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Modal Parameter Identification Using Signal Decomposition in Time-Frequency Domain
Author(s): 
Pages: 389-394
Year: Issue:  4
Journal: JOURNAL OF VIBRATION ENGINEERING

Keyword:  随机信号模态参数辨识信号分解Gabor展开;
Abstract: 给出了基于响应信号Gabor展开与重构的模态参数辨识的时频分析方法.通过响应信号的展开与重构,单频特征振动可从复杂的响应信号中分离出来,由这些特征振动信号可进一步提取系统的模态振动参数.论述了频率、阻尼和特征振型的估计方法以及估计方法对系统响应信号的特殊要求.此方法可适用于平稳、非平稳的响应信号,且无需输入信号,属于环境激励下的一种参数辨识方法.仿真结果说明时频展开与重构方法是模态参数辨识的有效手段之一.
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