Compliant linear-rotation motion transduction element based on novel spatial helical flexure hinge

Wang, Rongqi; Zhou, Xiaoqin; Zhu, Zhiwei; Liu, Qiang

doi:10.1016/j.mechmachtheory.2015.06.005

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…One perspective is to merge these models and develop a fully generic description of the CWM behavior. Another perspective concerns the combination of CWM or the addition of other compliant structures to guide the motion to get for instance a pure rotation as in [5] , or to combine sets of flexible beams to suppress infinitesimal motions as envisioned in [23].…”

Section: Discussionmentioning

confidence: 99%

“…In addition, specific motions can be generated with, for instance, helical motion using 3-US mechanism [2,3] or Wren mechanism [4]. One has then the advantage of a parallel structure in terms of stiffness, and at the same time the possibility to adjust the mechanism kinematics for given requirements [5]. The Wren mechanism was studied for deployable and reconfigurable mechanisms [6,7] and it is of particular interest.…”

Section: Introductionmentioning

confidence: 99%

“…First, there is no model for the design of CWM. In [5] a compliant linear-rotation motion transduction element is presented. In [14] a concept for dissipating kinetic energy using arrays of CWM is introduced.…”

Section: Introductionmentioning

confidence: 99%

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Development of models for additively manufactured actuators using compliant Wren mechanism

Rubbert

Schuler

Gayral

et al. 2021

Precision Engineering

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of models for additively manufactured actuators using compliant Wren mechanism

Rubbert

Schuler

Gayral

et al. 2021

Precision Engineering

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show abstract

“…However, the mechanism is complex and the limitation in the rotary angle, suitable for the mechanisms, has the tiny rotary angles. A simple device that converts the linear motion into the rotation in out-of-plane is introduced by Wang et al [8]. The structure combines two disks and flexible beams in a three-dimension model.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation the Compliant Linear-Rotary Mechanism with Thermal Actuator

2020

IJATCSE

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A compliant mechanism to convert linear motion to rotary motion is developed.The means to achieve the linear-to-rotary motion transduction is attributed to an asymmetric arrangement of two linear motion inputs. V-beam thermal actuators provide the linear motion. The device operates with Joule heating effects and the current is applied. Finite element analyses were carried out to predict behaviors of the transduction mechanism. A transduction ratio of nearly 0.5 degrees/mm is achieved. The simulation results also reveal that a more uniform temperature distribution along the thermal actuator allows for a more extended overall thermal expansion and a larger linear motion, which adds to the rotary motion output.

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“…Compared with the right circular hinges, the corner-filleted hinges have larger compliance and lower stress but less rotational precision. In addition to the most common flexure hinges (circular, elliptical and corner-filleted), many other flexure hinges have been designed by researchers, such as V-shaped, 16 parabolic and hyperbolic, 17 and spatial helical 18 flexure hinges.…”

Section: Introductionmentioning

confidence: 99%

Design of flexure hinges based on stress-constrained topology optimization

Liu

Zhang

Fatikow

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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Stress concentration is one of the disadvantages of flexure hinges. It limits the range of motion and reduces the fatigue life of mechanisms. This article designs flexure hinges by using stress-constrained topology optimization. A weighted-sum method is used for converting the multi-objective topology optimization of flexure hinges into a single-objective problem. The objective function is presented by considering the compliance factors of flexure hinges in the desired and other directions. The stress constraint and other constraint conditions are developed. An adaptive normalization of the P-norm of the effective von Mises stresses is adopted to approximate the maximum stress, and a global stress measure is used to control the stress level of flexure hinges. Several numerical examples are performed to indicate the validity of the method. The stress levels of flexure hinges without and with stress constraints are compared. In addition, the effects of mesh refinement and output spring stiffness on the topology results are investigated. The stress constraint effectively eliminates the sharp corners and reduces the stress concentration.

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Compliant linear-rotation motion transduction element based on novel spatial helical flexure hinge

Cited by 14 publications

References 20 publications

Development of models for additively manufactured actuators using compliant Wren mechanism

Development of models for additively manufactured actuators using compliant Wren mechanism

Design and Simulation the Compliant Linear-Rotary Mechanism with Thermal Actuator

Design of flexure hinges based on stress-constrained topology optimization

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