C33 区分ハーモニックウェーブレット変換による非線形振動パラメータの同定(OS13 機械における非線形振動1)

概要

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Estimation of time-varying vibration parameters, that is, instantaneous damping and frequencies by the wavelet transform is based on the ridge identification and the phase extraction in the time-frequency map. However, the process of the ridge identification is rather complicated, and the most suitable mother wavelet to yield a time-frequency map for an efficient identification can not be determinately chosen. In this paper, the time-varying parameters pertaining to nonlinearities are successfully estimated by a segmental use of the harmonic wavelet. In addition, it is possible to identify nonlinear vibration parameters qualitatively and quantitatively by the time-varying parameters, using method of averaging which is a type of approximate method for the weakly nonlinear system.
一般社団法人日本機械学会の論文
2009-09-01