Three-point-support method based on position determination of supports and wafers to eliminate gravity-induced deflection of wafers

2016 ◽  
Vol 46 ◽  
pp. 339-348 ◽  
Author(s):  
Haijun Liu ◽  
Xianglong Zhu ◽  
Renke Kang ◽  
Zhigang Dong ◽  
Xiuyi Chen
Keyword(s):  
Position Determination ◽  
Point Support

The Determination of the Three-Point Support Design of Machine Tool Based on iSIGHT

2014 ◽  
Vol 607 ◽  
pp. 342-345
Author(s):  
Sheng Hui Zhao ◽  
Xiao Chuang Zhu ◽  
Da Wei Zhang
Keyword(s):  
Machine Tool ◽  
High Precision ◽  
Multidisciplinary Optimization ◽  
Joint Surface ◽  
Objective Functions ◽  
Multi Objective Optimization ◽  
Support Design ◽  
Optimal Position ◽  
Point Support

In order to meet the requirements of high-precision machine tool, it has been an important factor to select an appropriate way to support the bed. By building a multidisciplinary optimization (MDO) process based on iSIGHT, this article select the deformation difference of the guides and the deformation difference of the joint surface between column and bed of the machine tool as the objective functions, and then conduct a multi-objective optimization (MOO) of the positional parameters of the three-point support. Eventually the optimization result is given and the optimal position of the three-point support is determined.

Solutions to the Vector Tetrahedron Equation

1965 ◽  
Vol 87 (2) ◽  
pp. 228-234 ◽  
Author(s):  
Milton A. Chace
Keyword(s):  
Closed Form ◽  
Digital Computer ◽  
Three Dimensional ◽  
Dimensional Vector ◽  
Spherical Coordinates ◽  
Tetrahedron Equation ◽  
Position Determination ◽  
Closed Form Solutions

A set of nine closed-form solutions are presented to the single, three-dimensional vector tetrahedron equation, sum of vectors equals zero. The set represents all possible combinations of unknown spherical coordinates among the vectors, assuming the coordinates are functionally independent. Optimum use is made of symmetry. The solutions are interpretable and can be evaluated reliably by digital computer in milliseconds. They have been successfully applied to position determination of many three-dimensional mechanisms.

Automated Determination of the Position of Ships by Satellites

1967 ◽  
Vol 20 (03) ◽  
pp. 281-285
Author(s):  
H. C. Freiesleben
Keyword(s):  
Celestial Body ◽  
World Wide ◽  
Artificial Satellites ◽  
Radio Waves ◽  
The Moon ◽  
Position Determination ◽  
The Earth ◽  
Navigational Aids ◽  
Automated Determination

It has recently been suggested that 24-hour satellites might be used as navigational aids. To what category of position determination aids should these be assigned ? Is a satellite of this kind as it were a landmark, because, at least in theory, it remains fixed over the same point on the Earth's surface, in which case it should be classified under land-based navigation aids ? Is it a celestial body, although only one tenth as far from the Earth as the Moon ? If so, it is an astronomical navigation aid. Or is it a radio aid ? After all, its use for position determination depends on radio waves. In this paper I shall favour this last view. For automation is most feasible when an object of observation can be manipulated. This is easiest with radio aids, but it is, of course, impossible with natural stars.At present artificial satellites have the advantage over all other radio aids of world-wide coverage.

6D-Measurement System for the Position Determination of a Robot End-Effector

Fringe 2013 ◽  
2014 ◽  
pp. 531-534 ◽  
Author(s):  
Alexej Janz ◽  
Christian Pape ◽  
Eduard Reithmeier
Keyword(s):  
Measurement System ◽  
End Effector ◽  
Position Determination

Research on Locking Position Determination of Space-arm Based on Modal Analysis

2014 ◽  
Vol 13 (15) ◽  
pp. 2437-2441
Author(s):  
Binghui Wu ◽  
Jianjun Xi
Keyword(s):  
Modal Analysis ◽  
Position Determination

A novel linear Sagnac interferometer in position determination of perturbations

2014 ◽  
Author(s):  
Shaohua Pi ◽  
Bingjie Wang ◽  
Jiang Zhao ◽  
Guangwei Hong ◽  
Dong Zhao ◽  
...  
Keyword(s):  
Sagnac Interferometer ◽  
Position Determination
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