A novel kinematic accuracy analysis method for a mechanical assembly based on DP-SDT theory

2017 ◽  
Vol 94 (9-12) ◽  
pp. 4301-4315 ◽  
Author(s):  
Xuan Zhou ◽  
Hai Li ◽  
Haiping Zhu
Keyword(s):  
Accuracy Analysis ◽  
Analysis Method ◽  
Mechanical Assembly ◽  
Kinematic Accuracy

An accuracy analysis method for first-order reliability method

2018 ◽  
Vol 233 (12) ◽  
pp. 4319-4327 ◽  
Author(s):  
Zhenzhong Chen ◽  
Zihao Wu ◽  
Xiaoke Li ◽  
Ge Chen ◽  
Guangfeng Chen ◽  
...  
Keyword(s):  
Structural Reliability ◽  
Nonlinear Problems ◽  
Accuracy Analysis ◽  
Analysis Method ◽  
First Order Reliability Method ◽  
First Order ◽  
Reliability Level ◽  
Reliability Method ◽  
Value Range ◽  
Crashworthiness Design

The first-order reliability method is widely used for structural reliability analysis; however, its accuracy would become worse for nonlinear problems. This paper proposes the accuracy analysis method of the first-order reliability method, which considers the worst cases when using the first-order reliability method and gives the possible value range of the probability of safety. The accuracy analysis method can evaluate the reliability level of the first-order reliability method when the failure surfaces are nonlinear. The calculation formula for the possible value range of the probability of safety is proposed, and its trend as the dimensions and reliability rise is also discussed in this paper. A numerical example and a honeycomb crashworthiness design are presented to validate the accuracy of the first-order reliability method, and the results show that they are located within the possible value range proposed in this paper.

Analysis of the Robotic Assembling Accuracy Based on Virtual Assembly Environment

2001 ◽  
Author(s):  
Zheng Zhang ◽  
Xuebuo Luo ◽  
Cunxi Xie
Keyword(s):  
Physical Modeling ◽  
Virtual Assembly ◽  
Behavioral Modeling ◽  
Accuracy Analysis ◽  
Error Source ◽  
Mechanical Assembly ◽  
Graphical Environment ◽  
Assembly Unit ◽  
High Flexibility ◽  
D Model

Abstract Multi-degree freedom robots have many advantages including agility, heavy-loading capability and high flexibility. They play a very important role in mechanical assembly. Due to the complexity of their spatial pose, the robot assembling accuracy analysis should not be confined to the 2-D plane. This paper applies the accuracy analysis to the virtual environment by constructing accurate models of robot assembly unit such as 3-D geometrical modeling, physical modeling, and behavioral modeling. Using the interactive and 3-D graphical environment to observe and evaluate the effects of assembling process. By operating the virtual 3-D model of the robot assembly unit and simulating the assembling process in the virtual assembly environment, the influence of errors in assembly can be analyzed and the statistical value of errors can be obtained. This paper also presents the method of visualization in analyzing the robot assembling accuracy, and studies the influence of spatial pose of robot assembly on the axis-hole assembly success rate, especially the robot teaching accuracy. Through the integration of the various errors and on the basis of the assembling accuracy, the tolerance of error source can be reasonably distributed to meet the requirement for assembling accuracy, and the planning of robot assembly unit can be improved.

Kinematic accuracy analysis of robot based on local POE

2017 ◽  
Author(s):  
Wang Sheng ◽  
Shen Jingjin ◽  
Xu Fengyu ◽  
Jiang Guoping
Keyword(s):  
Accuracy Analysis ◽  
Kinematic Accuracy

scholarly journals Feature Based Machine Tool Accuracy Analysis Method

Procedia CIRP ◽  
2015 ◽  
Vol 27 ◽  
pp. 216-222 ◽  
Author(s):  
Hai Li ◽  
Yingguang Li ◽  
Wei Wang
Keyword(s):  
Machine Tool ◽  
Accuracy Analysis ◽  
Analysis Method ◽  
Machine Tool Accuracy ◽  
Feature Based
Sign in / Sign up

Export Citation Format

Share Document