一般综合阻尼系统的时序模型

本文研究在一般情况下同时计及粘性阻尼和结构阻尼的系统模态分析和时模型。阐明系统在状态空间中的性质,推导出位移传递函数的表达式。应用拉氏换和Z变换间关系,得到系统的ARMA时间序列模型,从而提供了用频域法和序法来识别该系统模态参数的途径。

A TIME SERIES MODEL FOR GENERAL SYNTHETIC DAMPED SYSTEM

This paper presents a research on the modal analysis and the time serics model. for the general synthetic damped system which takes into account both viscous damping and structural damping. The representation for the transfer function matrix is derived by means of the properties of this system in the state space Through the relationship of Laplace transform and Z-transform, the ARMA time series model for this system is obtained. Therefore, a theoretical basis for identifying the modal parameters of this system is providcd by the methods of frequency. domain and time series.