超小型EV用アクティブノイズコントロールシステムの開発

―有限要素法による超磁歪アクチュエータの出力性能評価に関する基礎的検討―

抄録

Recently, Ultra-compact electric vehicles are now on sale that use electric motors as their driving source, which have less impact on the global environment. This vehicle has low rigidity on the outside. Therefore, road and wind noise generated while driving become interior noise. To solve this problem, we have proposed an active noise control system for ultra-compact electric vehicles using boundary vibration by giant magnetostrictive actuator. In the proposed system, the giant magnetostrictive actuator generates a high output using boundary-wall surface vibration. In this study, we developed a model of the giant magnetostrictive actuator and analyzed, by electromagnetic field analysis, output performance. From the result, in the development of giant magnetostrictive actuator for ultra-compact EV, we found that the selection of permanent magnets and giant magnetostrictive material is important to ensure stable output in the road noise frequency band.