LARGE STROKE PIEZO ACTUATOR

摘要

An actuator device configured to provide a large stroke output. The actuator device including a first piezo element and a second piezo element disposed within a housing. The first piezo element and the second piezo element having a combined long dimension and a height, wherein the long dimension is greater than the height. A fluid region containing a hydraulic fluid is defined in the piezo actuator element at a mid-point of the long dimension and extending parallel with the height of the piezo actuator element. An amplifier including a piston element is slidably coupled to the fluid region. The amplifier provides a large stroke output of the piston element at a mid-point of the long dimension of the piezo actuator elements in response to displacement of the fluid within the fluid region when under the influence of an applied voltage.