直交 2 方向の構造共振の複合に関する研究

抄録

Some ultrasonic friction motors uses mechanical structure resonance frequency of two modes to generate ellipse motion on contact point. It is said that energy efficiency of such ultrasonic motors is high because of use of resonant frequency. However there are no detail reports whether their efficiency is really high or not. The paper investigates experimentally what phenomena occur when two modes resonance frequency of a vibration mechanism are matched and when the mechanism is excited in two directions simultaneously. An experimental vibration mechanism which has the same structure in two orthogonal directions are manufactured and driven under some different driving conditions, e.g. frequency, amplitude or phase of sinusoidal excitation. Then some interesting results such as every driving condition gives influence on resulting vibration status are obtained.