NDLI: Assistance of the elbow flexion motion on the active elbow orthosis using muscular stiffness force feedback

Content Provider	Springer Nature Link
Author	Kim, Kyung Hong, Kyung Ju Kim, Nam Gyun Kwon, Tae Kyu
Copyright Year	2011
Abstract	An elbow orthosis with pneumatic artificial muscles has been developed to assist and enhance upper limbs movements and has been examined for effectiveness. The effectiveness of the elbow orthosis was examined by comparing muscular activities during alternate dumbbell curl motion wearing and without wearing the orthosis. The subjects participating in the experiment were young adults in their twenties. The subjects were instructed to perform a dumbbell curl motion in a sitting position with and without wearing an orthosis in turn, and a dynamometer was used to measure elbow joint torque in isokinetic mode. The measurements were done with four various dumbbell loads: 0, 1, 3, and 5 kg. We examined the effectiveness of the elbow orthosis in two control methods. First, the orthosis was pneumatically actuated and controlled in the passive control mode. Then, it was controlled in the active control mode using the muscular stiffness force of the muscle that is measured from a force sensor through a cDAQ-9172 board. For the analysis of muscular power, the muscular activities of the subject were measured during alternate dumbbell curl motion using MP150 (BIOPAC Systems, Inc.). The muscles of interest were biceps brachii muscle, triceps brachii muscle, brachioradialis muscle, and flexor carpi ulnaris muscle in the upper limbs of the right side. The elbow joint torque was measured during elbow flexion motion using a dynamometer at 60° per second for isokinetic strength. The experimental result showed that the muscular activities wearing the elbow orthosis were reduced and elbow joint torque wearing the elbow orthosis was higher because of the assist of the orthosis. As a result of this experiment, the effectiveness of the developed elbow orthosis was confirmed and the level of assistance was quantified. With this, we confirmed the effectiveness of the developed elbow orthosis.
Starting Page	3195
Ending Page	3203
Page Count	9
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	25
Issue Number	12
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2012-01-08
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Muscular stiffness force feedback Active elbow orthosis Elbow flexion motion Industrial and Production Engineering Vibration, Dynamical Systems, Control Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering

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