Active sound control with smart foams using piezoelectric sensoriactuator

Kundu, Amit; Berry, Alain

doi:10.1177/1045389x11409079

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…To overcome this, a relatively light smart foam study was conducted. The sound absorption performance of the smart foam made of polyvinylidene fluoride(PVDF) with a plexiglass cavity was tested, and the sound absorption coefficient was derived with or without control by placing the smart foam in the center, and evenly spaced microphones on both sides [ 27 ]. Another study compared smart-form-based control methods.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

Pyun

Park

Kim

et al. 2021

Sensors

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Techniques for reducing the reflection of acoustic signals have recently been actively studied. Most methods for reducing acoustic signals were studied using the normal-incidence wave reduction technique. Although the technique of canceling an object from the normal incidence wave is essential, research on reducing acoustic signals according to the angle of incidence is required for practical applications. In this study, we designed, fabricated, and experimented with an active reflection controller that can reduce acoustic signals according to the angle of incidence. The controller consists of a transmitter on one layer, a receiver sensor on two layers, and an acoustic window on three layers. To reduce the reflected signal, a combination of the time delay and phase was applied to the controller to minimize the acoustic signal by up to −23 dB at an angle of 10°. A controller array simulation was performed based on the results of a controlled experiment. In conclusion, our proposed controller can reduce acoustic signals according to the angle of incidence, which makes it suitable for many applications.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

Pyun

Park

Kim

et al. 2021

Sensors

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“…In another study (Sohn et al, 2011), the optimized location of the piezoelectric patches was determined. Kundu and Berry (2011) used piezoelectric sensoriactuator to active sound control with smart foams. Cao et al (2012) offered a technique on the piezoelectric actuators to prevent the sound radiation from a cylinder subjected to longitudinal excitation.…”

Section: Introductionmentioning

confidence: 99%

A robust optimum controller for suppressing radiated sound from an intelligent cylinder based on sliding mode method considering piezoelectric uncertainties

Talebitooti

Gohari

Zarastvand

et al. 2019

Journal of Intelligent Material Systems and Structures

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In this study, a robust controller against the uncertainties in piezoelectric patches including sensor and actuator is designed based on sliding mode method to control the radiated sound from cylindrical shells. Accordingly, in order to extract and discretize the dynamic equations of a smart cylinder equipped with piezoelectric patches, the Hamilton’s principle and the Rayleigh-Ritz method are, respectively, used . The radiated sound is estimated by the Kirchhoff-Helmholtz integral and the acoustic structural sensing method. Furthermore, an innovative approach is proposed on sliding mode control to model system uncertainties and design robust control signals against these disturbances. Using effective control signals for each mode is the applied methodology for establishing independent sliding surfaces. In fact, it is attempted to relate between actuator matrix determinant and system control ability in generating the efficient control signals and error reduction due to actuators uncertainties. By the aid of this relation, optimization of the actuators position according to the genetic algorithm is implemented. The obtained results show that by optimizing the actuators position not only the appropriate performance of the system in controlling the radiated sound from the structure is enhanced but also the essential control voltage for each actuator is significantly decreased.

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“…The adaptive feedback control system showed efficient noise reduction. To improve the transmission loss with small thickness, smart foams composed of PVDF film and half-cylinder-shaped melamine foam were investigated (Kundu and Berry, 2011). Significant improvement in noise reduction capability was obtained at specific frequencies.…”

Section: Introductionmentioning

confidence: 99%

Semi-active control of smart porous structure for sound absorption enhancement

Kim

Kwon

Jeong

et al. 2019

Journal of Intelligent Material Systems and Structures

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For sound absorption of conventional porous materials, its noise-reducing ability in low frequencies is less than that in high frequency bands. A porous layer offers effective sound absorption when the thickness of layer is a quarter wavelength of the sound wave. Increasing the layer thickness is not an effective solution. Adjustment of rear air cavity volume for the porous medium has been used in practical applications to increase low frequency sound absorption. Noise reduction using only passive sound absorption characteristics is a challenge, especially when the operation conditions of noise source changes. In this study, we propose a smart porous material having noise reduction ability in the broad frequency band. We implement semi-active control by applying a magnetic reactive material to a porous medium. The smart foam proposed in this study reduced noise with adjustment of the magnitude and polarity of the magnetic field. Evaluation of its noise reduction performance is performed with the impedance tube method. Experiments are conducted for semi-active noise control of the proposed smart foam. The sound absorption characteristics are controlled efficiently with relatively low electric power consumption. A theoretical model to predict absorption characteristics is proposed using the transfer-matrix method, and its results show good agreement with measured behaviors.

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Active sound control with smart foams using piezoelectric sensoriactuator

Cited by 12 publications

References 13 publications

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

Design and Analysis of an Active Reflection Controller That Can Reduce Acoustic Signal Refer to the Angle of Incidence

A robust optimum controller for suppressing radiated sound from an intelligent cylinder based on sliding mode method considering piezoelectric uncertainties

Semi-active control of smart porous structure for sound absorption enhancement

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