VIBRATION STRUCTURE AND ACTUATOR INCORPORATING VIBRATION STRUCTURE AND METHOD OF CONTROLLING NATURAL FREQUENCY OF VIBRATION STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a vibration structure which can generate a linear electric force in accordance with a vibration displacement of an inertia body. SOLUTION: A vibration structure is composed of a resilient member 22 having one end connected to a support end 21, an inertia body 23 adapted to vibrate via a resilient force of the resilient member 22, a movable electrode 28 attached to the inertia body 23, an electrode 24 coupled to a support end 21', for controlling an effective rigidity, and a power supply source 27 for generating electric force between the electrodes 24, 28. The vibration structure can control the natural frequency only by changing applied voltage since the generated electric force linearly changes in accordance with a displacement of the inertia body 23.