Reduction of applied electric potential controlling thermoelastic displacement in a piezoelectric actuator

The present paper discusses how to reduce the applied electric potential wh ich controls a distribution of the elastic displacement, when temperature c hange induces elastic deformation in a piezoelectric-based solid state actu ator. The actuator consists of an isotropic structural plate, onto which mu ltiple piezoelectric ceramic plates of crystal class 6mm are perfectly bond ed. The analysis of this thermoelastic problem leads to electric potential applied to piezoelectric ceramic plates. Numerical calculations are carried out for an isotropic steel plate, onto which multiple cadmium-selenide pla tes are perfectly bonded. Finally, it is shown that the maximum applied ele ctric potential in the case of ten cadmium selenide plates can be reduced t o 11% of that derived from the previous study of a similar problem of one c admium selenide plate bonded onto an isotropic steel plate.