Optimization and Performance Improvement of Multi-excitation Double-stator Flux-switching Machine

2018 ◽  
Author(s):  
Chen Yunyun ◽  
Ding Yu ◽  
Zhuang Jiahong ◽  
Li Xijing ◽  
Liu Fangjie
Keyword(s):  
Performance Improvement ◽  
And Performance ◽  
Stator Flux ◽  
Optimization And Performance

Influence of Thermal Wires Position on Fluidic Gyroscope with Different Cavities

2012 ◽  
Vol 268-270 ◽  
pp. 1562-1565
Author(s):  
Bao Li Zhang ◽  
Lin Hua Piao ◽  
Jin Tang ◽  
Chuan Zhi Mei
Keyword(s):  
Performance Improvement ◽  
Flow Distribution ◽  
Structure Optimization ◽  
Rectangular Cavity ◽  
Velocity Difference ◽  
Instructional Role ◽  
Two Dimensional Flow ◽  
Center Axis ◽  
And Performance ◽  
Optimization And Performance

The influence of thermal wires position on resolution of fluidic gyroscope with three different cavities was researched. Using Finite element method we calculated two-dimensional flow distribution of fluidic gyroscope with rectangular cavity and two streamlined cavities when the thermal wires are in different positions. As the results shown: define d is the distance between thermal wires and the nozzle along the fluidic beam propagation direction, when d ≥ 13mm, velocity 4SSUM in streamlined cavity 1 is bigger than velocity 2SSUM in streamlined cavity 2. When d >16mm, velocity SX of two streamlined cavities decrease faster than RX of rectangular cavity, which reduce the vortex phenomena in cavity. With the distance away from the center axis of cavity increases, the velocity gradient increases, and increasing the distance between two thermal wires within a certain range can increase velocity difference of two when angular velocity ωi inputs, temperature difference increases, so it increases the resolution of fluidic gyroscopes. This paper has an instructional role on structure optimization and performance improvement of fluidic gyroscopes.

Performance Calculation and Test Analysis of PDM Lining with Super-Elastic Constitutive Model

2013 ◽  
Vol 307 ◽  
pp. 139-143
Author(s):  
Jia Lin Tian ◽  
Rong Ming Hao ◽  
Lin Yang ◽  
Xin Wang ◽  
Zhe Fan ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Rotation Speed ◽  
Performance Comparison ◽  
Test Analysis ◽  
Material Parameters ◽  
Overall Efficiency ◽  
And Performance ◽  
Performance Calculation ◽  
Two Parameter ◽  
Optimization And Performance

Based on performance comparison of PDM equidistant and conventional elastomer lining, the impacts on the PDM performance were presented with different equidistant lining thickness. According to the Mooney-Rivlin two-parameter model and the Poisson radio equaling to 0.5, the elastomer is incompressible during the calculation and its relational material parameters such as elastic modulus and shear modulus were determined. The PDM stator and rotor curve equations were established according to hypocycloid theory. The lobe configuration is 3:4, the performance comparisons were investigated including deformation and Mises stress between conventional and equidistant elastomer lining of PDM with contact model. The test data pointed out torque, rotation speed, volumetric and overall efficiency variation results with the motor pressure difference changing from 1.93MPa to 5.90MPa. The presented results could be used for PDM design optimization and performance improvement.

scholarly journals NUMERICAL MODELING OF A PRECISE DUAL AXIS POSITIONING SYSTEM / DVIEJŲ AŠIŲ PRECIZINIO POZICIONAVIMO SISTEMOS SKAITINIS MODELIAVIMAS

2012 ◽  
Vol 3 (6) ◽  
pp. 79-81 ◽  
Author(s):  
Giedrius Augustinavičius ◽  
Audrius Čereška
Keyword(s):  
Performance Improvement ◽  
Positioning System ◽  
Reduction Mechanism ◽  
Element Analysis ◽  
And Performance ◽  
Analytical Approaches ◽  
The Mathematical Model ◽  
Architecture Optimization ◽  
Fine Adjustment ◽  
Optimization And Performance

This paper presents a model of a precise dual axis flexure-based positioning system for micro-positioning uses. The positioning system is featured with monolithic architecture, flexure-based joints and ultra fine adjustment screws. Its workspace has been evaluated via analytical approaches. Reduction mechanism is optimally designed. The mathematical model of the positioning system has been derived and verified by resorting to finite element analysis (FEA). The established analytical and (FEA) models are helpful for reliable architecture optimization and performance improvement in the positioning system. Santrauka Straipsnyje pristatomas dviejų ašių precizinio pozicionavimo sistemos su tampriaisiais elementais modeliavimas. Pozicionavimo sistemą sudaro monolitinė struktūra ir sraigtinės poros. Matematinis modelis sudarytas platformų poslinkiams apskaičiuoti. Pasiūlyta modeliavimo metodika gali būti taikoma kuriant pozicionavimo sistemas su tampriaisiais elementais.

scholarly journals Passivation optimization and performance improvement of planar a-Si:H/c-Si heterojunction cells in perovskite/silicon tandem solar cells

2019 ◽  
Vol 68 (2) ◽  
pp. 028101 ◽  
Author(s):  
Jun-Fan Chen ◽  
Hui-Zhi Ren ◽  
Fu-Hua Hou ◽  
Zhong-Xin Zhou ◽  
Qian-Shang Ren ◽  
...  
Keyword(s):  
Solar Cells ◽  
Performance Improvement ◽  
Tandem Solar Cells ◽  
And Performance ◽  
Optimization And Performance
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