DAP增强梁结构形状控制的机理研究

STATIC DEFORMATION OF A BEAM WITH DIRECTIONAL ATTACHED PIEZOELECTRIC ELEMENTS

  • 摘要: 对称粘贴在梁结构上下表面上的压电元件在外部电场的作用下能使梁结构发生弯曲变形. 通过分析驱动构件与结构中的应变分布,采用定向固定的压电元件(DAP, 即directional attached piezoelectric)来代替传统的压电元件(CAP, 即conventional attached piezoelectric),减小了驱动构件的横向效应,提高了压电驱动的效率,并进行了实验对比验证.

     

    Abstract: The rectangular beam with dual surface bondedpiezoelectric actuators can achieve a pure bending deformationby an external electric field. The strain distribution of the actuatorsand the beam are analyzed and based on the analytical expressionsof strains, the directional attached piezoelectric elements, instead ofthe conventional attached piezoelectric elements, are used as actuatorsto reduce their effective transverse stiffness and enhance the actuatingeffectiveness. In the end, the deformations of two beams withdirectionally attached piezoelectric elements and the conventionalpiezoelectric elements are compared by static experiments.

     

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