超音波リニアモータを用いた制振手法の研究

Abstract

This study describes a method for vibration suppression with an ultrasonic linear motor using a piezoelectric element. Previously a few methods for vibration suppression by using piezoelectric elements were studied. For example, vibration were suppressed by transforming the vibrational energy into the electro energy, or applying the opposite phase vibration to the object. However, the former method does not always have enough efficiency, and the latter usually needs complicated feedback control system. Thus, the present study proposes a simple method for vibration suppression. The method contact the tip of a linear motor, which is excited ultrasonic vibration, on the surface of a vibration damping object in the perpendicular direction to its own vibration. Previously, one of the authors has demonstrated that the discontinuous contacts with an ultrasonic excited linear motor can suppress the vibration of a structure.By using a cantilever equipment, this study shows detail conditions in which such a damping effect occurs, and its availability under various condition.