Results 31 to 40 of about 761,718 (286)
Journal of Manufacturing and Materials Processing, 2018 An S-shaped machining test is proposed for the ISO 10791-7 standard to verify the performance of five-axis machining centers. However, investigation of the factor that has the most influence on the geometrical accuracy of finished S-shaped workpieces has
Ryuta Sato +2 more
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Calibration of Nanopositioning Stages
Micromachines, 2015 Accuracy is one of the most important criteria for the performance evaluation of micro- and nanorobots or systems. Nanopositioning stages are used to achieve the high positioning resolution and accuracy for a wide and growing scope of applications ...
Ning Tan +2 more
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Error bounds in stochastic-geometric normal approximation [PDF]
Discrete Mathematics & Theoretical Computer Science, 2008 We provide normal approximation error bounds for sums of the form $\sum_x \xi_x$, indexed by the points $x$ of a Poisson process (not necessarily homogeneous) in the unit $d$-cube, with each term $\xi_x$ determined by the configuration of Poisson points ...
Mathew Penrose, Tom Rosoman
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Revista Facultad de Ingeniería Universidad de Antioquia, 2019 In this article two complementary methods are developed. Firstly, a method to add precision in large machine tools with modular lightweight structures (APLM), which performs the compensation of geometrics and dynamics errors using embedded intelligence,
Orlando de Jesús Copete-Murillo +1 more
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IEEE Access, 2021 Till now, most calibration methods only compensate geometric error caused by inaccurate kinematic parameters, while the desired accuracy may still not be achieved when the robot is performing long-stroke, heavy-duty loading and unloading tasks.
Hongyu Wan +6 more
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Finite Element Error Estimates on Geometrically Perturbed Domains [PDF]
Journal of Scientific Computing, 2020 AbstractWe develop error estimates for the finite element approximation of elliptic partial differential equations on perturbed domains, i.e. when the computational domain does not match the real geometry. The result shows that the error related to the domain can be a dominating factor in the finite element discretization error.
Piotr Minakowski, Thomas Richter
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Generation of curved high-order meshes with optimal quality and geometric accuracy [PDF]
, 2016 We present a novel methodology to generate curved high-order meshes featuring optimal mesh quality and geometric accuracy. The proposed technique combines a distortion measure and a geometric L2-disparity measure into a single objective function.
Roca Navarro, Francisco Javier +2 more
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Advances in Mechanical Engineering, 2021 Aiming at the problem that the geometric accuracy design index of machine tools is difficult to be determined reasonably in the geometric precision design process of CNC machine tools, this paper presents a mapping model between geometric tolerance of ...
Zixin Lin +4 more
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Group approximation in Cayley topology and coarse geometry, Part III: Geometric property (T) [PDF]
, 2014 In this series of papers, we study correspondence between the following: (1) large scale structure of the metric space bigsqcup_m {Cay(G(m))} consisting of Cayley graphs of finite groups with k generators; (2) structure of groups which appear in the ...
Mimura, Masato +3 more
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Rapid Measurement and Identification Method for the Geometric Errors of CNC Machine Tools
Applied Sciences, 2019 Error compensation technology offers a significant means for improving the geometric accuracy of CNC machine tools (MTs) as well as extending their service life. Measurement and identification are important prerequisites for error compensation.
Xinghua Li +8 more
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