小波分析在固体发动机试验中振动信号去噪研究  

Noise-reducing of vibration signal in SRM ground test by using wavelet analysis

作　　者：李建锋[1] 施广富[1] 张平[1] 

机构地区：[1]中国航天科技集团公司四院四〇一所,西安710025

出　　处：《固体火箭技术》2002年第4期63-66,共4页Journal of Solid Rocket Technology

摘　　要：在固体火箭发动机地面试验中,由于燃气喷流噪声的作用,使得测量得到的发动机壳体振动信号中包含有很强的噪声分量。通过对噪声信号与振动信号相关性的分析,确定了噪声对振动信号作用最强的频段,并结合小波分析,小波包分析理论,应用频带分离方法对振动信号进行去噪处理,取得良好效果。During solid rocket motor ground tests, because of action of jet noise, there are strong noise component in measured vibration signal. The correlativity between noise signal and vibration signal is analyzed in this paper. The strong frequency bands in which noise signal affects vibration signal are determined. Combination with wavelet analysis and wavelet-packet analysis, the noise signal is extracted from vibration signal by using method of separating frequency band, and satisfied result is given.

关 键 词：小波分析 去噪 固体推进剂火箭发动机 地面试验 振动信号 信号处理 

分 类 号：V433.9[航空宇航科学与技术—航空宇航推进理论与工程]