Results 241 to 250 of about 363,653 (297)

Geometric Error Modeling of a Vertical Machining Center

Advanced Materials Research, 2013
The effect of geometric error on machining accuracy was researched by multi-body system theory, as well as homogeneous coordinate transformation method. Taking a vertical machining center as example, topological structure of the machine tool was described by lower body array.
Gui Qiang Liang, Jun Xian Zhang, Fei Fei Zhao   +2 more
openaire   +1 more source

Geometrical Error Modeling and Compensation Using Neural Networks

IEEE Transactions on Systems, Man and Cybernetics, Part C (Applications and Reviews), 2006
This paper describes an approach based on neural networks (NNs) for geometrical error modeling and compensation for precision motion systems. A laser interferometer is used to obtain the systematic error measurements of the geometrical errors, based on which an error model may be constructed and, consequently, a model-based compensation may be ...
Tan, K.K., Huang, S.N., Lim, S.Y., Leow, Y.P., Liaw, H.C.   +4 more
openaire   +1 more source

Sensitivity analysis of geometric errors in additive manufacturing medical models

Medical Engineering & Physics, 2015
Additive manufacturing (AM) models are used in medical applications for surgical planning, prosthesis design and teaching. For these applications, the accuracy of the AM models is essential. Unfortunately, this accuracy is compromised due to errors introduced by each of the building steps: image acquisition, segmentation, triangulation, printing and ...
Pinto, José Miguel, Arrieta, Cristóbal, Andía Kohnenkampf, Marcelo Edgardo, Uribe Arancibia, Sergio A., Ramos Grez, Jorge, Vargas Díaz, Alex Patricio, Irarrázaval Mena, Pablo, Tejos Núñez, Cristián Andrés   +7 more
openaire   +3 more sources

A geometric model for initial orientation errors in pigeon navigation

Journal of Theoretical Biology, 2011
All mobile animals respond to gradients in signals in their environment, such as light, sound, odours and magnetic and electric fields, but it remains controversial how they might use these signals to navigate over long distances. The Earth's surface is essentially two-dimensional, so two stimuli are needed to act as coordinates for navigation. However,
Claire M, Postlethwaite, Michael M, Walker   +1 more
openaire   +2 more sources

Geometrical model to drive vision systems with error propagation

ICARCV 2004 8th Control, Automation, Robotics and Vision Conference, 2004., 2005
Localization with respect to a reference model is a key feature for mobile robots. Urban environment offers numerous landmarks that can be used for the localization process. This paper deals with the use of an environment model stored in a geographic information system, to drive a vision system i.e.
M. Kais, S. Morin, A. De La Fortelle, C. Laugier   +3 more
openaire   +1 more source

4-Axis Machine Tool Geometric Error Modeling and Measurement

Applied Mechanics and Materials, 2012
To improve the machining precision and reduce the geometric errors for 4-axis machine tool, multi-body system theory is introduced . Based on of the theory, ,through analysing the matrix of the position transformation and the displacement transformation, a model for the machine tool is put forth.
Fang Yu Pan, Ming Li, Chang Kai Xu
openaire   +1 more source