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Lee YK, Hao Y, Xi Z, Kim W, Park Y, Cho KJ, Lien JM, Choi IS. Zygote structure enables pluripotent shape-transforming deployable structure. PNAS Nexus 2023; 2:pgad022. [PMID: 36926227 PMCID: PMC10013337 DOI: 10.1093/pnasnexus/pgad022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 03/17/2023]
Abstract
We propose an algorithmic framework of a pluripotent structure evolving from a simple compact structure into diverse complex 3D structures for designing the shape-transformable, reconfigurable, and deployable structures and robots. Our algorithmic approach suggests a way of transforming a compact structure consisting of uniform building blocks into a large, desired 3D shape. Analogous to a fertilized egg cell that can grow into a preprogrammed shape according to coded information, compactly stacked panels named the zygote structure can evolve into arbitrary 3D structures by programming their connection path. Our stacking algorithm obtains this coded sequence by inversely stacking the voxelized surface of the desired structure into a tree. Applying the connection path obtained by the stacking algorithm, the compactly stacked panels named the zygote structure can be deployed into diverse large 3D structures. We conceptually demonstrated our pluripotent evolving structure by energy-releasing commercial spring hinges and thermally actuated shape memory alloy hinges, respectively. We also show that the proposed concept enables the fabrication of large structures in a significantly smaller workspace.
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Affiliation(s)
- Yu-Ki Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea
| | - Yue Hao
- Department of Computer Science, George Mason University, Fairfax, VA 22030, USA
| | - Zhonghua Xi
- Department of Computer Science, George Mason University, Fairfax, VA 22030, USA
| | - Woongbae Kim
- Soft Robotics Research Center, Seoul National University, Seoul 08826, Republic of Korea.,Department of Mechanical and Aerospace Engineering, Institute of Advanced Machines and Design, Seoul National University, Seoul, Republic of Korea
| | - Youngmin Park
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea
| | - Kyu-Jin Cho
- Soft Robotics Research Center, Seoul National University, Seoul 08826, Republic of Korea.,Department of Mechanical and Aerospace Engineering, Institute of Advanced Machines and Design, Seoul National University, Seoul, Republic of Korea
| | - Jyh-Ming Lien
- Department of Computer Science, George Mason University, Fairfax, VA 22030, USA
| | - In-Suk Choi
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul 08826, Republic of Korea
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