本文讨论了切削测力仪动态测量误差的描述方法,研究了减小误差的途径。误差源之一来自测力仪的频响特性,减小误差的方法在于限制测力仪对共最低阶固有频率比的使用频宽。另一误差来自附加惯性力,因为测量时机床结构以其某一阶固有频率振动,使测力仪获得一个不可忽略的加速度。利用信号处理技术对输出力进行惯性补偿,可有效地抑制这个误差。最后,提供了测力仪安装在机床上时简单易行地测量其频响函敦的方法。 This paper discusses the description of the dynamic measurement error of the cutting dynamometer, and studies the way to reduce the error. One of the sources of error comes from the frequency response of the dynamometer. The way to reduce the error is to limit the bandwidth used by the dynamometer for the total lowest natural frequency ratio. Another error comes from the additional inertia force, because the measurement of the machine tool structure with a certain natural frequency vibration, the dynamometer to obtain a non-negligible acceleration. The use of signal processing techniques for output inertia compensation, which can effectively suppress this error. Finally, it provides a simple way to measure the frequency response of a dynamometer mounted on a machine tool.