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Characterizing force capability and stiffness of hip exosuits under different anchor points
Jihun Kim1, Junyoung Moon1, Sungjin Park1
1Departement of Mechanical Engineering, College of Engineering, Chung-Ang University, Seoul, Republic of Korea.
Plos One
|August 4, 2022
Summary
Optimizing soft exosuit design requires understanding anchor point placement. Increasing the distance between waist and thigh anchor points enhances force capability but reduces human-suit stiffness.
Area of Science:
- Robotics
- Biomechanics
- Human-Computer Interaction
Background:
- Soft exosuits offer advantages due to their flexible nature.
- However, their deformable characteristics can lead to energy dissipation and reduced force transfer efficiency compared to rigid exoskeletons.
Purpose of the Study:
- To investigate the impact of anchor point positions on the force capability and human-suit stiffness of soft exosuits.
- To provide insights for optimizing exosuit design.
Main Methods:
- Conducted human subject experiments to analyze the relationships between anchor point positions, force capability, and human-suit stiffness.
- Utilized statistical analyses to verify significant differences at a 5% significance level.
Main Results:
- Force capability increased as the distance between waist belt and thigh brace anchor points increased.
- Human-suit stiffness decreased with increased distance between these anchor points.
- Effective cable stroke and body curve interference were identified as key factors influencing these outcomes.
Conclusions:
- Anchor point positioning significantly affects both force capability and human-suit stiffness in soft exosuits.
- Findings can guide the design of new exosuits or optimization of existing ones to maximize desired performance characteristics.
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