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Identification method of excitation force of rigid body vibration source by physical model identification

Authors :
Takahiro SHINOZAKI
Koichi HONKE
Source :
Nihon Kikai Gakkai ronbunshu, Vol 83, Iss 855, Pp 17-00176-17-00176 (2017)
Publication Year :
2017
Publisher :
The Japan Society of Mechanical Engineers, 2017.

Abstract

This paper proposes identification method of excitation force of rigid body vibration source by physical model identification. If the reworking occurs after the assembly of the prototype in mechanical product, the cost increases due to the retrofit countermeasures and development period extension. Pre-prediction of vibration at the design stage is important to avoid these problems. Prior prediction of vibration needs to grasp the excitation force of the vibration source. As conventional methods, the mount stiffness method and the matrix inversion method have been proposed. However, mount stiffness method calculates the mount transmission force. Therefore, if the development machine changes the structure, preliminary evaluation does not apply. The matrix inversion method can solve this problem. However, when the frequency response function contains a measurement error, the error spreading propagates in inverse matrix calculation. Therefore, in order to avoid the inverse matrix calculation, we propose identification method of excitation force of rigid body vibration source by physical model identification. In this paper, it was investigated features of the inverse matrix method and the identification method of excitation force by physical model identification using the basic experiment. As a result of study, the method by physical model identification showed that the influence of measurement error is smaller than the matrix inversion method. In addition, it showed that it is possible to identify the excitation force with fewer excitation points than the matrix inversion method.

Details

Language :
Japanese
ISSN :
21879761
Volume :
83
Issue :
855
Database :
Directory of Open Access Journals
Journal :
Nihon Kikai Gakkai ronbunshu
Publication Type :
Academic Journal
Accession number :
edsdoj.64a8b94b463d4067ac0898a37e9333fc
Document Type :
article
Full Text :
https://doi.org/10.1299/transjsme.17-00176