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Wednesday, July 10 • 11:30 - 11:50
APPLICATION OF BAYESIAN REGULARIZATION CRITERION IN NEAR FIELD ACOUSTIC HOLOGRAPHY BASED ON INVERSE BOUNDARY ELEMENT METHOD

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Sound field reconstruction based on inverse boundary element method (IBEM) is an ill-posed inverse problem. For inverse problems, the results are always sensitive to the error of measurement. Therefore, it is necessary to use regularization to obtain the optimal solution. In this study, the Tikhonov method is used for regularization, and the Bayesian regularization criterion is introduced to select the optimal regularization parameter, then compared with General-Cross Validation (GCV) and L-curve methods through the simulation analysis.The results show that the Bayesian regularization criterion has an excellent reconstruction performance. Further calculations show that Bayesian method can reconstruct the sound field stably and accurately.

Moderators
avatar for Simon Jones

Simon Jones

Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
GM

Guilhem Michon

Professor, ISAE-SUPAERO

Authors

Wednesday July 10, 2019 11:30 - 11:50 EDT
St-Laurent 7
  T07 Struct. dyn. & nonlin. vib., RS03 Struct ac & vibr