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Author Xiaoxu Wu ♦ Yan Wang ♦ Pottie, G.
Sponsorship IEEE Eng. Med. Biol. Soc.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health ♦ Engineering & allied operations
Subject Keyword Sensors ♦ Legged locomotion ♦ Equations ♦ Mathematical model ♦ Estimation ♦ Trajectory ♦ Acceleration
Abstract Monitoring lower body motion, especially gait pattern, using low cost Inertial Measurement Units on a daily basis is becoming critically important for the diagnosis and rehabilitation of neurological diseases. The current state of the art algorithm is to double integrate motion acceleration and compensate cumulative errors by resetting velocity signals to zero at the stance-phase of each stride. However, this method is only applicable for foot-mounted sensors. For the medically more preferable ankle-mounted position, the assumption of this zero-velocity-update (ZUPT) method does not hold. In this paper, a new non-ZUPT method is proposed. We estimated the true velocity during stance-phase, and reset velocity to the estimated value instead of zero. 10 subjects were recruited for 40-meter-level flat floor walking. The stride length estimation error was reduced to 3.58% from 13.22% on average comparing to the conventional ZUPT method on an ankle-mounted sensor. Validity of this method is further supported by stairs walking of 4 more subjects.
Description Author affiliation: Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA (Xiaoxu Wu; Yan Wang) || Fac. of the Dept. of Electr. Eng., Univ. of California, Los Angeles, Los Angeles, CA, USA (Pottie, G.)
ISBN 9781424479290
ISSN 1557170X
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-08-26
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 2.36 MB
Page Count 4
Starting Page 5884
Ending Page 5887

Source: IEEE Xplore Digital Library