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1999 Fiscal Year Final Research Report Summary

SYSTEM IDENTIFICATION OF STRUCTURES BY WAVELET TRANSFORM

Research Project

Project/Area Number 10650242
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionKYOTO INSTITUTE OF TECHNOLOGY

Principal Investigator

SONE Akira  FACULTY OF ENGINEERING AND DESIGN, KYOTO INSTITUTE OF TECHNOLOGY, PROFESSOR, 工芸学部, 教授 (20197015)

Project Period (FY) 1998 – 1999
KeywordsIDENTIFICATION / EXPERIMENT / WAVELET TRANSFORM / STRUCTRAL PARAMETER / MEXICAN HAT
Research Abstract

In this research, a system identification technique for structures is proposed when the structures are damaged due to external disturbance such as earthquake. In order to detect the change of structural parameters like mass, stiffness and damping of structure, parametric system identification technique using wavelet analysis which provides the time-frequency analysis, is proposed and its validity is comformed through the numerical simulations and experiments. This method has the advantage such that without measuring acceleration response and veleocity response, the structural parameters are estimated by using only the displacement response. Furthermore, since the information of signal about time is obtained by the wavelet transform, the time-varying structural parameters can be identified. The results obtained from this research are summarized as follows.
(1) From the results obtained using two-degree-of freedom structure, five-degree-of freedom structure and simply supported beam modelled by finite elements, it is clear that the wavelet transform can effectively estimate the structural parameters.
(2) It has been proven that the change in stiffness and daping of structures can be identified by the proposed technique.
(3) The experimental results using one-story structure demonstrate that the proposed technique is viable for the identification of stiffness. We do not obtain good results compared with half power method in low damping case.
(4) Since the accuracy of identification depends on the sampling time for data, it is clear that the adequate samping time is required in order to overecome the disadvantage of wavalete transform.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 曽根彰: "入出力のウェーブレット変換を用いた多自由度系のパラメトリックのシステム同定"日本建築学会構造系論文集. 512. 61-66 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 曽根彰: "ウェーブレット変換による構造物のシステム同定"第10回日本地震工学シンポジウム論文集. 2. 2455-2460 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 曽根彰: "構造物の加速度応答のウェーブレット変換によるパラメトリックなシステム同定"日本機械学会機械力学・計測制御講演論文集. 98-8. 199-202 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akira Sone: "Identification Of Structural Parameters by Wavelet Analysis"Proceedings of Asian-Pacific Symposium on Structural Reliability and its Application. 249-258 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 瀬川柳太郎: "常時微動加速度観測波形のウェーブレット変換によるシステムパラメータの同定"日本建築学会構造系論文集. 519. 41-46 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akira Sone: "Identification Of Structural Parameters by Wavelet Transform of Acceleration Response"Proceedings of 1999 ASME Design Engineering Technical Conference. CD-ROM. 1-6 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] AKIRA SONE, SHIZUO YAMAMOTO AND ARATA MASUDA: "IDENTIFICATION OF STRUCTURAL PARAMETERS OF MDOF STRUCTURE BY WAVELET ANALYSIS"J. STRUCT. CONSTR. ENG. AIJ. 512. 61-66 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] AKIRA SONE, SHIZUO YAMAMOTO AND ARATA MASUDA: "SYSTEM IDENTIFICATION OF STRUCTURES BY USING WAVELET TARNSFORM"PROC. OF 10TH OF JAPAN SYMPOSIUM ON EARTH-QUAKE ENGINEERING. 2. 2455-2460 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] AKIRA SONE, SHIZUO YAMAMOTO AND ARATA MASUDA: "IDENTIFICATION OF STRUCTURAL PARAMETERS BY WAVELET ANALYSIS"PROC. OF ASIAN-PACIFIC SYMPOSIUM ON STRUC-TURAL RELLABILITY AND ITS APPLICATION. 249-258 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] RYOTARO SEGAWA, SHIZUO YAMAMOTO, AKIRA SONE, ARATA MASUDA AND HIROAKI HATA: "IDENTIFICATION OF STRUCTURAL PARAMETERS USING WAVELET TARNSFORM OF ACCELERATION RESPONSE OBSERVED BY MICROTREMOR"J. STRUCT. CONSTR. ENG. AIJ. 519. 41-46 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] AKIRA SONE, RYOTARO SEGAWA, SHIZUO YAMAMOTO, ARATA MASUDA AND HIROAKI HATA: "IDENTIFICATION OF STRUCTURAL PARAMETERS BY WAVELET TARNSFORM OF ACCELERATION RESPONSE"PROC. OF ASME DESIGN ENGINEERING TECHNICAL CONFERENCE. CD-ROM. 1-6 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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