0
research-article

Application of inverse Patch Transfer Functions Method with Wideband Holography Algorithm to Sparsely Distributed Sources Identification

[+] Author and Article Information
Yansong He

School of Automotive Engineering, Chongqing University, 400044 Chongqing, China
hys68@cqu.edu.cn

Chong Liu

School of Automotive Engineering, Chongqing University, 400044 Chongqing, China
liuchong_cqu@cqu.edu.cn

Zhongming Xu

School of Automotive Engineering, Chongqing University, 400044 Chongqing, China
xuzm@cqu.edu.cn

Zhifei Zhang

School of Automotive Engineering, Chongqing University, 400044 Chongqing, China
z.zhang@cqu.edu.cn

Shu Li

School of Automotive Engineering, Chongqing University, 400044 Chongqing, China
leeshu@cqu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037471 History: Received November 22, 2016; Revised June 27, 2017

Abstract

Inverse Patch Transfer Functions (iPTF) method has been developed to reconstruct the sound field of irregularly shaped sources in a noisy environment. The iPTF method, which uses classic regularization methods to solve the ill-posed problems generally, would incur some sidelobes ghosting in the process of identifying sparse sources. In view of the fact that the algorithm in Wideband Holography (WBH) can promote sparsity of results, a technique combining iPTF method with WBH algorithm is proposed to identify sparsely distributed sources in the present work. In the proposed technique, double layer pressure measurements are used to replace the measurements of the pressure and normal velocity which uses costly p-u probes. A gradient descent algorithm and a filtering process are applied to solve the minimization problem of identifying the normal velocities of target sources, which can suppress ghosting sources rapidly by an iterative process. In simulations, the field reconstruction results of two anti-phase square piston sources show good sparsity and accuracy by employing the technique, nearly without ghosting sources. At different distances and frequencies of the two sources, the technique still performs well. Experimental validations at 200Hz and 400Hz are carried out in the end. The present results in experiments are also coincident with those in simulations.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In