A novel method of using accelerometry for upper limb FES control.

SUN, Mingxu, KENNEY, Laurence, SMITH, Christine, WARING, Karen, LUCKIE, Helen, LIU, Anmin and HOWARD, David (2016). A novel method of using accelerometry for upper limb FES control. Medical engineering & physics, 38 (11), 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 minimizing 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 up- per 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 °. 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
Identification Number:	https://doi.org/10.1016/j.medengphy.2016.06.005
Page Range:	1244-1250
SWORD Depositor:	Ann Betterton
Depositing User:	Ann Betterton
Date Deposited:	08 Nov 2016 14:09
Last Modified:	18 Mar 2021 10:31
URI:	https://shura.shu.ac.uk/id/eprint/13946

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