Noise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurements

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dc.contributor.authorMokrý, Pavel
dc.contributor.authorPsota, Pavel
dc.contributor.authorSteiger, Kateřina
dc.contributor.authorVáclavík, Jan
dc.contributor.authorDoleček, Roman
dc.contributor.authorLédl, Vít
dc.contributor.authorŠulc, Miroslav
dc.date.accessioned2016-05-24
dc.date.available2016-05-24
dc.date.issued2015
dc.description.abstractThe paper presents methods and experimental results of the semi-active control of noise transmission in a curved glass shell with attached piezoelectric macro fiber composite (MFC) actuators. The semi-active noise control is achieved via active elasticity control of piezoelectric actuators by connecting them to an active electric shunt circuit that has a negative effective capacitance. Using this approach, it is possible to suppress the vibration of the glass shell in the normal direction with respect to its surface and to increase the acoustic transmission loss of the piezoelectric MFC-glass composite structure. The effect of the MFC actuators connected to the negative capacitance shunt circuit on the surface distribution of the normal vibration amplitude is studied using frequency-shifted digital holography (FSDH). The principle of the used FSDH method is described in the paper. The frequency dependence of the acoustic transmission loss through the piezoelectric MFC-glass composite structure is estimated using measurements of the specific acoustic impedance of the curved glass shell. The specific acoustic impedance is measured using two microphones and a laser Doppler vibrometer (LDV). The results from the LDV measurements are compared with the FSDH data. The results of the experiments show that using this approach, the acoustic transmission loss in a glass shell can be increased by 36 dB in the frequency range around 247 Hz and by 25 dB in the frequency range around 258 Hz. The experiments indicate that FSDH measurements provide an efficient tool that can be used for fast and accurate measurements of the acoustic transmission loss in large planar structures. (C) 2015 Author(s).en
dc.description.sponsorshipCzech Science Foundation [GACR 13-10365S]; Ministry of Education, Youth and Sports of the Czech Republic [NPU LO1206]; Ministry of Education of the Czech Republic within the SGS at the Technical University of Liberec [78001/115]
dc.formattext
dc.identifier.doi10.1063/1.4913624
dc.identifier.issn2158-3226
dc.identifier.scopus2-s2.0-84923371751
dc.identifier.urihttps://dspace.tul.cz/handle/15240/16377
dc.identifier.urihttps://aip.scitation.org/doi/10.1063/1.4913624
dc.language.isoen
dc.publisherAmer Inst Physics
dc.publisherTechnická Univerzita v Libercics
dc.publisherTechnical university of Liberec, Czech Republicen
dc.relation.ispartofAip Advancesen
dc.sourcej-scopus
dc.sourcej-wok
dc.titleNoise suppression in curved glass shells using macro-fiber-composite actuators studied by the means of digital holography and acoustic measurementsen
dc.typeArticle
local.accessοpen
local.departmentInstitute of Mechatronics and Computer Engineering
local.facultyFaculty of Mechatronics, Informatics and Interdisciplinary Studies
local.fulltextyes
local.identifier.publikace1385
local.identifier.wok350545500032
local.relation.issue2
local.relation.volume5
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