A self-adjusting stiffness center design for large stroke compliant XY nanomanipulators
In the present paper, it is proposed a self-adjusting stiffness center (SASC) design for large stroke XY beam flexure-based mechanisms. An important feature of the SASC lies in it restricts the in-plane parasitic rotation by reducing the moment of force instead of increasing the rotational stiffn...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2018-01-01
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Series: | Mechanical Sciences |
Online Access: | https://www.mech-sci.net/9/41/2018/ms-9-41-2018.pdf |
Summary: | In the present paper, it is proposed a self-adjusting stiffness center (SASC)
design for large stroke XY beam flexure-based mechanisms. An important
feature of the SASC lies in it restricts the in-plane parasitic rotation by
reducing the moment of force instead of increasing the rotational stiffness
widely utilized in the literature. Specifically, it is shown that by
leveraging on the varied stiffness of the parallelogram flexure, the
stiffness center can be made stationary by appropriately setting the relevant
geometric parameters, so that the parasitic rotation can be restricted.
Furthermore, it is presented a millimeter stroke XY nanomanipulator with the
SASC-based redundant constraint in a case study. Numerous finite element
analysis (FEA) results demonstrate that the proposed design is not only
capable of achieving 1.5 × 1.5 mm<sup>2</sup> working range in a compact desktop
size, but significantly reduces the in-plane moment applied to the motion
stage. The proposed SASC-based design provides an alternative approach to
reduce the parasitic rotation of large stroke XY beam flexure-based
mechanisms. |
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ISSN: | 2191-9151 2191-916X |