Development of models for additively manufactured actuators using compliant Wren mechanism
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Authors
Author (Corporation)
Publication date
11.2021
Typ of student thesis
Course of study
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Precision Engineering
Special issue
DOI of the original publication
Link
Series
Series number
Volume
72
Issue / Number
Pages / Duration
304-314
Patent number
Publisher / Publishing institution
Elsevier
Place of publication / Event location
Edition
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Programming language
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Practice partner / Client
Abstract
Compliant Wren mechanisms (CWM) constitute specific compliant structures of particular interest. Derived from Wren mechanisms, they can exhibit a large variety of motions, from quasi translation to quasi rotation. In this paper, the development of models for the analysis and synthesis of CWM is considered. A kinematic model is introduced first to assess all possible motions when used as an actuator. Then the static model and stress expressions are derived to help their design. These derivations are achieved for two types of geometries, corresponding to the geometries of interest. CWM are filigree structures, whose manufacturing is difficult to consider without additive manufacturing. A specific work on their production using selective laser melting (SLM) is then achieved to ensure the reliability of their production. As a proof of concept, a pneumatically actuated component is then developed and tested. It is composed of two CWM of different geometries. It offers the possibility to obtain translation and rotation using a single pressure input. The developed models are investigated using finite element models and experiments using additively manufactured structures.
Keywords
Wren mechanism, Compliant mechanism, Additive manufacturing, Titanium
Subject (DDC)
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ISBN
ISSN
0141-6359
1873-2372
1873-2372
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
License
Citation
Lennart, R., Schuler, F., Gayral, T., de Wild, M., & Renaud, P. (2021). Development of models for additively manufactured actuators using compliant Wren mechanism. Precision Engineering, 72, 304–314. https://doi.org/10.1016/j.precisioneng.2021.05.002