Design and analysis of symmetric and compact 2R1T (in-plane 3-DOC) flexure parallel mechanisms

Symmetry is very necessary in flexure mechanisms, which can eliminate parasitic motions, avoid buckling, and minimize thermal and manufacturing sensitivity. This paper proposes two symmetric and compact flexure designs, in-plane 3-DOC (degree of constraint) mechanisms, which are composed of 4 and 6...

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Bibliographic Details
Published in:Mechanical sciences (Göttingen) 2017-01, Vol.8 (1), p.1-9
Main Author: Hao, Guangbo
Format: Article
Language:English
Subjects:
Compliance
Design
Flexing
Mathematical models
Stiffness
Stress concentration
Symmetry
Thermal buckling
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Summary:Symmetry is very necessary in flexure mechanisms, which can eliminate parasitic motions, avoid buckling, and minimize thermal and manufacturing sensitivity. This paper proposes two symmetric and compact flexure designs, in-plane 3-DOC (degree of constraint) mechanisms, which are composed of 4 and 6 identical wire beams, respectively. Compared to traditional leaf-beam-based designs, the two present designs have lower stiffness in the primary motion directions, and have smaller stiffness reduction in the parasitic directions. Analytical modelling is conducted to derive the symbolic compliance equations, enabling quick analysis and comparisons of compliances of the two mechanisms. A prototype has been tested statically to compare with analytical models.
ISSN:2191-916X
2191-9151
2191-916X
DOI:10.5194/ms-8-1-2017