摘要
研究了ＩＤＦ的频率特性，并与数值微分频率特性、典型微分环节的频率特性进行了比较，然后对其进行了误差分析．通过这一研究，找出了通频带与离散步长Δｔ 的近似关系，得出误差与离散步长Δｔ 成正比的结论。
IDF(Inverse Digital Filter)was proposed recently to solve the problem in control.In this paper,we study the frequency characteristics of IDF,and then compare it with that of numerical differentiation and typical differentiator.Error analysis is also performed.As a result,we find the approximate relation between discrete step Δ t and passband,and get the conclusion that the error of IDF is proportional to Δ t.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
1999年第5期647-650,共4页
Control Theory & Applications
基金
国家教委留学回国人员科研启动资金
国家博士后科学资助基金!( 中博基[1998]6 号)
关键词
反数字滤波器
数值微分
频率特性
控制系统
inverse digital filter
numerical differentiation
frequency characteristic
