scholarly journals Algorithm for a high precision contactless measurement system

ACTA IMEKO ◽  
2014 ◽  
Vol 2 (2) ◽  
pp. 3 ◽  
Author(s):  
Trung Tran Nguyen ◽  
Arvid Amthor ◽  
Christoph Ament
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Robot Manipulator ◽  
Calibration Method ◽  
The Self ◽  
Contactless Measurement ◽  
Optimal Arrangement ◽  
Self Calibration ◽  
Tool Centre Point ◽  
Laser Trackers

This paper presents a Monte Carlo simulation of the self-calibration method for the multi laser tracker system (MLTS) which can track a retroreflector mounted on a kinematical system (e.g. positioning stage, robot manipulator etc.). Four laser trackers build up the MLTS. In the first part of the study the required algorithms enabling the MLTS to measure the position of the retroreflector are presented. The algorithms include the localization of the retroreflector, the communication between the laser trackers and the tracking controller as well as the calculation of the Tool Centre Point (TCP) position. In the second part of this study a deeper analysis of the self-calibration algorithm is carried out. A Monte Carlo simulation shows that the quality of the parameter estimation highly depends on the optimal arrangement of the MTLS.

Computer Simulation of Self-Assembly of Disc-Shaped Nanoparticles

2013 ◽  
Vol 710 ◽  
pp. 716-719
Author(s):  
Bo Du ◽  
Zi Lu Wang ◽  
Xue Hao He
Keyword(s):  
Computer Simulation ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Simulated Annealing ◽  
Formation Mechanism ◽  
Self Assembly ◽  
Nematic Phase ◽  
The Self ◽  
Isotropic Phase ◽  
Shaped Nanoparticles

Understanding how nanoparticles self-assemble into specific structures is important in biology. The self-assembly structures of disc-shaped nanoparticles are investigated using Gay Berne potential. Through the simulated annealing Monte Carlo simulation underNVTcondition, we found that various nanostructures such as nematic phase and isotropic phase are discovered. The formation mechanism of these novel nanostructures is discussed.

The self-calibration method of IR mixer with low IF

2008 ◽  
Vol 55 (2) ◽  
pp. 115-124
Author(s):  
Andrzej Szymański ◽  
Ewa Kurjata-Pfitzner ◽  
Jan Lesiński ◽  
Jerzy Wąsowski
Keyword(s):  
Calibration Method ◽  
The Self ◽  
Self Calibration

scholarly journals Stepwise study on Janus-like particles fabricated by polymeric mixtures within soft droplets: a Monte Carlo simulation

RSC Advances ◽  
2017 ◽  
Vol 7 (61) ◽  
pp. 38666-38676 ◽  
Author(s):  
Yuping Sheng ◽  
Li Xia ◽  
Guanzhou Yang ◽  
Yiqing Xia ◽  
Yong Huang ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Self Assembly ◽  
The Self ◽  
Janus Particles ◽  
Polymer Mixtures ◽  
Assembly Behavior

Janus particles were fabricated using different polymer mixtures and the self-assembly behavior for different particles was compared.

Self-Calibration of Coupling Error for 3-DOF Displacement Measurement of Planar Working Stage Based on Two Planar Gratings

2017 ◽  
Vol 870 ◽  
pp. 135-140
Author(s):  
Yong Meng Liu ◽  
Ze Lin Li ◽  
De Hao Du ◽  
Mao Qiang Yuan ◽  
Jing Zhi Huang ◽  
...  
Keyword(s):  
Fourier Series ◽  
Calibration Method ◽  
Systematic Errors ◽  
Displacement Measurement ◽  
The Self ◽  
Experimental Results ◽  
Positioning Accuracy ◽  
Self Calibration ◽  
Coupling Error

A self-calibration method of coupling error is presented for 3-DOF displacement measurement of a planar moving stage based on two planar gratings. The self-calibration method using Fourier series is developed to extract the periodic systematic errors from the coupling errors. The extracted periodic systematic errors are compensated. Experiments are conducted to validate the validity of the self-calibration method and experimental results indicate that the coupling errors in x and y directions are reduced by 2 and 1.5 times respectively. It can be therefore concluded that the self-calibration method is suitable for the 3-DOF displacement measurement of a planar moving stage to improve the positioning accuracy.

Reliability Analysis of a Robot Manipulator Operation Employing Single Monte-Carlo Simulation

2006 ◽  
Vol 321-323 ◽  
pp. 1568-1571 ◽  
Author(s):  
Dong Hwan Choi ◽  
Hong Hee Yoo
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Reliability Analysis ◽  
Robot Manipulator ◽  
Computing Time ◽  
Manufacturing Cost ◽  
Robot System ◽  
Performance Requirement ◽  
Manufacturing Tolerance ◽  
Design Engineers

The operation error of a robot that occurs inevitably due to the manufacturing tolerance needs to be controlled within a certain range to achieve proper performance of the robot system. The reduction of manufacturing tolerance, however, increases the manufacturing cost in return. Therefore, design engineers try to solve the problem of maximizing the tolerance to reduce the manufacturing cost while minimizing the operation error to satisfy the performance requirement. In the present study, a revolute joint model considering uncertainties due to joint clearance is employed to perform a reliability analysis of the robot manipulator operation. The reliability analysis procedure employs single Monte-Carlo simulation and a statistical relation between the tolerance and the operation error. Significant reduction of computing time can be achieved with the proposed method. The present method is especially effective if sensitivity information is hard to be obtained for the analysis.

Monte Carlo Simulation of Diffusion with Uniform Sinks and Sources for Vacancies

2005 ◽  
Vol 237-240 ◽  
pp. 1168-1173 ◽  
Author(s):  
Jaroslav Ženíšek ◽  
Jiří Svoboda ◽  
Franz Dieter Fischer
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Monte Carlo Model ◽  
Kirkendall Effect ◽  
The Self ◽  
The Other ◽  
Other Hand ◽  
Self Consistent

A new concept of generation and annihilation of vacancies at uniform sinks and sources for vacancies is incorporated into the standard Monte Carlo model for vacancy mediated diffusion. This model enables to treat the vacancy wind as well as the deformation of the specimen and the shift of the Kirkendall plane. The Monte Carlo model is used for the testing of the recent phenomenological theories of diffusion by Darken, Manning and Moleko. The agreement with the self-consistent Moleko theory is excellent. On the other hand the agreement with the classical Darken theory used very often for the explanation of the Kirkendall effect is rather poor.

Sign in / Sign up

Export Citation Format

Share Document