In response to the problem that the actual amplification ratio of the compliant motion amplification mechanism cannot be further improved, this paper introduces a two-stage amplification microgripper based on structural stiffness that is driven by pneumatics. The mechanism not only has the advantages of good symmetry, compact structure, and large output displacement but can also reduce the relative error of the theoretical and experimental amplification ratios. The first-stage mechanism selects high-stiffness mechanisms and high-stiffness flexure hinges, and the second-stage mechanism uses low-stiffness mechanisms and low-stiffness flexure hinges. The arrangement order of the mechanism is determined by the working mode analysis. The specific dimensions of the mechanism and flexure hinges are determined through structural size optimization so that the amplification performance of the mechanism will be optimal. The experimental results show that the displacement amplification ratio of both the opening and closing of the microgripper is 41.8.
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July 2023
Research Article|
July 17 2023
Design and test a pneumatically actuated microgripper based on structural stiffness
Xiaodong Chen
;
Xiaodong Chen
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology
, Harbin 150001, China
2
School of Mechanical and Aerospace Engineering, Nanyang Technological University
, 639798, Singapore
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Zhimin Xie
;
Zhimin Xie
(Software)
1
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology
, Harbin 150001, China
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Kang Tai
;
Kang Tai
(Formal analysis)
2
School of Mechanical and Aerospace Engineering, Nanyang Technological University
, 639798, Singapore
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Huifeng Tan
;
Huifeng Tan
a)
(Funding acquisition, Project administration, Resources)
1
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology
, Harbin 150001, China
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Xueyan Chen
Xueyan Chen
a)
(Resources)
1
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology
, Harbin 150001, China
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Xiaodong Chen
1,2
Zhimin Xie
1
Kang Tai
2
Huifeng Tan
1,a)
Xueyan Chen
1,a)
1
National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology
, Harbin 150001, China
2
School of Mechanical and Aerospace Engineering, Nanyang Technological University
, 639798, Singapore
Rev. Sci. Instrum. 94, 075004 (2023)
Article history
Received:
February 25 2023
Accepted:
June 28 2023
Citation
Xiaodong Chen, Zhimin Xie, Kang Tai, Huifeng Tan, Xueyan Chen; Design and test a pneumatically actuated microgripper based on structural stiffness. Rev. Sci. Instrum. 1 July 2023; 94 (7): 075004. https://doi.org/10.1063/5.0147774
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