Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures

Seppo Uosukainen; Ari Saarinen; Kiran Sahu; Hannu Nykänen; Antti Kelloniemi

Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures

Seppo Uosukainen, Ari Saarinen, Kiran Sahu, Hannu Nykänen, Antti Kelloniemi

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

The Elastic Mass Actuator (EMA) is a dynamic mass absorber controlled by active means. Simulations have proved that the harmonic distortion, being very low, is not a relevant parameter with EMA, due to its symmetric construction. With the optimized parameter values 1 m amplitude can be achieved with a signal voltage of 20 V. This is enough e.g. for façade elements in buildings, but applications where higher amplitudes are needed will require rather large alterations in the construction. The properties of EMA have been studied also experimentally by measuring the displacement and phase distributions of the actuator, and by using EMA to actively reduce the vibration of a sandwich plate construction. The reduction ratios of EMA (ratio of displacements control on to control off) have varied from 0.54 to 0.65 (mean 0.6) at single frequency excitations and around 0.65 at narrow band excitations. The first EMA element is not able to reduce sound pressure levels due to its non-even phase and displacement distributions.

Original language	English
Title of host publication	Proceedings of the International Conference on Noise and Vibration Engineering, ISMA2008
Editors	Paul Sas
Place of Publication	Leuven
Pages	381-395
Publication status	Published - 2008
MoE publication type	A4 Article in a conference publication
Event	International Conference on Noise and Vibration Engineering, ISMA 2008 - Leuven, Belgium Duration: 15 Sept 2008 → 17 Sept 2008

Conference

Conference	International Conference on Noise and Vibration Engineering, ISMA 2008
Abbreviated title	ISM2008
Country/Territory	Belgium
City	Leuven
Period	15/09/08 → 17/09/08

Keywords

active noise control
sound transmission loss
dynamic mass absorber
simulations
measurements

Cite this

@inproceedings{5e680e7f88ce42f4908a6842e8a8bbb0,

title = "Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures",

abstract = "The Elastic Mass Actuator (EMA) is a dynamic mass absorber controlled by active means. Simulations have proved that the harmonic distortion, being very low, is not a relevant parameter with EMA, due to its symmetric construction. With the optimized parameter values 1 m amplitude can be achieved with a signal voltage of 20 V. This is enough e.g. for fa{\c c}ade elements in buildings, but applications where higher amplitudes are needed will require rather large alterations in the construction. The properties of EMA have been studied also experimentally by measuring the displacement and phase distributions of the actuator, and by using EMA to actively reduce the vibration of a sandwich plate construction. The reduction ratios of EMA (ratio of displacements control on to control off) have varied from 0.54 to 0.65 (mean 0.6) at single frequency excitations and around 0.65 at narrow band excitations. The first EMA element is not able to reduce sound pressure levels due to its non-even phase and displacement distributions.",

keywords = "active noise control, sound transmission loss, dynamic mass absorber, simulations, measurements",

author = "Seppo Uosukainen and Ari Saarinen and Kiran Sahu and Hannu Nyk{\"a}nen and Antti Kelloniemi",

year = "2008",

language = "English",

isbn = "978-907-380-2865",

pages = "381--395",

editor = "Paul Sas",

booktitle = "Proceedings of the International Conference on Noise and Vibration Engineering, ISMA2008",

note = "International Conference on Noise and Vibration Engineering, ISMA 2008, ISM2008 ; Conference date: 15-09-2008 Through 17-09-2008",

}

Uosukainen, S, Saarinen, A, Sahu, K, Nykänen, H & Kelloniemi, A 2008, Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures. in P Sas (ed.), Proceedings of the International Conference on Noise and Vibration Engineering, ISMA2008. Leuven, pp. 381-395, International Conference on Noise and Vibration Engineering, ISMA 2008, Leuven, Belgium, 15/09/08.

Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures. / Uosukainen, Seppo; Saarinen, Ari; Sahu, Kiran et al.
Proceedings of the International Conference on Noise and Vibration Engineering, ISMA2008. ed. / Paul Sas. Leuven, 2008. p. 381-395.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures

AU - Uosukainen, Seppo

AU - Saarinen, Ari

AU - Sahu, Kiran

AU - Nykänen, Hannu

AU - Kelloniemi, Antti

PY - 2008

Y1 - 2008

N2 - The Elastic Mass Actuator (EMA) is a dynamic mass absorber controlled by active means. Simulations have proved that the harmonic distortion, being very low, is not a relevant parameter with EMA, due to its symmetric construction. With the optimized parameter values 1 m amplitude can be achieved with a signal voltage of 20 V. This is enough e.g. for façade elements in buildings, but applications where higher amplitudes are needed will require rather large alterations in the construction. The properties of EMA have been studied also experimentally by measuring the displacement and phase distributions of the actuator, and by using EMA to actively reduce the vibration of a sandwich plate construction. The reduction ratios of EMA (ratio of displacements control on to control off) have varied from 0.54 to 0.65 (mean 0.6) at single frequency excitations and around 0.65 at narrow band excitations. The first EMA element is not able to reduce sound pressure levels due to its non-even phase and displacement distributions.

AB - The Elastic Mass Actuator (EMA) is a dynamic mass absorber controlled by active means. Simulations have proved that the harmonic distortion, being very low, is not a relevant parameter with EMA, due to its symmetric construction. With the optimized parameter values 1 m amplitude can be achieved with a signal voltage of 20 V. This is enough e.g. for façade elements in buildings, but applications where higher amplitudes are needed will require rather large alterations in the construction. The properties of EMA have been studied also experimentally by measuring the displacement and phase distributions of the actuator, and by using EMA to actively reduce the vibration of a sandwich plate construction. The reduction ratios of EMA (ratio of displacements control on to control off) have varied from 0.54 to 0.65 (mean 0.6) at single frequency excitations and around 0.65 at narrow band excitations. The first EMA element is not able to reduce sound pressure levels due to its non-even phase and displacement distributions.

KW - active noise control

KW - sound transmission loss

KW - dynamic mass absorber

KW - simulations

KW - measurements

M3 - Conference article in proceedings

SN - 978-907-380-2865

SP - 381

EP - 395

BT - Proceedings of the International Conference on Noise and Vibration Engineering, ISMA2008

A2 - Sas, Paul

CY - Leuven

T2 - International Conference on Noise and Vibration Engineering, ISMA 2008

Y2 - 15 September 2008 through 17 September 2008

ER -

Elastic Mass Actuator (EMA) concept for Sound Transmission Loss increase of panel like structures

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Cite this