A novel method of using accelerometry for upper limb FES control

Sun, M ORCID: https://orcid.org/0000-0003-1514-1490, Kenney, L ORCID: https://orcid.org/0000-0003-2164-3892, Smith, CL, Waring, K, Luckie, HM, Liu, A ORCID: https://orcid.org/0000-0001-9416-1726 and Howard, D ORCID: https://orcid.org/0000-0003-1738-0698 2016, 'A novel method of using accelerometry for upper limb FES control' , Medical Engineering & Physics, 38 (11) , pp. 1244-1250.

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Abstract

This paper reports on a novel approach to using a 3-axis accelerometer to capture body segment angle for upper limb functional electrical stimulation (FES) control. The approach calculates the angle between the accelerometer x-axis and the gravity vector, while avoiding poor sensitivity at certain angles and minimising errors when true acceleration is relatively large in comparison to gravity. This approach was incorporated into a state-machine controller which is used for the real-time control of FES during upper limb functional task performance. An experimental approach was used to validate the new method. Two participants with different upper limb impairments resulting from a stroke carried out four different FES-assisted tasks. Comparisons were made between angle calculated from arm-mounted accelerometer data using our algorithm and angle calculated from limb-mounted reflective marker data. After removal of coordinate misalignment error, mean error across tasks and subjects ranged between 1.4 and 2.9 degrees. The approach shows promise for use in the control of upper limb FES and other human movement applications where true acceleration is relatively small in comparison with gravity.

Item Type:	Article
Schools:	Schools > School of Health and Society > Centre for Health Sciences Research
Journal or Publication Title:	Medical Engineering & Physics
Publisher:	Elsevier
ISSN:	1350-4533
Related URLs:	Publication
Funders:	National Institute for Health Research New and Emerging Applications of Technology (NIHR NEAT) Programme
Depositing User:	Dr Mingxu Sun
Date Deposited:	20 Jun 2016 09:43
Last Modified:	15 Feb 2022 20:53
URI:	https://usir.salford.ac.uk/id/eprint/39186

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