一种非均匀同步采样及其DFT算法  

A non-uniformity synchronous sampling and DFT algorithm

作　　者：蔡菲娜[1] 张建奇[1] 

机构地区：[1]浙江工业大学之江学院,杭州310024

出　　处：《电测与仪表》2004年第6期11-13,共3页Electrical Measurement & Instrumentation

摘　　要：提出了一种非均匀同步采样方法,它不仅有效地抑止了采样周期误差,而且实际采样点与其理论采样点间的偏离也被有效控制在1个Td之内。所提出的DFT算法,具有精度高和计算量较小的特点,适用于周期信号电参数测量和谐波分析。Proposes a method of Two-section Double-speed synchronous sampling. It has effectively restrained error of the sampling period and made it not exceed one Td (Td are a resolution of the timer).The deviations between actual and theoretic sampling point are controlled within one Td .The Calculating amount of multiplication put forward is only half of DFT algorithms too.Calculation time is reduced and accuracy is improved obviously.It has practical applications value.It is suit for electric parameter measure and harmonic analysis of periodic signals.

关 键 词：周期信号 非均匀采样 DFT 同步采样 电参数测量 谐波分析 

分 类 号：TM93[电气工程—电力电子与电力传动]