40. Structural Scheme of Electroelastic Actuator for Nanomechatronics

Structural scheme of the electroelastic actuator for nanomechatronics and its transfer functions was obtained. Changes in the elastic compliance and stiffness of the piezoactuator, accounting for the type of control, were found. The transfer functions of the piezoactuator for nanomechatronics with transverse, longitudinal, and shear piezoeffects and voltage or current control were also obtained. Electroelastic actuator based on electroelasticity with piezoelectric or electrostriction effects is used for nanomechatronics. The structural scheme of the piezoactuator obtained in this work reflects the transformation of electrical energy into mechanical energy, in contrast to Cady’s and Mason’s electrical equivalent circuits of piezotransducer. The study explains the direct piezoeffect on the acting voltage of the piezoactuator. Changes in elastic compliance due to the direct piezoeffect determine the structural scheme of the piezoactuator with feedback for nanomechatronics systems. For the structural scheme, we considered the inverse piezoeffect, the elastic flexibility of the variables, the stiffness of piezoactuator, the direct piezoeffects, and the counter electromotive force, depending on the speed of the movement of the piezoactuator face. To construct the structural scheme of the piezoactuator, we solved the inverse piezoeffect equation and the wave equation under appropriate boundary conditions for calculating the parameters of the nanomechatronics system with piezoactuator. Due to the reaction of the piezoactuator and considering the direct piezoeffect, the elastic compliance and rigidity of the piezoactuator are changed. The structural scheme of the piezoactuator is obtained, considering the inverse piezoelectric effect and the back electromotive force due to the direct piezoelectric effect. The transfer functions of the piezoactuators for nanomechatronics with the transverse, longitudinal, shear, generalized piezoeffects and with both voltage and current controls are obtained.