Evaluation of Smart Piezoelectric Composite Material-Based Active Vibration Cancellation (AVC) System Performance For Highway Driving Vibration of Vehicle Interior Using Time-Frequency Wavelet Transform

초록

This study presents the development and evaluation of an Active Vibration Cancellation (AVC) system utilizing smart piezoelectric composite materials, specifically Macro Fiber Composites (MFC), to mitigate vehicle interior vibrations during highway driving. The AVC system generates out-of-phase vibrations to counteract the predominant z-axis vibrations experienced during high-speed driving. The system was tested through simulated vibration experiments at 80 km/h and 100 km/h, with data analyzed using time-frequency continuous Wavelet transform (CWT), fourier transform (FT), and time series analysis. The results showed a significant cancellation in vibration magnitudes, particularly in the 10 Hz and 30-50 Hz frequency ranges, canceling the vibrations to 17.91% of their initial magnitude. The analytic morse wavelet(AMW), one of the CWT analysis further confirmed the system's ability to attenuate vibrations across various frequency ranges, demonstrating its potential as a solution for enhancing passenger comfort and reducing motion sickness in autonomous and future vehicles.

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