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Smart Structures and Systems
  Volume 8, Number 2, August 2011, pages 219-237
DOI: http://dx.doi.org/10.12989/sss.2011.8.2.219
 


Identification of multiple sources in a plate structure using pre-filtering process for reduction of interference wave
S.K. Lee, Y.S. Moon and J.H. Park

 
Abstract
    This paper presents novel research into the source localization of multiple impacts. Source localization technology for single impact loads in a plate structure has been used for health monitoring. Most of research on source localization has been focused only on the localization of single impacts. Overlapping of dispersive waves induced by multiple impacts and reflection of those waves from the edge of the plate make it difficult to localize the sources of multiple impacts using traditional source localization technology. The method solving the overlapping problem and the reflection problem is presented in the paper. The suggested method is based on pre-signal processing technology using band pass filter and optimal filter. Results from numerical simulation and from experimentation are presented, and these verify the capability of the proposed method.
 
Key Words
    plate; piezoelectronic sensor; multiple sources localization; reflection; optimal filter.
 
Address
S.K. Lee, Y.S. Moon and J.H. Park : Department of Mechanical Engineering, Inha University, 253 Yonghyun-Dong,Nam-Gu, Incheon 402-751, Korea
 

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