円板内の磁気粘性流体によって可変慣性モーメントをもつ制振装置

抄録

Vibration control devices, such as a semiactive damper, are common use for vibration reduction. In general, many of them have a controllable flexibility, damping and friction. The authors have developed variable inertia damper by using Magneto-Rheological (MR) fluid with long by-pass pipe in a previous study. In this study a new type vibration control device which is having variable moment of inertia by the MR fluid inside a flywheel is developed. The moment of inertia of a rotating body is depended on own mass and a radius of gyration. The MR fluid is filled into the flywheel, and magnetic field is applied to the flywheel by electromagnets. If the radius of gyration is switched because ferrite particles of the fluid are clustered when magnetic field is applied, the vibration control device can have a variable moment of inertia effect. In order to confirm the effect, resisting force characteristics of the vibration control device were investigated, and to confirm validity of the vibration suppression, vibration tests of one degree-of-freedom system with the vibration control device were carried out. Finally, feasibility study and the effect of variable moment of inertia for vibration suppression were confirmed.