Control of elastic displacement in piezoelectric-based intelligent plate subjected to thermal load

Abstract

The present paper discusses an intelligent solid-state actuator which can control a distribution of the elastic displacement at the submicro order, in the case where temperature changes in the surrounding medium induces elastic deformation in the actuator. The intelligent actuator consists of an isotropic structural plate to which a piezoelectric ceramic plate is perfectly bonded. First, by analyzing an inverse problem of piezothermoelasticity, the temperature change of the surrounding medium is inferred from the electric potential on the piezoelectric ceramic plate. Next, analysis of a direct piezoelastic problem leads to an appropriate electric potential applied to the piezoelectric ceramic plate which suppresses the induced normal elastic displacement on the free surface of the isotropic plate. Finally, numerical results are illustrated graphically.