On Laterally Perturbed Human Stance: Experiment, Model, and Control
Understanding human balance is a key issue in many research areas. One goal is to suggest analytical models for the human balance. Specifically, we are interested in the stability of a subject when a lateral perturbation is being applied. Therefore, we conducted an experiment, laterally perturbing f...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Applied Bionics and Biomechanics |
| Online Access: | http://dx.doi.org/10.1155/2018/4767624 |
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| author | Dan Suissa Michael Günther Amir Shapiro Itshak Melzer Syn Schmitt |
| author_facet | Dan Suissa Michael Günther Amir Shapiro Itshak Melzer Syn Schmitt |
| author_sort | Dan Suissa |
| collection | DOAJ |
| description | Understanding human balance is a key issue in many research areas. One goal is to suggest analytical models for the human balance. Specifically, we are interested in the stability of a subject when a lateral perturbation is being applied. Therefore, we conducted an experiment, laterally perturbing five subjects on a mobile platform. We observed that the recorded motion is divided into two parts. The legs act together as a first, the head-arms-trunk segment as a second rigid body with pelvis, and the ankle as hinge joints. Hence, we suggest using a planar double-inverted pendulum model for the analysis. We try to reproduce the human reaction utilizing torque control, applied at the ankle and pelvis. The fitting was realized by least square and nonlinear unconstrained optimization on training sets. Our model is not only able to fit to the human reaction, but also to predict it on test sets. We were able to extract and review key features of balance, like torque coupling and delays as outcomes of the aforementioned optimization process. Furthermore, the delays are well within the ranges typically for such compensatory motions, composed of reflex and higher level motor control. |
| format | Article |
| id | doaj-art-b0668e3426aa4cb183b433a6e26f78cc |
| institution | Kabale University |
| issn | 1176-2322 1754-2103 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied Bionics and Biomechanics |
| spelling | doaj-art-b0668e3426aa4cb183b433a6e26f78cc2025-08-20T03:39:18ZengWileyApplied Bionics and Biomechanics1176-23221754-21032018-01-01201810.1155/2018/47676244767624On Laterally Perturbed Human Stance: Experiment, Model, and ControlDan Suissa0Michael Günther1Amir Shapiro2Itshak Melzer3Syn Schmitt4Biomechanics and Biorobotics, Universität Stuttgart, 70569 Stuttgart, GermanyBiomechanics and Biorobotics, Universität Stuttgart, 70569 Stuttgart, GermanyDepartment of Mechanical Engineering, Faculty of Engineering, Ben-Gurion University of the Negev, Beer-Sheva, IsraelSchwartz Movement Analysis & Rehabilitation Laboratory, Department of Physical Therapy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, IsraelBiomechanics and Biorobotics, Universität Stuttgart, 70569 Stuttgart, GermanyUnderstanding human balance is a key issue in many research areas. One goal is to suggest analytical models for the human balance. Specifically, we are interested in the stability of a subject when a lateral perturbation is being applied. Therefore, we conducted an experiment, laterally perturbing five subjects on a mobile platform. We observed that the recorded motion is divided into two parts. The legs act together as a first, the head-arms-trunk segment as a second rigid body with pelvis, and the ankle as hinge joints. Hence, we suggest using a planar double-inverted pendulum model for the analysis. We try to reproduce the human reaction utilizing torque control, applied at the ankle and pelvis. The fitting was realized by least square and nonlinear unconstrained optimization on training sets. Our model is not only able to fit to the human reaction, but also to predict it on test sets. We were able to extract and review key features of balance, like torque coupling and delays as outcomes of the aforementioned optimization process. Furthermore, the delays are well within the ranges typically for such compensatory motions, composed of reflex and higher level motor control.http://dx.doi.org/10.1155/2018/4767624 |
| spellingShingle | Dan Suissa Michael Günther Amir Shapiro Itshak Melzer Syn Schmitt On Laterally Perturbed Human Stance: Experiment, Model, and Control Applied Bionics and Biomechanics |
| title | On Laterally Perturbed Human Stance: Experiment, Model, and Control |
| title_full | On Laterally Perturbed Human Stance: Experiment, Model, and Control |
| title_fullStr | On Laterally Perturbed Human Stance: Experiment, Model, and Control |
| title_full_unstemmed | On Laterally Perturbed Human Stance: Experiment, Model, and Control |
| title_short | On Laterally Perturbed Human Stance: Experiment, Model, and Control |
| title_sort | on laterally perturbed human stance experiment model and control |
| url | http://dx.doi.org/10.1155/2018/4767624 |
| work_keys_str_mv | AT dansuissa onlaterallyperturbedhumanstanceexperimentmodelandcontrol AT michaelgunther onlaterallyperturbedhumanstanceexperimentmodelandcontrol AT amirshapiro onlaterallyperturbedhumanstanceexperimentmodelandcontrol AT itshakmelzer onlaterallyperturbedhumanstanceexperimentmodelandcontrol AT synschmitt onlaterallyperturbedhumanstanceexperimentmodelandcontrol |