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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MDPI AG
2021-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/21/9809 |
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| 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 |
| collection | DOAJ |
| 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. |
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| format | Article |
| id | doaj.art-ee95dc3ff60a42fba592d40dd413f774 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T06:08:03Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ee95dc3ff60a42fba592d40dd413f7742023-11-22T20:23:26ZengMDPI AGApplied Sciences2076-34172021-10-011121980910.3390/app11219809Experimental Testing of Passive Linear TMD for Postural Tremor AttenuationSarah Gebai0Mohammad Hammoud1Gwendal Cumunel2Gilles Foret3Emmanuel Roze4Elodie Hainque5Department of Mechanical Engineering, The International University of Beirut BIU, Beirut 146404, LebanonDepartment of Mechanical Engineering, The International University of Beirut BIU, Beirut 146404, LebanonLab Navier, Univ Gustave Eiffel, ENPC, CNRS, F-77447 Marne-la-Vallée, FranceLab Navier, Univ Gustave Eiffel, ENPC, CNRS, F-77447 Marne-la-Vallée, FranceFaculté de Médecine, Institut du Cerveau et de la Moëlle Epinière, Sorbonne Université, UMR S 1127, Inserm U 1127, UMR CNRS 7225, F-75013 Paris, FranceFaculté de Médecine, Institut du Cerveau et de la Moëlle Epinière, Sorbonne Université, UMR S 1127, Inserm U 1127, UMR CNRS 7225, F-75013 Paris, FranceResearch 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.https://www.mdpi.com/2076-3417/11/21/9809postural tremorexperimental armpassive tuned mass dampersignal processingexperimental testing |
| spellingShingle | Sarah Gebai Mohammad Hammoud Gwendal Cumunel Gilles Foret Emmanuel Roze Elodie Hainque Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation Applied Sciences postural tremor experimental arm passive tuned mass damper signal processing experimental testing |
| title | 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_short | Experimental Testing of Passive Linear TMD for Postural Tremor Attenuation |
| title_sort | experimental testing of passive linear tmd for postural tremor attenuation |
| topic | postural tremor experimental arm passive tuned mass damper signal processing experimental testing |
| url | https://www.mdpi.com/2076-3417/11/21/9809 |
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