Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation

Research interest to provide a mechanical solution for involuntary tremors is increasing due to the severe side effects caused by the medications used to lessen its symptoms. This paper deals with the design of a cantilever-type tuned mass damper (TMD) used to prove the effectiveness of passive cont...

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Autores principales:	Sarah Gebai, Mohammad Hammoud, Gwendal Cumunel, Gilles Foret, Emmanuel Roze, Elodie Hainque
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	postural tremor experimental arm passive tuned mass damper signal processing experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ee95dc3ff60a42fba592d40dd413f774
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spelling	oai:doaj.org-article:ee95dc3ff60a42fba592d40dd413f7742021-11-11T14:57:32ZExperimental Testing of Passive Linear TMD for Postural Tremor Attenuation10.3390/app112198092076-3417https://doaj.org/article/ee95dc3ff60a42fba592d40dd413f7742021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9809https://doaj.org/toc/2076-3417Research interest to provide a mechanical solution for involuntary tremors is increasing due to the severe side effects caused by the medications used to lessen its symptoms. This paper deals with the design of a cantilever-type tuned mass damper (TMD) used to prove the effectiveness of passive controllers in reducing the involuntary tremor’s vibrational signals transmitted by the muscles to the hand segment. TMD is tested on an experimental arm, reflecting the flexion-extension motion of the wrist, excited by a mechanical shaker with the measured tremor signal of a patient with essential tremor. The designed TMD provides a new operational frequency for each position of the screw fixed to its beam. Modal damping ratios are also calculated using different methods for each position. The effectiveness of the TMD is quantified by measurements using a vibrometer and inertial measurement unit. Three TMDs, representing 15.7% total mass ratio, cause a reduction of 29% for the acceleration, 69% for the velocity, 79% for the displacement, 67% for the angular velocity, and 82% for the angular displacement signals. These encouraging results will allow the improvement of the design of the passive controller in the form of a wearable bracelet suitable for daily life.Sarah GebaiMohammad HammoudGwendal CumunelGilles ForetEmmanuel RozeElodie HainqueMDPI AGarticlepostural tremorexperimental armpassive tuned mass dampersignal processingexperimental testingTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9809, p 9809 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	postural tremor experimental arm passive tuned mass damper signal processing experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	postural tremor experimental arm passive tuned mass damper signal processing experimental testing Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Sarah Gebai Mohammad Hammoud Gwendal Cumunel Gilles Foret Emmanuel Roze Elodie Hainque Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
description	Research interest to provide a mechanical solution for involuntary tremors is increasing due to the severe side effects caused by the medications used to lessen its symptoms. This paper deals with the design of a cantilever-type tuned mass damper (TMD) used to prove the effectiveness of passive controllers in reducing the involuntary tremor’s vibrational signals transmitted by the muscles to the hand segment. TMD is tested on an experimental arm, reflecting the flexion-extension motion of the wrist, excited by a mechanical shaker with the measured tremor signal of a patient with essential tremor. The designed TMD provides a new operational frequency for each position of the screw fixed to its beam. Modal damping ratios are also calculated using different methods for each position. The effectiveness of the TMD is quantified by measurements using a vibrometer and inertial measurement unit. Three TMDs, representing 15.7% total mass ratio, cause a reduction of 29% for the acceleration, 69% for the velocity, 79% for the displacement, 67% for the angular velocity, and 82% for the angular displacement signals. These encouraging results will allow the improvement of the design of the passive controller in the form of a wearable bracelet suitable for daily life.
format	article
author	Sarah Gebai Mohammad Hammoud Gwendal Cumunel Gilles Foret Emmanuel Roze Elodie Hainque
author_facet	Sarah Gebai Mohammad Hammoud Gwendal Cumunel Gilles Foret Emmanuel Roze Elodie Hainque
author_sort	Sarah Gebai
title	Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
title_short	Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
title_full	Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
title_fullStr	Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
title_full_unstemmed	Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation
title_sort	experimental testing of passive linear tmd for postural tremor attenuation
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ee95dc3ff60a42fba592d40dd413f774
work_keys_str_mv	AT sarahgebai experimentaltestingofpassivelineartmdforposturaltremorattenuation AT mohammadhammoud experimentaltestingofpassivelineartmdforposturaltremorattenuation AT gwendalcumunel experimentaltestingofpassivelineartmdforposturaltremorattenuation AT gillesforet experimentaltestingofpassivelineartmdforposturaltremorattenuation AT emmanuelroze experimentaltestingofpassivelineartmdforposturaltremorattenuation AT elodiehainque experimentaltestingofpassivelineartmdforposturaltremorattenuation
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Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation

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