The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Alexander Badri-spröwitz - One of the best experts on this subject based on the ideXlab platform.
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FootTile: a Rugged Foot Sensor for Force and Center of Pressure Sensing in Soft Terrain
arXiv: Robotics, 2020Co-Authors: Felix Ruppert, Alexander Badri-spröwitzAbstract:In this paper we present FootTile, a foot sensor for reaction force and Center of Pressure sensing in challenging terrain. We compare our sensor design to standard biomechanical devices, force plates and Pressure plates. We show that FootTile can accurately estimate force and Pressure distribution during legged locomotion. FootTile weighs 0.9g, has a sampling rate of 330Hz, a footprint of 10 by 10mm and can easily be adapted in sensor range to the required load case. In three experiments we validate: first the performance of the individual sensor, second an array of FootTiles for Center of Pressure sensing and third the ground reaction force estimation during locomotion in granular substrate. We then go on to show the accurate sensing capabilities of the waterproof sensor in liquid mud, as a showcase for real world rough terrain use.
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ICRA - FootTile: a Rugged Foot Sensor for Force and Center of Pressure Sensing in Soft Terrain
2020 IEEE International Conference on Robotics and Automation (ICRA), 2020Co-Authors: Felix Ruppert, Alexander Badri-spröwitzAbstract:In this paper, we present FootTile, a foot sensor for reaction force and Center of Pressure sensing in challenging terrain. We compare our sensor design to standard biomechanical devices, force plates and Pressure plates. We show that FootTile can accurately estimate force and Pressure distribution during legged locomotion. FootTile weighs 0.9 g, has a sampling rate of 330 Hz, a footprint of 10×10 mm and can easily be adapted in sensor range to the required load case. In three experiments, we validate: first, the performance of the individual sensor, second an array of FootTiles for Center of Pressure sensing and third the ground reaction force estimation during locomotion in granular substrate. We then go on to show the accurate sensing capabilities of the waterproof sensor in liquid mud, as a showcase for real world rough terrain use.
Nicolas Vuillerme - One of the best experts on this subject based on the ideXlab platform.
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variability of spatial temporal gait parameters and Center of Pressure displacements during gait in elderly fallers and nonfallers a 6 month prospective study
PLOS ONE, 2017Co-Authors: Zdenek Svoboda, Lucia Bizovska, Miroslav Janura, Eliska Kubonova, Katerina Janurova, Nicolas VuillermeAbstract:Considering that most of the falls in elderly population arise during walking, tests derived from walking performance would be desirable for comprehensive fall risk assessment. The analysis of spatial temporal parameters and the Center of Pressure displacement, which represents the interaction between the human body and the ground, would be beneficial. The aim of this study was to compare spatial temporal gait parameters and their variability and the variability of the Center of Pressure displacement between elderly fallers and nonfallers during gait at self-selected, defined and fast speeds. A prospective study design was used. At the baseline, measurements of ground reaction force during gait at self-selected, defined and fast walking speeds by two force plates were performed. In addition, the Tinetti balance assessment tool, the Falls Efficacy Scale-International and the Activities-Specific Balance Confidence Scale were used. Mean and coefficient of variation of spatial temporal gait parameters and standard deviations of Center of Pressure displacement during loading response, midstance, terminal stance and preswing phases were calculated. Comparison of the fallers and nonfallers exhibited no significant difference in clinical tool, scales or spatial temporal parameters. Compared to nonfallers’ increased variability of walking speed at self-selected and defined speed, step width at fast walking speed and Center of Pressure displacement during preswing phase in medial-lateral directions at defined walking speed was found in fallers. However, application of the Holm-Bonferroni procedure for multiple comparisons exhibited no significant effect of group in any of the gait parameters. In general, our study did not observe an effect of group (fallers vs. nonfallers) on variability of spatial temporal parameters and Center of Pressure movement during gait. However, walking speed, step width as well as standard deviation of COP displacement in the medial-lateral direction during preswing exhibited a certain potential for distinguishing between elderly fallers and nonfallers.
Felix Ruppert - One of the best experts on this subject based on the ideXlab platform.
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FootTile: a Rugged Foot Sensor for Force and Center of Pressure Sensing in Soft Terrain
arXiv: Robotics, 2020Co-Authors: Felix Ruppert, Alexander Badri-spröwitzAbstract:In this paper we present FootTile, a foot sensor for reaction force and Center of Pressure sensing in challenging terrain. We compare our sensor design to standard biomechanical devices, force plates and Pressure plates. We show that FootTile can accurately estimate force and Pressure distribution during legged locomotion. FootTile weighs 0.9g, has a sampling rate of 330Hz, a footprint of 10 by 10mm and can easily be adapted in sensor range to the required load case. In three experiments we validate: first the performance of the individual sensor, second an array of FootTiles for Center of Pressure sensing and third the ground reaction force estimation during locomotion in granular substrate. We then go on to show the accurate sensing capabilities of the waterproof sensor in liquid mud, as a showcase for real world rough terrain use.
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ICRA - FootTile: a Rugged Foot Sensor for Force and Center of Pressure Sensing in Soft Terrain
2020 IEEE International Conference on Robotics and Automation (ICRA), 2020Co-Authors: Felix Ruppert, Alexander Badri-spröwitzAbstract:In this paper, we present FootTile, a foot sensor for reaction force and Center of Pressure sensing in challenging terrain. We compare our sensor design to standard biomechanical devices, force plates and Pressure plates. We show that FootTile can accurately estimate force and Pressure distribution during legged locomotion. FootTile weighs 0.9 g, has a sampling rate of 330 Hz, a footprint of 10×10 mm and can easily be adapted in sensor range to the required load case. In three experiments, we validate: first, the performance of the individual sensor, second an array of FootTiles for Center of Pressure sensing and third the ground reaction force estimation during locomotion in granular substrate. We then go on to show the accurate sensing capabilities of the waterproof sensor in liquid mud, as a showcase for real world rough terrain use.
Lishan Chou - One of the best experts on this subject based on the ideXlab platform.
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Center of Pressure trajectory differences between shod and barefoot running
Gait & Posture, 2014Co-Authors: James Becker, Eric Pisciotta, Stan James, Louis R Osternig, Lishan ChouAbstract:A B S T R A C T This study examined differences in Center of Pressure (COP) trajectories between shod and barefoot running. Ten habitually shod runners ran continuous laps under both shod and barefoot conditions. The COP trajectory was calculated in the global coordinate system but then transformed to the anatomic coordinate system of the foot. The anterior–posterior and medio-lateral positions and excursions of the COP, as well as the most medial location and percent stand at which it occurred were examined. Additionally, external eversion moments and ground reaction forces were assessed. Compared to the shod condition, in the barefoot condition the COP was located more anteriorly early in stance and the COP was located significantly more medially at most time points across stance. There were no differences in external eversion moments during early stance or peak ground reaction forces between conditions. Future studies on mechanical or epidemiological differences between shod and barefoot running may find the COP trajectory an informative parameter to examine.
Ruth E. Mayagoitia - One of the best experts on this subject based on the ideXlab platform.
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Identification of the relationship between Center of Pressure and ankle angle during standing of normal subjects
Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1Co-Authors: Winnie Jensen, L.n.s. Andreasen, Peter H. Veltink, Ruth E. MayagoitiaAbstract:The relationship between movement of Center of Pressure (COP) and the ankle angle in one foot in the sagittal plane was examined during standing of a normal subject. The body was regarded as an inverted pendulum, where bracing prevented flexion of the hip and knee joints. The Center of Pressure was calculated from recorded force plate data, where the subject was standing with one foot on a force plate. The ankle angle was measured using 3D coordinates from optical markers. A 2nd order transfer function between COP and ankle angle was estimated using a system identification method. The results showed that COP can be related to the ankle angle during standing, when the body is regarded as an inverted pendulum. This indicates that COP provides information about the body movement. It is suggested that COP possibly can be used as feedback to stabilize the inverted pendulum.