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首页> 外文期刊>Mechanical systems and signal processing >Identification of modal parameters of a system with high damping and closely spaced modes by combining continuous wavelet transform with pattern search
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Identification of modal parameters of a system with high damping and closely spaced modes by combining continuous wavelet transform with pattern search

机译：通过将连续小波变换与模式搜索相结合来识别高阻尼和密排模式系统的模态参数

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摘要

First, the free-decay response (FDR) of a system is established using all the initial identification results obtained by continuous wavelet transform (CWT) method. Then, the initial identification results are corrected using the pattern search method with the residual sum of squares between the FDR and the actually measured free-decay signal as the objective function. An integrated method based on both CWT and pattern search is thus developed for more accurate identification of modal parameters of a system with high damping and closely spaced modes. Both simulation and experimental results indicate that the proposed method can be used to achieve more accurate identification of modal parameters in a shorter sampling period of time.
机译：首先，使用通过连续小波变换（CWT）方法获得的所有初始识别结果来建立系统的自由衰减响应（FDR）。然后，使用模式搜索方法以FDR和实际测量的自由衰减信号之间的残差平方和为目标函数，对初始识别结果进行校正。因此，开发了一种基于CWT和模式搜索的集成方法，用于更精确地识别具有高阻尼和紧密间隔模式的系统的模态参数。仿真和实验结果均表明，该方法可用于在更短的采样时间内更准确地识别模态参数。

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