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 Wysłany: Nie 3:43, 08 Maj 2011 Temat postu: christian louboutin sko Surface pressures on the s |
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Surface pressures on the structure of the adaptive active control of sound absorption
eacousticreflectioncoefficientatlowfrequencies. In: ProceedingsofInter-Noise83, 19834l9-4222HowarthTR,christian louboutin sko, BaoXQ,abercrombie milano, VaradanVK, eta1. Piezocompositecoatforactiveunderwatersoundreduc-tion. J. ACOUSt. Soc. Am. 1992; 91:823-83l3LafleurLD, ShieldsFD, HendixJE. Acousticallyactivesurfacesusingpiezorubber. J. Acoust. Soc. Am. , L99l; 90 (3): l230-12374 peptone Amor , active absorption layer theory. Northwestern Polytechnical University , 1999; 17 (2); lsl-l865JohnsonME,Oakley Briller, ElliottSJ. Activecontrolofsoundradiationusingvolumevelocitycancellation. J. A-coust. Soc. Am. 1995; 98:2 l74-21856 Ke-An Chen . Active sound absorption unit calculation and mechanism of absorption . Vibration Engineering , 1998; 11 (4) :402 -4097 peptone Amor , Ma Yuanliang . Adaptive active noise control algorithm and implementation of a principle + . Xi'an : Northwest Industry University Press , 1993AdaptiveActiveControlofSoundAbsorptionBasedontheSoundPressureontheActiveStructureSurfacechenKcan (CollegeofMarineEngineering,oakley norge, NorthwesternPolytechnicalUniversityXi. an,jordan shoes, 7] 0072) YinXuefei (Dept.ofElectronicEngineering, NorthwesternPolytechnica] UniversityXian.710072) AbstractAnadaptivecontrolapproachappliedtopracticalactivesoundabsorptionsystemsispresented. Firstly, threekindsofcontrolstrategiesi. e, minimizationofthetotalreflectedsoundpower, minimizationofthesquaredsoundpressuressurface, minimizationofsquaredsoundpressureatdiscretelocationsontheactivestructuresurfacearegiven. Thenbasedonthenear-fieldapproach. acoustoeiastictheoryanduncon-strainedoptimizationtechniquetformulaeofcalculatingsoundabsorptionareanalyticallyderived. Finally. underthreecriteriaeffectsofnumberandlocationofsecondaryforcesourcesandmonitoringsensol ~ onsoundabsorptionareinvestigatedKeywords: noisecontrol; soundabs. rptj0
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