Active control of turbulent boundary layer sound transmission into a vehicle interior

Caiazzo, Anna; Alujević, Neven; Pluymers, Bert; Desmet, Wim

doi:10.1088/1742-6596/744/1/012026

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…Each is modelled as a singledegree-of-freedom (SDOF) oscillator. Each of the two oscillators approximates a potentially more complicated distributed parameter structure through its fundamental vibration mode, like, for example, in references [11,12] When represented as amplitudes of the two corresponding transfer mobility functions, it becomes clear that the reciprocity loss increases with frequency [6,10]. Therefore, at low frequencies, the amplitudes are identical, as if the feedback loop is not active.…”

Section: Negative Position Feedbackmentioning

confidence: 99%

Nonreciprocal vibration transmission using dislocated position feedback

Arandia-Kreić,

Alujević,

Krivačić

et al. 2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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This paper examines absolute position feedback using dislocated sensor-actuator pairs to design and implement an active metamaterial cell for nonreciprocal vibration transmission. It has been shown previously that by using dislocated sensor-actuator pairs to implement absolute velocity feedback, a stable and robust nonreciprocal vibration transmission can be achieved. In contrast to other active approaches, which typically induce narrowband non-reciprocity, the dislocated transducer pair methodology induces a broadband non-reciprocity. However, the passive cell before control must be carefully designed to mitigate instability due to the lack of collocation between sensor-actuator pairs. Furthermore, with absolute velocity feedback, the reciprocity loss decreased as the frequency decreased. Therefore, the achievable nonreciprocity was relatively weak at low frequencies where the error velocity signals were fairly small. It is therefore of interest to consider pure absolute position feedback, where strong quasi-static and low-frequency error signals could potentially induce a large nonreciprocity also at low frequencies. Therefore, in this study comprehensive stability and performance analyses of the absolute position feedback using dislocated sensor-actuator pairs are carried out both theoretically and experimentally. The difference in the vibration transmissibility in the two opposite directions obtained experimentally amounts to quite spectacular 30 dB in the frequency range between 30-1000Hz.

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Section: Negative Position Feedbackmentioning

confidence: 99%

Nonreciprocal vibration transmission using dislocated position feedback

Arandia-Kreić,

Alujević,

Krivačić

et al. 2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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“…reported on the active control of the turbulent boundary layer sound transmission into a vehicle’s interior. 8 Zhoul and Wenlei reported on the study of the vibration and noise transmissibility characteristics of a gear transmission system. 9…”

Section: Introductionmentioning

confidence: 99%

“…7 Caiazzo et al reported on the active control of the turbulent boundary layer sound transmission into a vehicle's interior. 8 Zhoul and Wenlei reported on the study of the vibration and noise transmissibility characteristics of a gear transmission system. 9 The inerter is a recently proposed concept and device that allows an applied force at two terminals to be proportional to the relative acceleration between them.…”

Section: Introductionmentioning

confidence: 99%

The transmissibility of a vibration isolation system with ball-screw inerter based on complex mass

Wen

Guo

et al. 2018

Journal of Low Frequency Noise, Vibration and Active Control

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The wide application of the ball-screw inerter for vibration isolation has made it increasingly important to precisely determine the vibration transmissibility of the isolation system. In this reported work, the transmissibility of a vibration isolation system containing an inerter was predicted by using a complex mass M* in the calculations. The reported theoretical analysis showed that in the design of the type II inerter-spring-damper and inerter-rubber vibration isolation systems, the inertance-mass ratio must be less than twice the damping ratio to achieve improved vibration isolation performance when designing the system. To validate the findings, experimental tests were conducted on the type II inerter-spring-damper and inerter-rubber vibration isolation systems with ball-screw inerter. The experimental results showed that, based on M*, the transmissibility of these two systems was close to the experimental results, which illustrated the rationale for using M*. The results of this reported study will help facilitate the parameter design and performance analysis of a vibration isolation system with an inerter.

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