Effects of hip torque during step-to-step transition on center-of-mass dynamics during human walking examined with numerical simulation

Hao, Ming; Chen, Ken; Fu, Chenglong

doi:10.1016/j.jbiomech.2019.04.025

Journal of Biomechanics

2019

DOI: 10.1016/j.jbiomech.2019.04.025

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Effects of hip torque during step-to-step transition on center-of-mass dynamics during human walking examined with numerical simulation

Ming Hao

Ken Chen

Chenglong Fu

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Cited by 7 publications

(2 citation statements)

References 27 publications

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“…In the process, hip flexor and extensor muscles generate a large amount of biological work, thus leading to significant metabolic power expenditure [5]- [7]. Studies showed that hip torque actuation can reduce the energy cost and improve the stability of walking [8], [9].…”

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confidence: 99%

Biomechanical and Physiological Evaluation of Biologically-Inspired Hip Assistance With Belt-Type Soft Exosuits

Chen

Guo

Wang

et al. 2022

IEEE Trans. Neural Syst. Rehabil. Eng.

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Hip-assisted soft exosuits have been reported for their effect on reducing the metabolic power of human walking. Currently, most studies focus on uni-directional assistance (HF: hip flexion, or HE: hip extension). This paper investigates the effect of bi-directional assistance (HFE: hip flexion and extension) on the biomechanics and physiology of the wearer for understanding the potential benefits in synergistic effect of multi-muscle assistance. A belt-type soft exosuit was developed to provide the bi-directional assistance for augmenting walking. The assistance strategy was presented by imitating the contraction mechanisms of hip flexor and extensor muscles in walking. Tests on 8 healthy subjects were conducted and the results were compared with traditional uni-directional assistance. Metabolic powers, muscle activities, kinematics, and kinetics were measured and analyzed. Results showed that HFE assistance reduced the metabolic power by 7% and 12.4% relative to no exosuit and assistance turned off, respectively, larger than the sum of HF and HE. Furthermore, HFE reduced more total joint positive biological work and the activity of more related muscles, and at the same time increased upward and downward accelerations of body mass center, promoting walking energy exchange. These findings demonstrate that bi-directional assistance by combining hip flexion and extension has a significant synergistic effect on augmenting human walking as well as a benefit of increasing biological efficiency.

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confidence: 99%

Biomechanical and Physiological Evaluation of Biologically-Inspired Hip Assistance With Belt-Type Soft Exosuits

Chen

Guo

Wang

et al. 2022

IEEE Trans. Neural Syst. Rehabil. Eng.

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“…This period covers 20% of the total gait duration and is directly dependent on speed, namely, it decreases as the speed increases. [37][38][39][40][41][42][43].…”

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confidence: 99%

The Influence of Different Loads on the Footbridge Dynamic Parameters

et al. 2020

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Bringing together the experience and knowledge of engineers allowed building modern footbridges as very slender structures. This in turn has led to structural vibration problems, which is a direct consequence of slender structures. In some footbridges, this problem occurs when natural construction frequencies are close to excitation frequencies. This requires a design methodology, which would ensure user safety and convenience of use of the footbridge in operation. Considering the aforementioned dynamic response, the analysis of the finite element model of a footbridge was conducted focusing on critical acceleration and deformation meanings. The model was based on the footbridge prototype located in Vilnius, Lithuania. Two different loading methods were developed to investigate the dynamic effects caused by people crossing a footbridge. The comparison of experimental and finite element model (FEM) results revealed that the footbridge in operation is within the limit values of comfort requirements in terms of its vibrations.

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Gait transition and orbital stability analysis for a biped robot based on the V-DSLIP model with torso and swing leg dynamics

2022

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Effects of hip torque during step-to-step transition on center-of-mass dynamics during human walking examined with numerical simulation

Cited by 7 publications

References 27 publications

Biomechanical and Physiological Evaluation of Biologically-Inspired Hip Assistance With Belt-Type Soft Exosuits

Biomechanical and Physiological Evaluation of Biologically-Inspired Hip Assistance With Belt-Type Soft Exosuits

The Influence of Different Loads on the Footbridge Dynamic Parameters

Gait transition and orbital stability analysis for a biped robot based on the V-DSLIP model with torso and swing leg dynamics

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