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Updated: Jul 31, 2025

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Recent Developments of Actuation Mechanisms for Continuum Robots: A Review
Ibrahim A Seleem1,2, Haitham El-Hussieny3,4, Hiroyuki Ishii1
1Department of Modern Mechanical Engineering, Faculty of Science and Engineering, Waseda University, Tokyo, Japan.
Summary
Soft continuum robots offer advantages over rigid robots in complex environments. This review examines their actuation systems and control strategies for future development.
Area of Science:
- Robotics
- Biomimetics
- Mechanical Engineering
Background:
- Traditional rigid robots struggle with maneuverability and safety in confined spaces.
- Soft continuum robots, inspired by biological structures, offer compliance and adaptability.
- Existing soft robots utilize cable, pneumatic, or hydraulic actuation for bending motion.
Purpose of the Study:
- To review the advantages and disadvantages of various soft robot actuation systems.
- To provide a reference for recent advancements in soft robot actuation technology.
- To guide future applications by surveying control strategies for continuum robots.
Main Methods:
- Literature review of soft continuum robot actuation systems.
- Analysis of merits and drawbacks of different actuation techniques (cable, pneumatic, hydraulic).
- Survey of recent studies on controller design for continuum robots.
Main Results:
- Soft robots demonstrate superior performance in complex environments due to inherent compliance.
- Actuation mechanisms, motion planning, and control remain challenging due to high redundancy and non-linearity.
- Various actuation methods offer distinct benefits and limitations for specific applications.
Conclusions:
- Soft continuum robots present a viable alternative to rigid robots for intricate tasks.
- Further research is needed in actuation design, motion planning, and control algorithms.
- This review serves as a valuable resource for researchers and developers in soft robotics.
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