精密直线压电驱动器的设计与研究

针对现有直线驱动器精度及输出位移受限等问题,该文基于改进的尺蠖原理,以压电陶瓷堆为动力源设计了一种新型精密直线驱动器。首先介绍该驱动器的结构原理、运行过程及实现方式,然后对该驱动器所用压电陶瓷的特性进行分析,并采用ANSYS对主要部件进行有限元分析。本驱动器采用特有柔性铰链结构和柔性箝位片设计结构,可实现双向移动和输出位移不受限,有效弥补了现有驱动器的一些不足,实用价值较高,有望在微驱动领域推广与应用。

Design and Research on the Precise Linear Piezoelectric Actuator

The existing piezoelectric driver has disadvantage of low accuracy, complex structure and limited output displacement and so on .Based on the improved inchworm principle, a new linear actuator which uses piezoelectric stack as power source is designed in this paper. First, the structure principle and operation process of the drive is presented, and piezoelectric properties of the driver and the implementation approach are introduced. Then finite element analysis (FEA) is carried out on the main components using ANSYS. Its unique flexible hinge structure and the flexible diaphragm structure design in the clamping mechanism, make the mechanism compact, flexible movement, fast response, reliable clamping, stable work, to make up for some deficiencies of existing actuators. The driver has a high practical value, can realize two way movement, and the output displacement is unlimited, which will be popularized and applied in the field of micro driving.