Cyclostationary Near-field Acoustic Holography for Gearboxes
Zhu Song
Zhang Erliang
Gao Xiaoyu
Abstract：Regarding the problem that the traditional near-field acoustic holography(NAH)has difficulty in reconstructing the sound field of the gearbox,this work makes full use of the cyclostationary characteristics of the radiated noise and combines the cyclostationary signal analysis with the equivalent source NAH algorithm to develop a sound imaging method for the gearbox.Firstly,the set of cyclic frequencies was estimated from the noise signal;secondly,the cyclic frequency of interest was selected,and the corresponding cyclic spectral densi-ty function was calculated;thirdly,the equivalent source NAH method was developed to reconstruct the poten-tial sound source of the gearbox.Finally,the effectiveness of the sound imaging method was justified by the sim-ulation and experimental data.
Keywords：GearboxCyclostationaryNear-field acoustic holographyEquivalent source method
Publication Date：2024-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 29-34 )