摘要
基于传统信号处理对非平稳信号的局限,分析了子波变换下奇异信号和白噪声在多尺度空间中模极大值传播特性,对仿真声发射信号进行处理,结果表明该方法能有效地从声发射信号中提取声源位置信息,并提出了一种有效提取该信息的算法,说明了该方法在复合材料结构损伤主动监测中的应用前景。
Based on the limitation of classical signal processing methods in case of nonstationality, the modules maximum evolution behavior of singular and random noise in multiscale space was analyzed using the WT. A simulation AE signal was processed. And an effective algorithm was presented to obtain the useful signal about the place information from the simulation signal. It shows the nice future of the application in the active damage detection of composite material.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1998年第4期59-63,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金
航空科学基金
机械结构强度与振动国家重点实验室基金
关键词
子波变换
复合材料
损伤监测
声发射
wavelet transformation, composite material, damage detection, acoustic emission