Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86688
Title: Synthesis of multiple degrees-of-freedom spatial-motion compliant parallel mechanisms with desired stiffness and dynamics characteristics
Authors: Pham, Minh Tuan
Teo, Tat Joo
Yeo, Song Huat
Keywords: Compliant Parallel Mechanism
Structure Optimization
Issue Date: 2016
Source: Pham, M. T., Teo, T. J., & Yeo, S. H. (2017). Synthesis of multiple degrees-of-freedom spatial-motion compliant parallel mechanisms with desired stiffness and dynamics characteristics. Precision Engineering, 47, 131-139.
Series/Report no.: Precision Engineering
Abstract: This paper presents a new design method to synthesize multiple degrees-of-freedom (DOF) spatial-motion compliant parallel mechanisms (CPMs). Termed as the beam-based structural optimization approach, a novel curved-and-twisted (C-T) beam configuration is used as the basic design module to optimize the design parameters of the CPMs so as to achieve the targeted stiffness and dynamic characteristics. To derive well-defined fitness (objective) functions for the optimization algorithm, a new analytical approach is introduced to normalize the differences in the units, e.g., N/m or N m/rad, etc., for every component within the stiffness matrix. To evaluate the effectiveness of this design method, it was used to synthesize a 3-DOF spatial-motion (θx − θy − Z) CPM that delivers an optimized stiffness characteristics with a desired natural frequency of 100 Hz. A working prototype was developed and the experimental investigations show that the synthesized 3-DOF CPM can achieved a large workspace of 8°×8°×5.5 mm, high stiffness ratios, i.e., >200 for non-actuating over actuating stiffness, and a measured natural frequency of 84.4 Hz.
URI: https://hdl.handle.net/10356/86688
http://hdl.handle.net/10220/44169
ISSN: 0141-6359
DOI: 10.1016/j.precisioneng.2016.07.014
Rights: © 2016 Elsevier Inc. This is the author created version of a work that has been peer reviewed and accepted for publication by Precision Engineering, Elsevier Inc. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.precisioneng.2016.07.014].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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