Novel rubber-electromagnetic composite active/passive vibration isolator

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 32-37.

REN Mingke1,2, XIE Xiling1,2, HUANG Zhiwei3, ZHANG Zhiyi1,2

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Abstract

The broadband and low-frequency tonal vibration generated by power equipment has an important impact on the cabin noise and underwater acoustic radiation of vessels. A passive/active vibration isolator is proposed to support heavy marine power equipment and attenuate vibration transmission. Since it is difficult for the conventional Fx-LMS algorithm to attenuate multiple harmonics of different amplitudes equally in practice, a frequency domain weighting technique is introduced to the adaptive algorithm to improve the frequency response characteristics of the control channel and increase the proportion of weakly controllable harmonic components in error signals. The static bearing capacity of the rubber isolator, the driving force of the actuator and the performance of the passive/active vibration isolation are investigated. The results show that the rubber isolator is of linear stiffness and able to bear 15-ton payload, and the estimated force constant of the actuator is 72N/A. Utilizing the frequency domain weighted Fx-LMS algorithm, the harmonics within 300Hz are greatly suppressed, which demonstrates the effectiveness of the passive/active vibration isolator and the improved adaptive algorithm.

Key words

power equipment / vibration isolation / passive/active vibration isolator / low frequency tonal vibration / adaptive algorithm

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REN Mingke1,2, XIE Xiling1,2, HUANG Zhiwei3, ZHANG Zhiyi1,2. Novel rubber-electromagnetic composite active/passive vibration isolator[J]. Journal of Vibration and Shock, 2021, 40(23): 32-37

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