Development Acoustic Device using Giant Magnetostrictive Material: Fundamental Consideration on Output Performance Due to Differences in Material Properties

The ultra-compact electric vehicle EV uses an electric motor instead of a gasoline engine. This vehicle has the problem of interior space which is the noise input into the vehicle mainly consists of road and wind noise. Therefore, we propose an active noise control system using wall vibration generated by the giant magnetostrictive actuator (GMA). In this system, GMA is able to generate a high output by boundary wall surface vibration. In this paper, we created an analysis model of the GMA and considered output performance due to differences in material properties of the proposed GMA by electromagnetic field analysis.