scholarly journals Dimensional Parameters Design for Flexible Cable Drive Parallel Mechanism

2020 ◽  
Vol 1635 ◽  
pp. 012039
Author(s):  
Hongbo Liao ◽  
Kun Liu ◽  
Xinyi Zhang ◽  
Zhongkai Chen ◽  
Kun Yin
Keyword(s):  
Parallel Mechanism ◽  
Flexible Cable ◽  
Cable Drive ◽  
Dimensional Parameters

Dynamic Analysis on Flexible Cable-Driven Parallel Mechanism

2014 ◽  
Vol 1006-1007 ◽  
pp. 298-303
Author(s):  
Qing Lin Chen ◽  
Qi Lin
Keyword(s):  
Linear Programming ◽  
Dynamic Analysis ◽  
Parallel Mechanism ◽  
Sudden Change ◽  
Programming Method ◽  
New Method ◽  
Linear Programming Method ◽  
Flexible Cable

The interference between cables and surface of acutator limits the movement in the cable-driven parallel mechanism. The mechanism with fixed hinge can’t absolutely avoid the interference point of the track when using linear programming method. One new method, named as distant interference, was proposed to pick out all the interferential points of the track. Based on the principle of symmetrical force, the alteration to position of the six fixed hinges and two extensive hinges eliminated the interference. Through the simulation of combined spiral movement, the workspace of the flexible cable-driven parallel mechanism is larger than that of the mechanism with fixed hinge and reduce the interferece of long and big track. Compared with the original mechanism, the value of cables force in the flexible cable-driven parallel mechanism is smooth, continous and no sudden change.

Analysis about the Work Space of a 3-RPR Parallel Mechanism Based Wind Tunnel Experiment Platform

2015 ◽  
Vol 741 ◽  
pp. 646-650
Author(s):  
Yong Jin Hu ◽  
Wen Jia Chen ◽  
Lu Yang Li ◽  
Jian Zhang ◽  
Zi Yan Shao
Keyword(s):  
Wind Tunnel ◽  
Parallel Mechanism ◽  
Wind Tunnel Test ◽  
Wind Tunnel Experiment ◽  
Work Space ◽  
Experiment Platform ◽  
Test Platform ◽  
Dimensional Parameters ◽  
Position Solution ◽  
The Impact

This paper introduces the characteristics of a 3-RPR parallel mechanism based on the wind tunnel experiment platform, makes use of the constraint condition of the inverse position solution of the structure, and uses MATLAB software to draw images of their work space and analyze the impact of the dimensional parameters of wind tunnel platform on the scope of work space, and it provides a theoretical basis for the design and practical of wind tunnel test platform.

Conceptual Design and Dimensional Synthesis of a Reconfigurable Hybrid Robot

2004 ◽  
Vol 127 (3) ◽  
pp. 647-653 ◽  
Author(s):  
Meng Li ◽  
Tian Huang ◽  
Dawei Zhang ◽  
Xueman Zhao ◽  
S. Jack Hu ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Parallel Mechanism ◽  
Two Dimensional ◽  
Dimensional Synthesis ◽  
One Dimensional ◽  
Reconfigurable Robots ◽  
Fixed Base ◽  
Dimensional Version ◽  
Dimensional Parameters ◽  
Moving Platform

This paper deals with the conceptual design of a novel four-degree-of-freedom (dof) modularized robot which is composed of a 2-dof parallel mechanism plus a 2-dof rotating head attached to the moving platform. Patented with the name Bicept, the robot is the two-dimensional version of the Tricept robot and is designed as a reconfigurable module that can readily be integrated with 1-dof feed mechanism or a fixed base in order to form a set of reconfigurable robots with parallel-serial architecture. The dimensional synthesis of the 2-dof parallel mechanism as a component of the Bicept robot is also carried out by solving a one-dimensional nonlinear equation associated with the strut-length constraint. The dimensional parameters corresponding to various width-height ratios of the work space are obtained via examples.

A Workspace Characterization of the 3-RRR Planar Parallel Mechanism

2014 ◽  
Vol 658 ◽  
pp. 563-568 ◽  
Author(s):  
Florentin Buium ◽  
Dumitru Leohchi ◽  
Ioan Doroftei
Keyword(s):  
Parallel Mechanism ◽  
Parallel Robot ◽  
Singular Configurations ◽  
Dimensional Parameters

The paper deals with a workspace problem of the 3 RRR planar parallel mechanism, used as parallel robot structure. Depending on the dimensional parameters and constructive characteristics, the authors search to depict the shape and particularities of the mechanism workspace of a 3 RRR planar parallel mechanism. This characterization of the mechanism workspace depending on the dimensional parameters can be usefull in mechanism designing accorded to some functional particularities and also can help in avoiding singular configurations.

Dimensional Synthesis of a Planar Parallel Mechanism for Wafer Transfer with Kinematics Performance

2012 ◽  
Vol 252 ◽  
pp. 107-110
Author(s):  
Yan Bing Ni ◽  
Wen Xia Guo ◽  
Fa Yang Luo
Keyword(s):  
Performance Index ◽  
Parallel Mechanism ◽  
Jacobian Matrix ◽  
Mean Value ◽  
Evaluation Criterion ◽  
Dimensional Synthesis ◽  
Dimensional Parameters ◽  
The Mean ◽  
The Relationship ◽  
Conditioning Number

This paper deals with the dimensional synthesis of a planar parallel mechanism for wafer transfer with kinematics performance. Under the relationship between workspace and parametric, a kinematics performance index, which is composed of the conditioning number of the Jacobian matrix and the motion resolution, is considered as the evaluation criterion. And a new index which is proposed by considering both the mean value and fluctuation of the pre-mentioned index is used to optimally design the dimensional parameters. It is testified that the optimal dimensional parameters can satisfied with the kinematics performance.

Effects of anchor wedge dimensional parameters on posttensioning strand performance

PCI Journal ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 63-83 ◽  
Author(s):  
Kevin Q. Walsh ◽  
Randy L. Draginis ◽  
Richard M. Estes ◽  
Yahya C. Kurama
Keyword(s):  
Dimensional Parameters

On the Origin of Four Pi in Physics

2016 ◽  
pp. 3994-4013
Author(s):  
Aaron Hanken
Keyword(s):  
Black Hole ◽  
Surface Area ◽  
Single Particles ◽  
Pythagorean Triples ◽  
Free Particles ◽  
Close Relationship ◽  
Dimensional Parameters ◽  
Gaussian Surface ◽  
Planck Energy ◽  
The Universe

We find the highest symmetry between the fields intrinsic to free particles (free particles having only mass, charge and spin), and show these fields symmetries and their close relationship to force and entropy. The Boltzmann Constant is equal to the natural entropy, in that it is The Planck Energy over The Planck Temperature. This completes a needed symmetry in The Bekenstein-Hawking Entropy. Upon substitution of Planck Units into The Schwarzschild Radius, we find that the mass and radius of any black hole define both the gravitational constant and the natural force. We find that the Gaussian Surface area about a particle is equal to the surface area of an equally massed black hole if we define the gravitational field of that particle to be the quotient of The Planck Force and the particles mass. By these simple substitutions we find that gravity is quantized in units of surface entropy. We also find Pythagorean Triples are resting within the dimensional parameters of Special Relativity, and show this to be the dimensional aspects of single particles observing one another, coupled with the intrinsic Hubble nature of the universe.

Physical modeling and deformation simulation of flexible cable under the plane constraint

2017 ◽  
Vol 50 (4-6) ◽  
pp. 471-484
Author(s):  
Hongwang DU ◽  
Wei XIONG ◽  
Haitao WANG ◽  
Zuwen WANG
Keyword(s):  
Physical Modeling ◽  
Flexible Cable ◽  
Deformation Simulation
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