基于高阶Prony方法的包装系统模态参数识别

Modal Parameter Identification of Packaging System Using High Order Prony Method

包装系统可看作是多自由度系统,将该系统的暂态响应信号用Prony方法进行拟合,可求出系统各模态参数.介绍了确定系统阶数的方法,并且利用高阶Prony模型和时反信号可在噪声中准确求出各模态参数.模拟结果表明,本方法具有良好的稳健性,可用于识别包装系统的阶数和各模态参数.

Paekaging system can be modeled as a multi-degree system,and the modal parameters can be obtained by fitting the transient signal to the Prony model. The method of deciding the number of the order is discussed,and the modal parameters can be got accurately from the noise using the higher order Prony model and the time backward method. The simulation indicates that the method is robust and can be used to estimate the modal parameter of the packaging system.