Identification of the Dynamic Properties of Mechanical Joints

Tie Neng Guo; Ting Yu Wu; Xiao Lei Song

doi:10.4028/www.scientific.net/AMM.468.114

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 468Identification of the Dynamic Properties of...

Identification of the Dynamic Properties of Mechanical Joints

Abstract:

The frequency response functions (FRFs) are frequently used to identify dynamic properties of the mechanical joints. However, the ill-posed problems of the system are caused by the contamination of measurement noise even if it is processed by reduction technique. In order to solve this problem, put the noised FRFs into identification equations to theoretical derivation, explained the degree of influence on the identified results by noised FRFs in theory. In order to make the identified results represent real properties of the joints, an improved FRFs method was developed based on subtraction term frequency selection, in which the measured data were processed could get high degree of anti-noise frequency before parameters identification. This method avoids the occurrence of ill-posed problems. The results of simulation show that the proposed method can solve the ill-posed problems, thus significantly improve the accuracy of identification.

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Periodical:

Applied Mechanics and Materials (Volume 468)

Pages:

114-118

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.468.114

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Online since:

November 2013

Authors:

Tie Neng Guo, Ting Yu Wu*, Xiao Lei Song

Keywords:

Frequency Response Function, Mechanical Joints, Parameters Identification, Subtraction Term Frequency Selection Method

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References

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