Miniaturization of Self-running Rectangular Ultrasonic Actuators

Abstract

Various kind of driving units are frequently used in office machines, which sometimes require the reduction in size and capability of accurate positioning. A self-running linear actuator using piezoelectric resonators have been proposed. To design the desirable actuator size for this purpose, dimensional contributions of the elements are studied by solving resonant frequency and displacement amplitude by the finite element modeling, in which the effect of the loading is ignored. The relationship between the size and resonant frequency or amplitude displacement together with the prototype's experiments are derived. It is proved that much smaller actuators could be developed the driving units in office machines.