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RECONSTRUCTION STABILITY OF NEARFIELD ACOUSTIC HOLOGRAPHY 被引量:7

RECONSTRUCTION STABILITY OF NEARFIELD ACOUSTIC HOLOGRAPHY
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摘要 The distributed source boundary point method (DSBPM) is used as the spatial transform algorithm for realizing nearfield acoustic holography (NAH), the sensitivity of the reconstructed solution to the measurement errors is analyzed, and the regularization method is proposed to stabilize the reconstruction process, control the influence of the measurement errors and get a better approximate solution. An oscillating sphere is investigated as a numerical example, the influence of the measurement errors on the reconstruction solution is demonstrated, and the feasibility and validity of the regularization method are validated. Key words: Acoustic holography Boundary point method Inverse problem Regularization The distributed source boundary point method (DSBPM) is used as the spatial transform algorithm for realizing nearfield acoustic holography (NAH), the sensitivity of the reconstructed solution to the measurement errors is analyzed, and the regularization method is proposed to stabilize the reconstruction process, control the influence of the measurement errors and get a better approximate solution. An oscillating sphere is investigated as a numerical example, the influence of the measurement errors on the reconstruction solution is demonstrated, and the feasibility and validity of the regularization method are validated. Key words: Acoustic holography Boundary point method Inverse problem Regularization
出处 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2005年第4期504-509,共6页 中国机械工程学报(英文版)
基金 This project is supported by National Natural Science Foundation of China(No.50275044)Research Fund for Doctoral Program of Ministry of Education of China(No.20020359005).
关键词 Acoustic holography Boundary point method Inverse problem Regularization Acoustic holography Boundary point method Inverse problem Regularization
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