A generalized approach for active control of structural-interior global noise

Hill, Simon G.; Tanaka, Nobuo; Snyder, Scott D.

doi:10.1016/j.jsv.2009.06.014

Cited by 14 publications

(12 citation statements)

References 32 publications

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“…15 reports the internal and the external SPL values as well as the SPL values of the residual noise calculated with Eq. (11). An improvement with respect to only the passive sound insulation can be observed, especially at low frequency below 250 Hz.…”

Section: Calibration Phasementioning

confidence: 81%

“…Starting by the preliminary study of Lyon [8], Pan and Bies [9] studied an active control system by using force actuators to reduce the noise transmitted through a panel into a cavity, while Snyder and Hansen [10] dealt with the problem of feedforward active systems by using the modal coupling theory. Hill et al [11] showed that the noise transmitted through the walls of a rectangular cavity can be described by a generalized acoustic function and the sound transmission control is independent on vibration characteristics of the radiating structure. A wider presentation of the issues concerning with the active noise control in cavities can be found in a previous study [12].…”

mentioning

confidence: 99%

“…The SPL of the residual error is evaluated by Eq (11). and is compared with SPL of the external noise transmitted inside box due only to the passive noise insulation.…”

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confidence: 99%

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Sound source measurement by using a passive sound insulation and a statistical approach

Dragonetti

Filippo

Mercogliano

et al. 2015

Journal of Sound and Vibration

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Section: Calibration Phasementioning

confidence: 81%

mentioning

confidence: 99%

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Sound source measurement by using a passive sound insulation and a statistical approach

Dragonetti

Filippo

Mercogliano

et al. 2015

Journal of Sound and Vibration

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“…Analiz için beyaz gövdenin sonlu elemanlar modelinin yanı sıra, kabin içindeki havanın da sonlu elemanlar modeline ihtiyaç vardır. Nihai benzetim için katı-akışkan etkileşimini de hesaba katan bağlaşık bir sayısal model gereklidir [9] [11]. Ancak, bu tip aktif yöntemler maliyetleri nedeniyle otomotiv sektöründe nadiren tercih edilirler.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Otomobillerde düşük frekanslı uğultu probleminin ayarlı kütle sönümleyicisi kullanımıyla iyileştirilmesi

Oktav

Yılmaz

Anlaş

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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 Diagnosis of low frequency booming problems  Experimental and computational modeling of body-in-white  Tuned mass damper design to improve acoustic comfort In this work, the aim is to improve the acoustic comfort of a vehicle by using both experimental and computational methods. To that end, tuned mass dampers are attached at optimum locations on the experimentally verified finite element model. Figure A. The techniques used in the proposed improvement method Purpose: Although it is a well-known solution, the use of tuned mass dampers is limited in the automotive sector. In the present study, the aim is to show that tuned mass dampers can be used to solve the low frequency booming problems. Theory and Methods: A finite element model of the vehicle is constructed, and structural and acoustical modes are computed. The structural modes of the vehicle are calculated experimentally, as well, and the computational model is updated using experimental results. The effective forces acting upon the structure are identified using transfer path analysis. The low frequency booming problems, which could not have been predicted at the design stage, are diagnosed by assessing the results of both experimental and computational analyses. Results: The L2 norms of the difference between the measured and computed sound pressure level curves are obtained as 3.8 dB and 4.4 dB for the front and the rear microphones, respectively. According to these results, it is concluded that the updated coupled vibro-acoustic model is successfully validated. Three low frequency booming rpm ranges are identified during the track tests, i.e., 3500-4200 rpm for the front microphone, 1600-2000 and 2950-4250 rpm ranges for the rear microphone. The booming problem in these ranges are successfully attenuated. The L2 norms of the achieved improvements are 11.2 dB, 7.8 dB and 3.3 dB in 3500-4200, 1600-2000 and 2950-4250 rpm ranges, respectively. Conclusion: The proposed modification study is successful in providing substantial improvements for the sound pressure levels in the targeted frequency ranges, where boomings are observed. Moreover, when the whole working frequency range is examined, it is seen that there is no deterioration with respect to the original situation.

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“…Minimization of potential energy can be achieved through minimization of the contribution from each cluster. Hill et al (2009) formulated acoustic based generalized orthogonal functions to represent the global acoustic potential energy inside a cavity, thus not requiring structural measurements for implementing the active control system.…”

Section: Introductionmentioning

confidence: 99%

Structural sensing of interior sound for active control of noise in structural-acoustic cavities

Bagha

Modak

2015

The Journal of the Acoustical Society of America

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This paper proposes a method for structural sensing of acoustic potential energy for active control of noise in a structural-acoustic cavity. The sensing strategy aims at global control and works with a fewer number of sensors. It is based on the established concept of radiation modes and hence does not add too many states to the order of the system. Acoustic potential energy is sensed using a combination of a Kalman filter and a frequency weighting filter with the structural response measurements as the inputs. The use of Kalman filter also makes the system robust against measurement noise. The formulation of the strategy is presented using finite element models of the system including that of sensors and actuators so that it can be easily applied to practical systems. The sensing strategy is numerically evaluated in the framework of Linear Quadratic Gaussian based feedback control of interior noise in a rectangular box cavity with a flexible plate with single and multiple pairs of piezoelectric sensor-actuator patches when broadband disturbances act on the plate. The performance is compared with an "acoustic filter" that models the complete transfer function from the structure to the acoustic domain. The sensing performance is also compared with a direct estimation strategy.

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A generalized approach for active control of structural-interior global noise

Cited by 14 publications

References 32 publications

Sound source measurement by using a passive sound insulation and a statistical approach

Sound source measurement by using a passive sound insulation and a statistical approach

Otomobillerde düşük frekanslı uğultu probleminin ayarlı kütle sönümleyicisi kullanımıyla iyileştirilmesi

Structural sensing of interior sound for active control of noise in structural-acoustic cavities

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