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Smart Structures and Systems Volume 32, Number 6, December 2023 , pages 393-402 DOI: https://doi.org/10.12989/sss.2024.32.6.393 |
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Multi-spectral adaptive vibration suppression of two-path active mounting systems with multi-NLMS algorithms |
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Yang Qiu, Dongwoo Hong and Byeongil Kim
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| Abstract | ||
| Recently, hybrid and electric vehicles have been actively developed to replace internal combustion engine (ICE) vehicles. However, their vibrations and noise with complex spectra cause discomfort to drivers. To reduce the vibrations transmitted through primary excitation sources such as powertrains, structural changes have been introduced. However, the interference among different parts is a limitation. Thus, active mounting systems based on smart materials have been actively investigated to overcome these limitations. This study focuses on diminishing the source movement when a structure with two active mounting systems is excited to a single sinusoidal and a multi-frequency signal, which were investigated for source movement reduction. The overall structure was modeled based on the lumped parameter method. Active vibration control was implemented based on the modeled structure, and a multi-normalization least mean square (NLMS) algorithm was used to obtain the control input for the active mounting system. Furthermore, the performance of the NLMS algorithm was compared with that of the quantification method to demonstrate the performance of active vibration control. The results demonstrate that the vibration attenuation performance of the source component was improved. | ||
| Key Words | ||
| active engine mounting; beam structure; mathematical quantification method; multi-NLMS algorithm; piezoelectric actuator | ||
| Address | ||
| (1) Yang Qiu, Byeongil Kim: School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, South Korea; (2) Dongwoo Hong: Daegu Mechatronics & Materials Institute, Daegu 42714, South Korea. | ||