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Open AccessArticle

Impact Location on a Fan-Ring Shaped High-Stiffened Panel Using Adaptive Energy Compensation Threshold Filtering Method

by Yibo Li 1,*, Zhe Wang 1, Xiaobo Rui 1, Lei Qi 1,2, Jiawei Liu 1 and Zi Yang 3
1
State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072, China
2
Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
3
Department of Materials Science and Engineering, The Ohio State University, 2041 N. College Road, Columbus, OH 43210, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(9), 1763; https://doi.org/10.3390/app9091763
Received: 30 March 2019 / Revised: 25 April 2019 / Accepted: 25 April 2019 / Published: 28 April 2019
(This article belongs to the Special Issue Structural Damage Detection and Health Monitoring)
The increase in the number of space debris is a serious threat to the safe operation of in-orbit spacecraft. The propagation law of the impact signal in the stiffened panel of the spacecraft’s sealed bulkhead is very complicated, and there is less research on the impact source location in the high-stiffened panel. In this paper, an adaptive energy compensation threshold filtering (AECTF) method based on acoustic emission is proposed, which can realize large-scale, fast and accurate locating of the impact source on the stiffened panel with less resource consumption. The influence law of the stiffeners on the lamb wave is analyzed by finite element simulation, and the Lamb wave energy factor curve is obtained. The correctness of the simulation is verified by the locating experiment on the impact point. The results show that the proposed AECTF method has better adaptability and can correctly locate the impact points in complicated locations. By selecting the appropriate frequency band to filter the signal, the locating accuracy and stability can be improved. When the frequency band is 100–200 kHz, the locating result is optimal, the average absolute error is 7.0 mm, the average relative error is 0.86%, and the error standard deviation is 3.5 mm. This study will generate fresh insight into the impact location technology of high-stiffened panel and provide a reference for the in-orbit spacecraft health monitoring system. View Full-Text
Keywords: AECTF method; high-stiffened panel; lamb wave; energy factor; impact source location AECTF method; high-stiffened panel; lamb wave; energy factor; impact source location
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Li, Y.; Wang, Z.; Rui, X.; Qi, L.; Liu, J.; Yang, Z. Impact Location on a Fan-Ring Shaped High-Stiffened Panel Using Adaptive Energy Compensation Threshold Filtering Method. Appl. Sci. 2019, 9, 1763.

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