2006 Fiscal Year Final Research Report Summary
Research of dynamic force identification for model-based diagnosis approach
| Project/Area Number |
17560207
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
KAWAMURA Shozo Toyohashi University of Technology, Faculty of Engineering, Professor, 工学部, 教授 (00204777)
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| Co-Investigator(Kenkyū-buntansha) |
MINAMOTO Hirofumi Toyohashi University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20273328)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Dynamic Force / Inverse Analysis / Boundary Element Method / Model-Based Diagnosis / Diagnosis |
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| Research Abstract |
The force acting on a machine or a structure must be identified when they are designed or in case of condition monitoring and diagnosis. One of the force identification methods is based on the equation of motion. The method has a problem that the identified force is distributed over the structure in case of unique structure. In this study, the identification method is improved, in which the accurate responses can be obtained under some constraints. The method is numerically and experimentally checked and it is shown that the method is useful for actual application.
Another force identification method is based on the frequency response function. The method is very useful although it requires the information of location of force acting. In this study, the identification method is improved by physical consideration to apply the case with no information of location of force. The method is numerically checked and it is shown that the method was useful in the case without noise in the measured data.
Moreover, the stepwise diagnosis method is proposed. Firstly, the location where abnormality may happen is estimated using the force identification approach. After that, the cause of abnormality is identified. Four types of abnormality, that are crack, change of Young's modulus, change of density and additional impulsive force, are considered and the applicability of the proposed method is numerically and experimentally checked. It is shown that the method is useful for the primary diagnosis in the actual application.
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Research Products
(8 results)
