摘要
为了从柴油机缸盖振动信号中获取缸内燃烧响应信号,提出了基于连续小波时间—能量分布提取柴油机燃烧响应信号的方法:选择Morlet小波对原信号做连续小波变换,在尺度上积分求出信号的时间—能量分布;然后,根据柴油机的工作相位截取燃烧响应信号。用该方法对实测缸盖振动信号进行分析,结果表明:该方法可以比较准确地提取柴油机缸内燃烧响应信号,为进一步依据燃烧响应信号分析柴油机的工作状况提供了条件。
In order to obtain the combustion signal from diesel cylinder head vibration, this paper presents a method of extracting diesel combustion signal based on time-wavelet energy distribution. Firstly, do continuous wavelet transformation applying morlet wavelet and obtain the time-wavelet energy distribution of signal ; then intercept combustion response signal according to the diesel＇ s working principles. Using this method, vibration signals of the cylinder head were analyzed. The result showed that this method could accurately extract signals of diesel combustion from the diesel cylinder head vibration signals. This provided conditions for further analyzing the working state of diesel based on combustion signals.
出处
《农机化研究》
北大核心
2013年第7期233-236,共4页
Journal of Agricultural Mechanization Research
基金
"十二五"国家科技支撑计划项目(2011BAD20B10-3)
关键词
信号提取
柴油机
小波变换
signal extraction
diesel
wavelet transform
