Internal Noise Source Location of Manned Spacecraft Capsule Based on Spherical Microphone Array

Paper number

IAC-18,D2,9-D6.2,7,x44480

Author

Ms. Dandan Ding, China

Coauthor

Prof. Xiang Lv, China

Coauthor

Mr. Xiaoqiang Li, China

Coauthor

Mr. Wei Tong, China

Year

2018

Abstract

\begin{}
Manned spacecraft capsule is the work and life place for astronauts, and it must provide astronaut with healthy environment. If the noise in the closed capsule is too large, it will make the astronauts' health in danger. Therefore, it is very important for us to control the capsule noise source effectively, and the control of the noise source is based on the accurate location and identification of noise source in the closed capsule.

In the field of noise source localization, the noise source localization method of the base microphone array is generally used. The most commonly used techniques for noise source location are near-field acoustic holography(NAH) and beamforming. In this paper, a 64-element spherical microphone array is used to pick up the steady-state noise source signals in a closed spacecraft cabin. Near-field spherical acoustic holography and spherical harmonic functional beamforming are combined to locate and identify noise sources in a closed cabin.

The research result shows that the spherical array with uniformly and randomly distributed spherical arrays has the full-space target localization characteristics. The spherical near-field acoustic holography has higher localization accuracy for the low-frequency short-distance acoustic source in the closed space, and focused beamforming based on spherical harmonics expansion high positioning accuracy for the High-frequency long-distance sound source in the closed space. The two methods are combined to achieve the sound source location and identification can broaden location and identification frequency range for the noise source and make better location performance.
\end{abstract}

Abstract document

IAC-18,D2,9-D6.2,7,x44480.brief.pdf

Manuscript document

IAC-18,D2,9-D6.2,7,x44480.pdf (🔒 authorized access only).

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