智能结构微位移测试及数值分析

对在压电陶瓷驱动下复合材料悬臂梁的静态变形及控制进行了试验研究.首先测试了复合材料基体和压电陶瓷片的材料常数;然后通过实验求得上下表面对称粘贴有分布式压电驱动器的复合材料悬臂梁静态位移与驱动电压间的非线性关系,所得结果与开发的4节点有限元计算结果相吻合.结果表明,利用压电陶瓷驱动器可对结构的微位移进行驱动,从而实现结构的精确定位.

Testing and Numeric Analysis of Micro-displacements in Pie-intelligent Structures

The static deformation and shape control of the composite material cantilever beam bonded with piezoelectric actuator has been studied experimentally.Firstly,the material constants of the hand-knitted matrix composites and the piezoelectrics are obtained experimentally.Secondly,the nonlinear relationships between the static deformations in the cantilever beam and the driving voltages in piezoelectric actuators are achieved by the established experiment system. The testing data agree well with the developed four-node finite element analysis results.The results show that the micro-displacements in the flexible structures can be drove by using piezoelectric actuators to realize the pinpoint location.