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http://dx.doi.org/10.5050/KSNVE.2016.26.5.609

Analysis of the Effect of the Grid Spacing on the Application of the Location Template Matching Method Using a Cantilever Beam  

Shin, Kihong (Department of Mechanical & Automotive Engineering, Andong National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.26, no.5, 2016 , pp. 609-615 More about this Journal
Abstract
Measuring similarity between two signals is a key element of the location template matching (LTM) method which is one of impact source localization technique. As a measure of similarity, the correlation coefficient is most widely used, and the group delay based method is recently proposed to improve the accuracy of finding the impact source. In practice, the LTM method assumes that the similarity between two signals decreases as the distance between two corresponding impact points increases, where the distance between two neighboring impact points defines the grid spacing. In this paper, it is shown that this assumption is not always true but the correlation coefficients fluctuate forming a main robe and many side robes as the distance between two neighboring impact points increases. On the other hand, the standard deviation of group delay sharply increases with a small increase of the grid spacing. These are demonstrated by using a simple cantilever beam. Based on these findings, an optimal way of implementing the LTM method may be suggested by combining the correlation coefficient and the group delay based approaches.
Keywords
Correlation Coefficient; Group Delay; Grid Spacing; Similarity Measure; Location Template Matching(LTM);
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Ing, R. K., Quieffin, N., Catheline, S. and Fink, M., 2005, In Solid Localization of Finger Impacts Using Acoustic Time-reversal Process, Applied Physics Letters, Vol. 87, No. 20, pp. 204104.   DOI
2 Pham, D. T., Al-Kutubi, M., Ji, Z., Yang, M., Wang, Z. and Catheline, S., 2005, Tangible Acoustic Interface Approaches, Proceedings of IPROMS 2005 Virtual Conference, pp. 497~502.
3 Sulaiman, A., Poletkin, K. and Khong, A. W. H., 2010, Source Localization in the Presence of Dispersion for Next Generation Touch Interface, 2010 International Conference on Cyberworlds (CW), pp. 82~86.
4 Yap, X., Khong, A. W. H. and Gan, W. S., 2010, Localization of Acoustic Source on Solids: A Linear Predictive Coding based Algorithm for Location Template Matching, 2010 IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), pp. 2490~2493.
5 Arun, K. R., Yap, X. and Khong, A. W. H., 2011, A Touch Interface Exploiting Time-frequency Classification Using Zak Transform for Source Localization on Solids, IEEE Transactions on Multimedia, Vol. 13, No. 3, pp. 487~497.   DOI
6 Shin, K., 2016, The Effect of the Number of Vibration Modes on the Application of the Location Template Matching (LTM) Method, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 26, No. 2, pp. 172~178.   DOI
7 Yang, H., Lee, S. K. and Shin, K., 2012, On the Practical Consideration of Source Localization Using the Location Template Matching (LTM) with Multiple Sensors, Applied Mechanics and Materials, Vol. 157-158, pp. 441~446.   DOI
8 Shin, K., Yang, H., Lee, S. K. and Lee, Y. S., 2013, Group Delay Based Location Template Matching Method for the Identification of the Impact Location on a Plate, Journal of sound and Vibration, Vol. 332, No. 8, pp. 2111~2117.   DOI
9 Shin, K., 2014, Comparative Study on the Measures of Similarity for the Location Template Matching(LTM) Method, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 24, No. 4, pp. 310~316.   DOI
10 Shin, K. and Hammond, J. K., 2008, Fundamentals of Signal Processing for Sound and Vibration Engineers, Wiley, Chichester.
11 Shin, K., 2016, Correlation Analysis of Transient Vibration Signals for the Location Template Matching Method, International Journal of Mechanical & Mechatronics Engineering, Vol. 16, No. 3, pp. 1~7.
12 Fahy, F. and Gardonio, P., 2007, Sound and Structural Vibration: Radiation, Transmission and Response, Second Edition, Academic Press, Oxford.