【摘要】 根据减速器、泵、机床等机械系统整体振动加速度作为时间序列，来建立ARMA（2，1）模型。并利用时序模型参数与模态参数之间的关系，求解振动系统的模态参数。重点讨论了用时域法对系统固有频率和阻尼系数的识别问题。更多还原

【Abstract】 An ARMA(2,1) model was established taking the vibration accelleration ofwhole mechanical system, which included the gear-box, the pump and the machine tool, as atime series. And the relation between model parametersxif time series and the modalparameters was used to obtain the modal parameters of the vibration system. The identifica-tion problem of natural frequency and damping coefficient of the system in time series meth-od was emphatically discussed.更多还原