磁気応答性材料を用いた振動低減装置の小型化・低消費電力化に関する研究

抄録

We designed and manufactured a dynamic vibration absorber using magneto-rheological elastomer and verified the vibration mitigation effect for automobile seats. In this research, inner and outer housings of previous dynamic absorber were re-designed and fabricated. The material of the inner housing changed from aluminum to resin to reduce its weight. Further, the shape of the inner housing also changed from cylindrical shape to rectangular parallelepiped shape for its ease installation. In addition, due to the change of the shape of the outer housing, the inner housing which becomes the path of magnetic field lines was made using thin steel plates. Experimental results showed that the natural frequency of the coil which works as a movable mass of the absorber could be controlled by the magnitude of the applied electric current. Results also showed that the absorber could mitigated the vibration of the seat for a wide range of the engine speed by applying suitable electric current to the coil based on the engine speed.