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

The Society of Naval Architects of Korea (대한조선학회)
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A Basic Study on Structural Health Monitoring using the Kalman Filter

칼만 필터를 이용한 구조 안전성 모니터링에 관한 기초 연구

  • Park, Myong-Jin (Department of Naval Architecture and Ocean Engineering, INHA University) ;
  • Kim, Yooil (Department of Naval Architecture and Ocean Engineering, INHA University)
  • 박명진 (인하대학교 조선해양공학과) ;
  • 김유일 (인하대학교 조선해양공학과)
  • Received : 2020.11.28
  • Accepted : 2020.04.09
  • Published : 2020.06.20
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Abstract

For the success of a structural integrity management, it is essential to acquire structural response data at some critical locations with limited number of sensors. In this study, the structural response of numerical model was estimated by data fusion approach based on the Kalman filter known as stochastic recursive filter. Firstly, transient direct analysis was conducted to calculate the acceleration and strain of the numerical standing beam model, then the noise signals were mixed to generate the numerical measurement signals. The acceleration measurement signal was provided to the Kalman filter as an information on the external load, and the displacement measurement, which was transformed from the strain measurement by using strain-displacement conversion relationship, was provided into the Kalman filter as an observation information. Finally, the Kalman filter estimated the displacement by combining both displacements calculated from each numerically measured signal, then the estimated results were compared with the results of the transient direct analysis.

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References

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