LEVITATION MOVEMENT DEVICE, ULTRASONIC VIBRATOR USED FOR THE DEVICE, AND METHOD OF REGULATING VIBRATION CHARACTERISTICS OF THE VIBRATOR

摘要

A levitation movement device has a blade (110) attached to a body and having a front edge. The blade (110) is reciprocated in front-rear directions by an actuator and is twisted about the front edge for a predetermined time period between before and after the direction of movement of the reciprocating motion is reversed. Further, energy storage/supply mechanism (311) provided at the levitation movement device stores energy when torque required by the actuator for the reciprocating motion is smaller than a predetermined value, and supplies energy to the actuator when torque required by the actuator for the reciprocating motion is greater than the predetermined value. The peak of torque required by the actuator for flapping motion is reduced.