Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Vibration Source Signal Identification of Structures Using ICA

ICA 기법을 이용한 구조물의 진동원 신호 규명

  • Kim, Kookhyun (Dept. of Naval Architecture, Tongmyong University) ;
  • Kwon, Hyuk-Min (Dept. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Cho, Dae-Seung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Jae-Ho (Agency for Defense Development) ;
  • Jun, Jae-Jin (Agency for Defense Development)
  • Received : 2012.09.17
  • Accepted : 2012.11.21
  • Published : 2012.12.20
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Abstract

Independent component analysis (ICA) technique based on statistical independency of the signals is known as suitable to identify the source signals by measuring and separating mixed signals through transfer paths and has successfully applied in the field of medical care, communications and so forth. In this study, the ICA technique is introduced for the identification of excitation sources from measured vibration signals of structures, which can be done by evaluating negentropy of centered and whitened vibration signals and correlation of separated signals. To validate the method, numerical analyses are carried out for a plate and a cylinder structure. The results show that the method can be applied efficiently to source identification of complex structures. Nevertheless, additional studies would be required to complement problems of occasional inaccuracy.

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References

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