(一)、引言在工程上,一台机器或仪器的动态特性可以从机械阻抗的实测数据中获得。为确定模型中的各个参数,常用的方法是以正弦激振力作为输入量,结构的振动响应作为输出量,然后研究其频率特性。但为了测得整个频率范围中的频率响应,必须采用扫频过程。本文建议一种确定有关模型参数的直接计算法。事先只需进行三次简单测试。 (A), Introduction In engineering, the dynamic characteristics of a machine or instrument can be obtained from the measured data of mechanical impedance. In order to determine the parameters of the model, a common method is to use the sinusoidal excitation force as input, the vibration response of the structure as the output, and then study the frequency characteristics. However, in order to measure the frequency response over the entire frequency range, the sweep process must be used. This article suggests a direct method of determining the parameters of a model. Just three simple tests in advance.