Shrinkable Self-Similar Structure Design

2022 ◽  
pp. 1-10
Author(s):  
Yohei Yamamoto ◽  
Jun Mitani

Abstract Origami techniques, as folding and unfolding, can be utilized in shrinkable structures. Especially when the crease pattern is rigid foldable, it can be treated as a mechanical linkage of rigid panels connected by hinges. Since rigid foldable crease patterns have the strong geometrical constraint of the facets not being able to stretch or bend, it is difficult to design new crease patterns, and variations of existing patterns are limited. However, it is known that there are cases where crease patterns can be made rigid foldable by adding some slits. This paper proposes a mechanical linkage that folds into a similar flat shape by adding slits. A method is presented of generating rigid foldable crease patterns in arbitrary polygons that fold smaller, and it is confirmed that structures that have a mechanism for shrinking can be generated from these crease patterns by using rigid thick panels and hinges.

2021 ◽  
Author(s):  
Yohei Yamamoto ◽  
Jun Mitani

Abstract Origami techniques, as folding and unfolding, can be utilized in shrinkable structures. Especially when the crease pattern is rigid foldable, it can be treated as a mechanical linkage of rigid panels connected by hinges. Since rigid foldable crease patterns have the strong geometrical constraint of the facets not being able to stretch or bend, it is difficult to design new crease patterns, and variations of existing patterns are limited. However, it is known that there are cases where crease patterns can be made rigid foldable by adding some slits. This paper proposes a mechanical linkage that folds into a similar flat shape by adding slits. A method is presented of generating rigid foldable crease patterns in arbitrary polygons that fold smaller, and it is confirmed that structures that have a mechanism for shrinking can be generated from these crease patterns by using rigid thick panels and hinges.


2011 ◽  
Vol 474-476 ◽  
pp. 1069-1074
Author(s):  
Da Chang Zhu ◽  
Qi Hua Gu ◽  
Liang Wang ◽  
Fan Xiao

A novel type of 4-RPUR spatial compliant parallel manipulator which named whole compliant parallel manipulator (WCPM) is presented in this paper. Compared with traditional design method, a novel 4-RPUR type spatial compliant parallel manipulator which satisfy the geometrical constraint conditions in spatial is proposed. By using ANSYS software, the proposed two kinds of compliant parallel manipulator are analyzed. The effectiveness of the proposed method is verified by simulation and experiments.


2006 ◽  
Vol 20 ◽  
pp. 1-4
Author(s):  
A. Nusser
Keyword(s):  

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