文章介绍用于测定机床振动的采用跟踪滤波器的模拟式传递函数测量装置TFA和快速付利叶变换分析仪FFT,比较了两者的优缺点及应用范围。对影响检测结果的诸因素作了分析,探讨了提高传递函数精度的途径。阐述了运用曲线拟合计算固有频率、阻尼比和振动模态的方法,并举出了实例。 This paper introduces the TFA and FFT, which are used to measure the vibration of the machine tool, and the tracking filter is used to compare the advantages, disadvantages and applications of the two. The factors affecting the test results were analyzed, and the ways to improve the accuracy of the transfer function were discussed. The method of calculating natural frequency, damping ratio and vibration mode by using curve fitting is expounded and some examples are given.