| 小波包分析对舱音背景声中微弱信号的检测 |
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| 引用本文： | 郭超.小波包分析对舱音背景声中微弱信号的检测[J].民用飞机设计与研究,2010(4):12-15. |
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| 作者姓名： | 郭超 |
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| 作者单位： | 上海飞机设计研究院适航工程中心,上海,200235 |
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| 摘 要： | 针对民航事故调查中的舱音背景声分析,利用小波包分析方法,对不同种类开关手柄声进行了分析,提出了开关手柄声具有暂态噪声脉冲特征的结论。最后,以波音737客机实验样本和真实CVR样本为研究对象进行分析,利用暂态噪声脉冲特征,成功地对淹没在环境声中的起落架手柄声予以检测和定位。为民航事故调查中驾驶舱话音记录器CVR(Cockpit Voice Recorder)中开关手柄声信号的检测和定位提供了一种有效且方便的方法。
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| 关 键 词： | 民用飞机 事故调查 暂态噪声脉冲 小波包分析 |
Wavelet Packet Analysis in the Detection of Weak Signals in the Civil Craft Cockpit Background Sound |
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| GUO Chao.Wavelet Packet Analysis in the Detection of Weak Signals in the Civil Craft Cockpit Background Sound[J].Civil Aircraft Design and Research,2010(4):12-15. |
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| Authors: | GUO Chao |
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| Institution: | Guo Chao(Airworthiness Engineering Center,Shanghai Aircraft Design and Research Institute,Shanghai 200235) |
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| Abstract: | For the aircraft cockpit background sound analysis in civil aviation accident investigation,the wavelet packet analysis method is used to analyze different kinds of switches sounds,and summarize the conclusion that the switches sounds have transient noise impulse characteristics. Finally,the experimental samples and the real CVR samples of switches sounds for the B737 aircraft are analyzed,and using transient noise impulse characteristics,succeed to detect and locate the landing gear sound which is submerge... |
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| Keywords: | Civil Aircraft Accident Investigation Transient Noise Impulse |
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