摘要
分析了小波包的频率分解特性及信号分解后的频率分布范围,并将小波包变换与功率谱分析相结合,利用小波包将信号分解到各个频段,通过比较电晕放电信号与噪声信号在各频段的功率谱的区别得出电晕放电信号的频率分布范围,并提取出放电信号的波形。
The frequency characteristic and range decomposed by wavelet packet was analyzed. Combine the wavelet packet and power spectrum analysis together, first, decompose the signals by wavelet packet, then make the spectrum of every frequency band, compare the spectrum of corona discharge signals and noise signals. From this, we get the frequency range of the corona discharge and extract the wave of corona discharge.
出处
《电气应用》
北大核心
2007年第2期59-61,共3页
Electrotechnical Application
基金
国家自然科学基金重点项目50237040
军械工程学院科研基金项目YJJXM0424资助。
关键词
电晕放电
小波包
频带
噪声
corona discharge wavelet packet frequency band noise
