A general solution for the time delay introduced by a low-pass Butterworth digital filter: An application to musculoskeletal modeling

被引：30
|
作者：
Manal, Kurt [1 ]
Rose, William
机构：
[1] Univ Delaware, Ctr Biomed Engn Res, Spencer Lab 126, Newark, DE 19716 USA
[2] Univ Delaware, Coll Hlth Sci, Newark, DE 19716 USA
来源：
JOURNAL OF BIOMECHANICS | 2007年 / 40卷 / 03期
关键词：
signal; processing; smoothing; electromechanical delay; group delay;
D O I：
10.1016/j.jbiomech.2006.02.001
中图分类号：
Q6 [生物物理学];
学科分类号：
071011 ;
摘要：
Low-pass Butterworth digital filters are commonly used in biomechanics-related research. In general, the input signal is filtered in the forward and reverse directions so that a temporal shift in the output signal does not occur. There are times, however, when introducing a specific time delay is an important consideration when modeling a physiological event. Filtering the data in the forward direction only can be used as an efficient method to account for a specific time delay. Specific delays are possible by carefully selecting the filter order and cut-off frequency. The purpose of this paper is to present the analytical formulation of a general solution for the time delay introduced by a low-pass Butterworth digital filter. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：678 / 681
页数：4
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