The development status of the base excitation method with PZT was introduced,and the problems existing in specific implementation methods were summarized.The PZT will be subjected to a transverse shearing force during the working process,re-sulting in damage to the PZT.The repeated deformation of the elastic base will cause the microstructure to fall off.A point-contact-ed movable base structure consisting of an upper connecting block with spherical crown grooves and a lower connecting block with spherical crown protrusions was designed.The elastic base with a cylindrical mounting body and three mounting arms was also de-signed.The base excitation device with PZT was fabricated.The dynamic testing system for microstructures was developed.The dy-namic characteristics of two kinds of microstructures were tested.The results show that the improved base excitation device with PZT can effectively excite the microstructures.
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