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该文讨论利用多点自由衰减响应测量数据识别结构模态参数的Prony识别方法。为了解决噪声干扰情况下的参数估计有偏性和定阶问题,采用了扩阶特征矩阵法的思想。文中对Prony模态参数识别方法的理论和实施过程进行了阐述,并应用Prony方法对某仪器舱模型进行了模态参数识别。
This paper discusses the Prony identification method that uses the multi-point free-decay response measurement data to identify structural modal parameters. In order to solve the parameter estimation bias and order problem in the case of noise interference, the idea of extended eigen-matrix method is adopted. In this paper, the theory and implementation process of Prony modal parameter identification method are described, and modal parameter identification of a model of cabin is carried out by Prony method.