Design of Piezoelectric Actuator Based on Adaptive Projectile

Abstract

Adaptive projectile is intelligent ammunition that adopts optical, mechanical, electrical, material and other high-tech and takes simple guidance or adaptive way of trajectory. It can sensitively recognize the target and automatically attack the target. Aiming at the requirements of the adaptive projectile, a novel piezoelectric actuator is designed in this paper. Through certain technology, ceramic rod is made by piling up and sintering piezoelectric ceramic chip, and four ceramic rods are evenly fixed along the circumference on the backplane of the actuator, then the four ceramic rods are applied with different size, positive and negative voltage, the linear displacement is coupled by spherical linkage and angular displacement can be output at the predetermined position of the cross circumference. Based on the design, the mechanical model and piezoelectric heap coupling mathematical model of actuator are made. After calculating, piezoelectric ceramic heap of type PST150/14/120VS20 should be used. In theory, under the condition of static state and no-load, a maximum angular displacement output of 4.5 degrees can be achieved. After numerical simulation, when the head angle is 4.5 degrees, the range extending rate of the adaptive shell can reach 80%.