Active Vibration Absorber for Vibration Transmission in Car Structure

초록

In-wheel motors, a core technology for next-generation mobility, may cause technical challenges, such as whine noises due to high-frequency vibrations. Conventional passive methods are inefficient to control such vibrations, characterized by broad and rapidly varying frequency ranges, due to the limited frequency bandwidth and the restricted suppression level. Therefore, this study explores active vibration control (AVC) using ring-type piezoelectric actuators to address the challenges in passive control. The proposed system employed the filtered-x LMS (FxLMS) algorithm that adaptively suppresses unwanted vibrations at the frequency range from 500 Hz to 1100 Hz. We validated the investigated method through an experimental setup with a test rig that simulates a suspension system with an in-wheel motor. The AVC system could reduce the vibration level by about 11 dB under a frequency sweeping condition, highlighting the effectiveness of piezoelectric actuators. This study will provide the potential for AVC as an alternative methodology, demonstrating its feasibility for future integration into electric vehicle technologies. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

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