A Novel Synthesis Method of Polygon-Scaling Mechanisms

2014 ◽  
Author(s):  
Guochao Bai ◽  
Shimin Wei ◽  
Duanling Li ◽  
Qizheng Liao ◽  
Xianwen Kong
Keyword(s):  
Synthesis Method ◽  
3D Models ◽  
Degree Of Freedom ◽  
Straightforward Manner ◽  
Novel Synthesis

A polygon-scaling mechanism is a single DOF (degree-of-freedom) mechanism for scaling a polygon. This paper presents a tetragon-elements based synthesis method of polygon-scaling mechanisms. According to movable conditions of radial scaling elements, four basic tetragon elements (rhombus element, parallelogram element, kite element and general tetragon element) are proposed. For a given polygon, these four types of elements can be selected based on the characteristics of target polygons to construct polygon-scaling mechanisms in a straightforward manner. Using this synthesis method, some planar 1-DOF scaling mechanisms are obtained with the characteristics of retracting and deploying. Their 3D models are also presented to proof the validity of the proposed method. Finally, a table of tetragon elements with the characteristics of their associated polygon-scaling mechanisms is summarized using which polygon-scaling mechanisms can be easily constructed.

scholarly journals Novel Synthesis Method of Sheet-like Agglomerates β-Bi2O3 with High Photocatalytic Activity

2018 ◽  
Vol 33 (8) ◽  
pp. 919 ◽  
Author(s):  
CHEN Jun ◽  
ZHAN Jing ◽  
DING Feng-Hua ◽  
LI Qi-Hou ◽  
TANG Yi-Wei
Keyword(s):  
Photocatalytic Activity ◽  
Synthesis Method ◽  
High Photocatalytic Activity ◽  
Novel Synthesis

scholarly journals Structural synthesis of plane kinematic chain inversions without detecting isomorphism

2021 ◽  
Vol 12 (2) ◽  
pp. 1061-1071
Author(s):  
Jinxi Chen ◽  
Jiejin Ding ◽  
Weiwei Hong ◽  
Rongjiang Cui
Keyword(s):  
Mechanism Design ◽  
Adjacency Matrix ◽  
Synthesis Method ◽  
Kinematic Chain ◽  
Degree Of Freedom ◽  
Synthesis Methods ◽  
Creative Design ◽  
Structural Synthesis ◽  
Kinematic Chains

Abstract. A plane kinematic chain inversion refers to a plane kinematic chain with one link fixed (assigned as the ground link). In the creative design of mechanisms, it is important to select proper ground links. The structural synthesis of plane kinematic chain inversions is helpful for improving the efficiency of mechanism design. However, the existing structural synthesis methods involve isomorphism detection, which is cumbersome. This paper proposes a simple and efficient structural synthesis method for plane kinematic chain inversions without detecting isomorphism. The fifth power of the adjacency matrix is applied to recognize similar vertices, and non-isomorphic kinematic chain inversions are directly derived according to non-similar vertices. This method is used to automatically synthesize 6-link 1-degree-of-freedom (DOF), 8-link 1-DOF, 8-link 3-DOF, 9-link 2-DOF, 9-link 4-DOF, 10-link 1-DOF, 10-link 3-DOF and 10-link 5-DOF plane kinematic chain inversions. All the synthesis results are consistent with those reported in literature. Our method is also suitable for other kinds of kinematic chains.

Synthesis of multi-input multi-degree-of-freedom fixed shaft gear transmission configuration for vehicles

2021 ◽  
pp. 095440702110652
Author(s):  
Xueliang Li ◽  
Zhihang Wu ◽  
Shujun Yang ◽  
Jibin Hu ◽  
Zengxiong Peng
Keyword(s):  
Electric Vehicles ◽  
Rapid Development ◽  
Synthesis Method ◽  
Theory Model ◽  
Gear Transmission ◽  
Degree Of Freedom ◽  
Speed Ratio ◽  
Multiple Parameters ◽  
Transmission Mechanisms ◽  
Derivation Method

The rapid development of dual-clutch transmission (DCT) and hybrid and purely electric vehicles stimulate the researches on multi-input fixed shaft gear transmission mechanisms. The multiple degree-of-freedom (DOF) transmission mechanism can achieve a wider range of speed ratio adjustment and more modes under certain space and weight constraints, which is an ideal choice for multi gear transmission. In this paper, a synthesis method of fixed shaft gear transmission configuration is proposed. Based on the established graph theory model, kinematic characteristics of the fixed shaft gear transmission configuration are studied and the shift sequence is determined. Using these characteristics, a derivation method from the basic configuration to the comprehensive gears and shafts configuration is proposed. Multiple parameters such as the synchronizer arrangement and speed ratios are optimized. Finally, the proposed method is vigorously verified by a seven-speed DCT with four DOFs. This method is comprehensive and systematic in designing fixed shaft gear transmission configurations, which can be applied to DCT, transmissions for parallel hybrid electric vehicles, and to some novel multi-input transmissions.

A Novel Low Temperature Synthesis Method for Semiconductor Nanowires

2001 ◽  
Vol 676 ◽  
Author(s):  
Shashank Sharma ◽  
Mahendra K. Sunkara ◽  
Raul Miranda ◽  
Guoda Lian ◽  
Elizabeth C. Dickey
Keyword(s):  
Low Temperature ◽  
Synthesis Method ◽  
Nucleation And Growth ◽  
Semiconductor Nanowires ◽  
Nanometer Scale ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Novel Synthesis ◽  
Low Solubility ◽  
Carbon Nanowires

ABSTRACTWe present a novel synthesis technique to grow bulk quantities of semiconductor nanowires at temperatures less than 500 °C. Gallium is used as the liquid medium in a mechanism similar to vapor-liquid-solid (VLS). We demonstrated this low temperature technique with silicon and carbon nanowires. Gallium exhibits extremely low solubility for several elemental semiconductors. This property enables nucleation and growth of nanometer scale wires from large sized gallium droplets (>1 μm) eliminating the need for creation of quantum sized metal droplets.

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