摘要
因窗函数的多样性及大部分窗函数的频谱公式过于复杂，利用窗函数频谱图形的校正方法在实际使用中有其局限性。本文通过对加窗信号的傅氏变换的分析，得出泄漏对信号的频域参量影响的定量表达式，推导出对信号的频域参量进行校正的一般性公式。在此基础上提出一种实用的窗函数频谱峰值搜寻算法。仿真结果表明窗谱图形峰值搜寻校正方法同样可达到窗谱公式校正方法的精度。
Because of the variety of window functios and the complicated spectrum formulas of most window function,the rectifying technique by using the wave pattern of the window spectrum is limited.In this paper,based on a windowing signal analysis with Fourier transform,the error caused by leakage is obtained and normal rectifying formulas of the windowing signal spectrum are deduced.On this basis,a practical crests searching algorithm of the window spectrums main band is put forward.Through an example,it is obviously known that the correction result by the crests searching algorithm is in good agreement with the correction result by the rectifying formulas of the windowing signal spectrum.
出处
《振动工程学报》
EI
CSCD
1996年第4期378-382,共5页
Journal of Vibration Engineering
关键词
频谱分析
窗谱
峰值搜寻
信息处理
spectrum analysis
error analysis
window spectrum
crests searching
