摘要
在推导电流信号加窗快速傅里叶变换表达式基础上,对比分析了电流信号加各种窗函数对频谱性能的影响,讨论了不同采样点数和采样频率对电流频谱特性的影响。仿真结果表明,电流信号加矩形窗和采样点数为1024时,具有最小的直流幅值误差、正弦幅值误差和频率误差。
In this paper,on the basis of deducing the current signal expression of windowed fast Fourier transform,the influence of current signal adding various window functions on spectrum performance was researched.The effect of different sampling points and sampling frequency on the current spectral characteristics was discussed.The simulation results show that the smallest DC amplitude error,sinusoidal amplitude error and frequency error were obtained when current signal was added with rectangular window and the sampling number was 1024.
作者
谢志平
郭子义
郎彦城
王蕾
XIE Zhiping;GUO Ziyi;LANG Yancheng;WANG Lei(School of Mechanical&Electrical Engineering,Guizhou Normal University,Guiyang,Guizhou 550001,China;School of Big Data and Computer Science,Guizhou Normal University,Guiyang,Guizhou 550001,China;School of Economics and Management,Guizhou Normal University,Guiyang,Guizhou 550025,China)
出处
《贵州师范大学学报（自然科学版）》
CAS
2020年第6期86-89,共4页
Journal of Guizhou Normal University：Natural Sciences
基金
中央引导地方科技科技发展专项资金(黔科中引地[2016]4006号)
贵州省重大科技专项计划(黔科合重大专项字[2019]3003)
贵州省科学技术联合基金(黔科合J字LKS[2012]46号)
贵州省科技计划基础研究项目(黔科合基础[2019]1233号)
贵州师范大学博士基金。
关键词
信号处理
快速傅里叶变换
窗函数
频谱分析
signal processing
fast Fourier transform
window function
spectral analysis
