Experimental Identification of Mechanical Structure with Characteristic Matrices : Proposition of Curve Fitting in the Frequency Domain and MCK Identification Using Curve Fitting

• JEONG Weui Bong

  Tokyo Institute of Technology

• OKUMA Masaaki

  Tokyo Institute of Technology

• NAGAMATSU Akio

  Tokyo Institute of Technology

抄録

It is not always possible to obtain characteristic matrices from modal parameters obtained by experimental modal analyses, such as curve fitting. If the degrees of freedom of the mathematical model are different from those of the structure identified, which occurs in almost all cases, contradiction occurs between the modal parameters when transformed to physical parameters. This paper proposes certain constraints that modal parameters must satisfy in order to be transformed to mass, stiffness and damping matrices without contradiction. A nonlinear optimization technique is used to solve these contraints. A new multireference curve fitting method in the frequency domain is also proposed. The number of unknown parameter depend only on the number of degrees of freedom identified, regardless of the number of response points. This method is effective when there are a number of response points. some experimental models are examined to validate this method.

収録刊行物

• JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry

  JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry 32 (1), 30-35, 1989-03-15

  一般社団法人日本機械学会

キーワード

• System Identification
• Frequency Response Function
• Characteristic Matrices
• Curve Fitting
• Optimization
• Modal Parameter
• Physical Parameter

詳細情報

• CRID: 1573668926862218496
• NII論文ID: 110002505032
• NII書誌ID: AA10680610
• ISSN: 09148825
• 本文言語コード: en
• データソース種別:
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