用于原点阻抗测量的改进锤击法

Improved Impact Method for Driving Point Impedance Measurement

机械阻抗是机械系统特性的集中参数表示,是解决机械系统耦合问题的一个重要工具。现有的机械阻抗方法有激振器激振传感器和冲击锤敲击实验结构等,但都有各自的局限性。文章提出改进的锤击法测量原点阻抗。通过试验对比,对该法的可行性进行研究,结果证明该方法可以快速并较为准确地获得结构的原点阻抗,具有工程实用性。

Mechanical impedance is a concentrated parameter representation of the mechanical system characteristics, which is an important tool to solve the mechanical system coupling problem. The existing mechanical impedance measurement methods are using exciter or impact testing method, but have their own limitations. In the paper, an improved impact method is proposed to measure the driving point impedance. The feasibility of the method is proved by the experimental comparison. It is proved that the method can obtain the driving point impedance of the structure quickly and accurately, and it has engineering practicability.