超磁致伸缩材料换能器的实验研究

Experimental study of super magnetostric material transducer

采用超磁致伸缩材料 Terfenol—D 作为换能器中制动元件,将在一定预压应力下处于阶跃段的磁致伸缩棒简化为磁场强度与磁致伸缩应变的单输入单输出的线性系统。以静态试验数据为基础,建立等效的动态磁致伸缩模型,对自行设计的超磁致伸缩大功率换能器进行了试验研究,该装置具有功率大、适用频带宽、峰值尖锐余振小等特点,为实际开发换能器产品提供了设计依据。

Terfenol—D bar is used in actutor and simplified as one input—one output linear system for equivalent dynamic magnetic—mechanical model. Based on test data about magnetostrict material in compression.the experimental study has been done of the super magnetostrict transducer ,which is characterized by many advantages such as large power, broad frequency bandwidths and small peak vibrations,etc, and which are applied to the design product.