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Article

Quantification of Active Structural Path for Vibration Reduction Control of Plate Structure under Sinusoidal Excitation

School of Mechanical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do 712-749, Korea
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Appl. Sci. 2019, 9(4), 711; https://doi.org/10.3390/app9040711
Received: 21 January 2019 / Revised: 12 February 2019 / Accepted: 13 February 2019 / Published: 18 February 2019
(This article belongs to the Special Issue Active and Passive Noise Control)
The engines of electric and hybrid vehicles cause vibration and noise with complex frequency spectra. This tendency is observed especially for mid-frequency components. Therefore, there are limitations in achieving vibration attenuation using only structural changes, which is the conventional isolation method. A smart structure-based active engine mounting system is a core technology that can continuously improve the noise, vibration, and harshness performance under various operating conditions by continuously controlling the dynamic characteristics of the mount. It can replace the existing mount technology which supports the engine by realizing both static and dynamic stiffness. This study focuses on vibration reduction for a typical mid-frequency excitation. Based on a source–path–receiver structure, a mathematical model for a 3D plate structure with three active paths is proposed. The amplitude and phase of the actuator were calculated for the reduction of given vibrations on the basis of the model. When controlling with the proposed method, it was necessary to perform a large amount of computation and to newly define the modeling according to the structural change. To solve this inconvenience, the NLMS (normalized least mean squares) algorithm was applied, and the results were compared. It is shown that the application of the NLMS algorithm to perform the overall vibration reduction is more effective than the previous method. View Full-Text
Keywords: plate structure; NVH; active path; engine mounting system; piezoelectric actuator; rubber mount plate structure; NVH; active path; engine mounting system; piezoelectric actuator; rubber mount
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MDPI and ACS Style

Hong, D.; Kim, B. Quantification of Active Structural Path for Vibration Reduction Control of Plate Structure under Sinusoidal Excitation. Appl. Sci. 2019, 9, 711. https://doi.org/10.3390/app9040711

AMA Style

Hong D, Kim B. Quantification of Active Structural Path for Vibration Reduction Control of Plate Structure under Sinusoidal Excitation. Applied Sciences. 2019; 9(4):711. https://doi.org/10.3390/app9040711

Chicago/Turabian Style

Hong, Dongwoo, and Byeongil Kim. 2019. "Quantification of Active Structural Path for Vibration Reduction Control of Plate Structure under Sinusoidal Excitation" Applied Sciences 9, no. 4: 711. https://doi.org/10.3390/app9040711

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