 106180U (2018) https://doi.org/10.1117/12.2295308
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

Aiming at the low-speed impact load localization and vibration testing requirements of aerospace composite flexible structure, The Fiber Bragg Grating sensor network monitoring system is established. The increasing sampling technique is used to process the impact response signal, then the generalized cross-correlation delay estimation method is used to extract the time difference relationship between the sensor response signals. On this basis, the rapid identification of the impact position of the composite flexible structure is realized by considering the position information of the sensor comprehensively. The experimental results show that the area of six impact sample points and the specific coordinates of the location can be accurately identify respectively by this method. The average error of the coordinate positioning is about 3cm. The self-vibration mode and the natural frequency of the composite structure are achieved by using Fiber Bragg Grating sensor network monitoring system simultaneously. The finite element model of the composite structure with triangular section is established by using Patran. The natural frequency of the simulation is in good agreement with the experimental result, which proves that the Fiber Bragg Grating sensor has good vibration test performance.

Citation Download Citation

Jian Kang, Jie Zeng, Xiaohua Guo, Xiaojing Gong, Tongwei Li, Junsong Yu, and Kai He "Impact and vibration monitoring method of composite flexible structures based on FBG sensor network", Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 106180U (10 January 2018); https://doi.org/10.1117/12.2295308

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KEYWORDS

Composites

Fiber Bragg gratings

Sensors

Demodulation

Fiber optics sensors

Sensor networks

Optical fibers

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