期刊
JOURNAL OF BIOMECHANICS
卷 40, 期 3, 页码 678-681出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2006.02.001
关键词
signal; processing; smoothing; electromechanical delay; group delay
资金
- NATIONAL CENTER FOR RESEARCH RESOURCES [P20RR016458] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES [R01AR048212] Funding Source: NIH RePORTER
- NCRR NIH HHS [RR16458] Funding Source: Medline
- NIAMS NIH HHS [R-01 AR48212] Funding Source: Medline
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.
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