A Study on Giant Magnetostrictive Actuator Used in Active Noise Control System for Ultra-compact Electric Vehicles (Analytical Consideration on Output Performance of the Actuator)
摘要
The interiors of ultra-compact electric vehicles (EVs) can be uncomfortable owing to the noise caused by the road and wind. To address this issue, we propose an active noise control (ANC) system that uses a giant magnetostrictive actuator. The proposed system allows estimating ride comfort by analyzing the biological information of passengers and controlling the interior acoustic environment. The proposed ANC system employs wall-surface vibrations generated by a giant magnetostrictive actuator. We analytically investigated the thrust characteristics of giant magnetostrictive materials deformed by a magnetic field through electromagnetic field analysis. The results showed that the effect of thrust on frequency changes depends on the characteristics of the giant magnetostrictive material.