Towards exoskeletons with balance capacities

Herman van der Kooij*, Edwin H.F. van Asseldonk, Mark Vlutters

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

2 Citations (Scopus)
2 Downloads (Pure)

Abstract

Current exoskeletons replay pre-programmed trajectories at the actuated joints. Towards the employment of exoskeletons with more flexible and adaptive behavior, we investigate human balance control during gait. We study human balance control by applying brief force pulses at the pelvis in different directions, with different amplitude, and applied at different phases of the gait phase. The observed changes were dependent on the phase at which the perturbation was applied and the walking velocity. From the results we concluded that foot placement was the dominant strategy in the frontal plane, center of pressure (CoP) modulation in the double support phase was utilized in the sagittal plane, and the duration of the swing and double support phase changed. Without the ability to control the CoP through an ankle torque, humans also used a foot placement strategy in the sagittal plane. The center of pressure with respect to the center of mass at the end of the double support phase was linearly related to velocity of the center of mass at the end of the preceding swing phase, which is in agreement with extrapolated center of mass or capture point based stepping strategies previously applied in simple models.

Original languageEnglish
Title of host publicationWearable Robotics
Subtitle of host publicationChallenges and Trends
EditorsJosé González-Vargas, Jaime Ibáñez, Jose L. Contreras-Vidal, Herman van der Kooij, José Luis Pons
PublisherSpringer
Pages175-179
Number of pages5
ISBN (Electronic)978-3-319-46532-6
ISBN (Print)978-3-319-46531-9
DOIs
Publication statusPublished - 2017

Publication series

NameBiosystems and Biorobotics
PublisherSpringer International Publishing AG
Volume16
ISSN (Print)2195-3562
ISSN (Electronic)2195-3570

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Torque
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Modulation

Cite this

van der Kooij, H., van Asseldonk, E. H. F., & Vlutters, M. (2017). Towards exoskeletons with balance capacities. In J. González-Vargas, J. Ibáñez, J. L. Contreras-Vidal, H. van der Kooij, & J. L. Pons (Eds.), Wearable Robotics: Challenges and Trends (pp. 175-179). (Biosystems and Biorobotics; Vol. 16). Springer. https://doi.org/10.1007/978-3-319-46532-6_29
van der Kooij, Herman ; van Asseldonk, Edwin H.F. ; Vlutters, Mark. / Towards exoskeletons with balance capacities. Wearable Robotics: Challenges and Trends. editor / José González-Vargas ; Jaime Ibáñez ; Jose L. Contreras-Vidal ; Herman van der Kooij ; José Luis Pons. Springer, 2017. pp. 175-179 (Biosystems and Biorobotics).
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van der Kooij, H, van Asseldonk, EHF & Vlutters, M 2017, Towards exoskeletons with balance capacities. in J González-Vargas, J Ibáñez, JL Contreras-Vidal, H van der Kooij & JL Pons (eds), Wearable Robotics: Challenges and Trends. Biosystems and Biorobotics, vol. 16, Springer, pp. 175-179. https://doi.org/10.1007/978-3-319-46532-6_29

Towards exoskeletons with balance capacities. / van der Kooij, Herman; van Asseldonk, Edwin H.F.; Vlutters, Mark.

Wearable Robotics: Challenges and Trends. ed. / José González-Vargas; Jaime Ibáñez; Jose L. Contreras-Vidal; Herman van der Kooij; José Luis Pons. Springer, 2017. p. 175-179 (Biosystems and Biorobotics; Vol. 16).

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

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AB - Current exoskeletons replay pre-programmed trajectories at the actuated joints. Towards the employment of exoskeletons with more flexible and adaptive behavior, we investigate human balance control during gait. We study human balance control by applying brief force pulses at the pelvis in different directions, with different amplitude, and applied at different phases of the gait phase. The observed changes were dependent on the phase at which the perturbation was applied and the walking velocity. From the results we concluded that foot placement was the dominant strategy in the frontal plane, center of pressure (CoP) modulation in the double support phase was utilized in the sagittal plane, and the duration of the swing and double support phase changed. Without the ability to control the CoP through an ankle torque, humans also used a foot placement strategy in the sagittal plane. The center of pressure with respect to the center of mass at the end of the double support phase was linearly related to velocity of the center of mass at the end of the preceding swing phase, which is in agreement with extrapolated center of mass or capture point based stepping strategies previously applied in simple models.

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PB - Springer

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van der Kooij H, van Asseldonk EHF, Vlutters M. Towards exoskeletons with balance capacities. In González-Vargas J, Ibáñez J, Contreras-Vidal JL, van der Kooij H, Pons JL, editors, Wearable Robotics: Challenges and Trends. Springer. 2017. p. 175-179. (Biosystems and Biorobotics). https://doi.org/10.1007/978-3-319-46532-6_29