Document Detail

Accuracy of inertial motion sensors in static, quasistatic, and complex dynamic motion.
MedLine Citation:
PMID:  20353265     Owner:  NLM     Status:  MEDLINE    
Inertial motion sensors (IMSs) combine three sensors to produce a reportedly stable and accurate orientation estimate in three dimensions. Although accuracy has been reported within the range of 2 deg of error by manufacturers, the sensors are rarely tested in the challenging motion present in human motion. Their accuracy was tested in static, quasistatic, and dynamic situations against gold-standard Vicon camera data. It was found that static and quasistatic rms error was even less than manufacturers' technical specifications. Quasistatic rms error was minimal at 0.3 deg (+/-0.15 deg SD) on the roll axis, 0.29 deg (+/-0.20 deg SD) on the pitch axis, and 0.73 deg (+/-0.81 deg SD) on the yaw axis. The dynamic rms error was between 1.9 deg and 3.5 deg on the main axes of motion but it increased considerably on off-axis during planar pendulum motion. Complex arm motion in the forward reaching plane proved to be a greater challenge for the sensors to track but results are arguably better than previously reported studies considering the large range of motion used.
Alison Godwin; Michael Agnew; Joan Stevenson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biomechanical engineering     Volume:  131     ISSN:  1528-8951     ISO Abbreviation:  J Biomech Eng     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-07-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7909584     Medline TA:  J Biomech Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  114501     Citation Subset:  IM    
Laurentian University, Sudbury, Canada.
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MeSH Terms
Range of Motion, Articular / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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