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Estimation of modal parameters using bilinear joint time-frequency distributions

机译:基于双线性联合时频分布的模态参数估计

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摘要

In this paper, a new method is proposed for modal parameter estimation using time-frequency representations. Smoothed Pseudo Wigner-Ville distribution which is a member of the Cohen's class distributions is used to decouple vibration modes completely in order to study each mode separately. This distribution reduces cross-terms which are troublesome in Wigner-Ville distribution and retains the resolution as well. The method was applied to highly damped systems, and results were superior to those obtained via other conventional methods.
机译:本文提出了一种使用时频表示的模态参数估计新方法。作为Cohen类分布的成员的平滑伪Wigner-Ville分布用于完全解耦振动模式,以便分别研究每种模式。这种分布减少了在Wigner-Ville分布中比较麻烦的交叉项,并且也保留了分辨率。该方法应用于高阻尼系统,其结果优于通过其他常规方法获得的结果。

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