一、引言至今已有很多利用振动系统的自由响应或脉冲响应的方法识别该系统的复模态参数。但是,一般而言,光靠这些数据是无法得到该系统的完全复模态参数和物理参数(即质量矩阵,阻尼矩阵和刚变矩阵)的,因为用不同激励和不同系统的组合可得到相同的输出。然而对于单位脉冲响应来说,就不同了。它包含了系统的完整信息(事实上,此时的输入是已知的,即单位脉冲力),利用单位脉冲响应,我们不但可以得到系统的完全复模态参数,也能得到该系统的物理参数。 I. INTRODUCTION So far there have been many ways to recognize the complex modal parameters of a system using the free or impulse response of a vibrating system. However, in general, the complete complex modal and physical parameters of the system (ie, mass matrix, damping matrix, and rigid matrix) can not be obtained from these data alone because the same can be obtained with different combinations of excitation and different systems Output. However, for the unit impulse response, it is different. It contains the complete information of the system (in fact, the input is known at this time, that is, the unit impulse). Using the unit impulse response, we can not only get the complete complex mode parameters of the system, but also obtain the physical parameter.