Abstract
Piezoelectric elements are often used as actuators and sensors. In the case that the target is flexible structure, a piezoelectric element should be attached to the position where the curvature is large because the electromechanical coupling coefficient of the piezoelectric element becomes large value. However, the improvement is usually insufficient. To improve the value drastically, a new technique of attachment of a piezoelectric element which uses spacers was proposed in this paper. The optimum height of the spacers was formulated, and the relationship between the value and the size of the piezoelectric element were investigated in the theoretical analysis. The effectiveness of the proposed method and the theoretical analysis were validated by calculation and experiment.
