IEEE Robotics & Automation Magazine - December 2017 - 102

Solving Common Issues
Using Force Myography,
Surface Electromyography,
and Pattern Recognition
in a Pilot Case Study

IMAGE LICENSED BY INGRAM PUBLISHING

Toward
Intuitive
Prosthetic
Control

By Chakaveh Ahmadizadeh, Lukas-Karim Merhi,
Brittany Pousett, Sohail Sangha, and Carlo Menon

D

espite the appearance of advanced multi-degrees
of freedom (DoF) robotic hands during the past
decade, prosthetic control lacks a powerful interface to facilitate all its functionalities in a
manner that is acceptable for a majority of users
[1]. In this article, we explore the feasibility of using a sensing
technique called force myography (FMG) as an alternative or
synergist to the traditional surface electromyography (sEMG)
technique as a human-machine interface (HMI) for the
control of a multi-DoF prosthetic hand, bebionic 3 by Ottobock, Austin, Texas. In this article, we present a prosthetic
prototype developed for the Cybathlon 2016, a championship
for racing pilots with disabilities using assistive robotic
devices. The design of the prototype is discussed and the effect
Digital Object Identifier 10.1109/MRA.2017.2747899
Date of publication: 6 November 2017

102

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IEEE ROBOTICS & AUTOMATION MAGAZINE

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DECEMBER 2017

of two factors on its control is analyzed. These factors are 1)
the impact of a multisensory approach and 2) the placement
of FMG sensor strips within the prosthetic inner socket.
Analysis is performed by comparing resulting pattern
recognition accuracies. Results show that the use of both
sensing modalities (FMG and EMG) together produced the
highest pattern recognition accuracy (81.1%) for ten classes of
motion (four wrist movements and six grip patterns). We
demonstrated that FMG has the potential to be an HMI for
control of upper-limb-powered prostheses. FMG also illustrates the potential for intuitive control through the use of
pattern recognition. A multisensory approach could assist in
increasing robustness of the HMI for prosthetic control.
Overview of Upper-Limb Prostheses
Personal autonomy is one of the key factors affecting the
quality of daily life for individuals, and it is drastically
1070-9932/17©2017IEEE



Table of Contents for the Digital Edition of IEEE Robotics & Automation Magazine - December 2017

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