Multi-objective Fuzzy Reliability Optimization of Worm Gear Mechanism

2009 ◽  
Author(s):  
Zhao Hui
Keyword(s):  
Worm Gear ◽  
Reliability Optimization ◽  
Fuzzy Reliability ◽  
Multi Objective ◽  
Gear Mechanism

A method to solve fuzzy reliability optimization problem

1995 ◽  
Vol 35 (2) ◽  
pp. 171-181 ◽  
Author(s):  
Lev V. Utkin ◽  
Sergey V. Gurov ◽  
Igor B. Shubinsky
Keyword(s):  
Optimization Problem ◽  
Reliability Optimization ◽  
Fuzzy Reliability

scholarly journals High Performance Rotary Table for Machine Tool Applications

2009 ◽  
Vol 3 (3) ◽  
pp. 343-347 ◽  
Author(s):  
K. M. Muditha Dassanayake ◽  
◽  
Masaomi Tsutsumi ◽  
Keyword(s):  
Machine Tool ◽  
Frequency Response ◽  
High Performance ◽  
Worm Gear ◽  
Rotary Table ◽  
Positioning Accuracy ◽  
Roller Drive ◽  
Gear Mechanism ◽  
Accuracy And Repeatability

The high performance rotary tables are immense necessary part for the multi-axis machines. These rotary tables are yet in the developing stage. In this report, a rotary table driven by roller drive is introduced and the characteristics of that are discussed by comparing them with the characteristics of rotary table driven by worm gear mechanism. As the characteristics, the positioning accuracy and repeatability, frequency response, rotational fluctuations and influence of unbalance mass on motion are measured. According to the measured results, it can be said that the rotary table driven by roller drive shows high performances and therefore it can be said that this type of rotary tables are well suited for machine tool applications.

Fuzzy Reliability Optimization Design Method of Flange Based on the Tightness of Bolted Flanged Connections

2010 ◽  
Vol 37-38 ◽  
pp. 501-504
Author(s):  
Zhen Guo Sun ◽  
Bo Qin Gu ◽  
Xing Lu Huang
Keyword(s):  
Probability Theory ◽  
Optimization Design ◽  
Design Method ◽  
Design Parameters ◽  
Reliability Optimization ◽  
Fuzzy Reliability ◽  
Leakage Model ◽  
Sealing Performance ◽  
Random Probability ◽  
Fuzzy Random

Based on the time-correlated leakage model and fuzzy random probability theory, a formula for calculating fuzzy random reliability of sealing performance of bolted flanged connections was derived. The optimization variables were defined according to the sensitivity analysis of design parameters on fuzzy reliability of sealing performance. A fuzzy reliability optimization design method of flange was investigated, in which both the tightness of bolted flanged connections and the strength of flange were taken into consideration. As an example, an integral welding necked pipe flange was designed according to the optimization design method proposed in this paper. The designed flange not only satisfies the requirements of flange strength and sealing reliability of connections, but also its weight is reduced by 16% compared with that prescribed in the standard.

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