Journal
IEEE ROBOTICS AND AUTOMATION LETTERS
Volume 7, Issue 2, Pages 4535-4541Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LRA.2022.3151164
Keywords
Magnetic soft robot; liquid metal; programmable magnetization; variable stiffness
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Funding
- National Natural Science Foundation of China [61973293]
- Postdoctoral Science Foundation of China [2021M700780]
- Key Project of Foreign Cooperation for International Partner Program of the Chinese Academy of Sciencest [121835KYSB20190069]
- Quanzhou Science and Technology Project [2019C012R]
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This study proposes a functionally reconfigurable soft robot based on composites, which can achieve variable responses and stiffness through re-patterning of magnetic domains and stiffness programming technique. It has broad prospects for various applications.
Magneto-actuated soft robots have broad prospects for biomedical applications, such as cell manipulation, drug delivery, and noninvasive intervention. However, the single function and unchangeable stiffness restrict their practicality. Therefore, the work presented a functionally reconfigurable soft robot based on Callium/NdFeB/PDMS composites. A heating-free reprogrammable magnetization technique was proposed to regulate the robot's response actions through re-patterning the magnetic domains. Moreover, a stiffness programming technique in terms of the liquid-metal thermotropic phase transition was employed to regulate the robot's stiffness. Four robot prototypes were constructed and tested. Experimental results showed that the robot performed variable responses and changeable stiffness, which satisfied different manipulation tasks. Therefore, the soft robot was endowed with variable functions and reusable characteristics. The proposed technique is expected to be applied to the batch manufacturing of intelligent soft machines.
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