Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Excitation and Measurement Points Selection to Identify Structural Parameters for Model Tuning

모델보정을 위한 구조물 매개변수 규명시 가진점 .측정점의 선정

  • Park, Nam-Gyu (Korea Advanced Institute of Science and Technology) ;
  • Park, Yun-Sik (Korea Advanced Institute of Science and Technology)
  • Published : 2000.05.01
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Abstract

A sensor placement technique to identify structural parameter was developed. Experimental results must be acquired to identify unknown dynamic characteristics of a targeting structure for the comparison between analytical model and real structure. If the experimental environment was not equipped itself properly, it can be happened that some valuable information are distorted or ill-condition can be occurred. In this work the index to determine exciting points was derived from the criterion of maximizing parameter sensitivity matrix and that to choose measurement points was from that of preserving the invariant of sensitivity matrix. This idea was applied to a compressor hull structure to verify its performance. The result shows that the selection of measurement and excitation points using suggested criteria improve the ill-conditioning problem of inverse type problems such , as model updating.

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References

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