Results 211 to 220 of about 10,460,767 (272)
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Thermal-Awareness in a Soft Error Tolerant Architecture
2019 Design, Automation & Test in Europe Conference & Exhibition (DATE), 2019It is crucial to provide soft error reliability in a power-efficient manner such that the maximum chip temperature remains within the safe operating limits. Different execution phases of an application have diverse performance, power, temperature and vulnerability behavior that can be leveraged to fulfill the resiliency requirements within the allowed ...
Sajjad Hussain +2 more
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Machine Tool Thermal Error Reduction—an Appraisal
Proceedings of the I MECH E Part B Journal of Engineering Manufacture, 1999It has been shown that machine tool thermal distortion can account for 75 per cent of the total machining error. As a result there has been a great deal of interest in techniques for reducing thermal errors. The approaches taken to thermal error reduction can be divided into two broad categories of reducing structural temperature change and reducing ...
S R Postlethwaite, J P Allen, D G Ford
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A Combined Error Model for Thermal Error Compensation of Machine Tools
Advanced Materials Research, 2013In this paper, a combined error model for thermal error compensation of machine tools is presented. Through the analysis of thermal error data of machine spindle at different temperatures, the error variation law is obtained. Experiments on the axial directional spindle deformation on a CNC machine center are conducted to build and validate the ...
Wei Wang, Jian Guo Yang
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Thermal error analysis and error prediction modeling on a machine tool
2008 IEEE International Conference on Industrial Engineering and Engineering Management, 2008Thermal errors are the largest contributor to the dimensional errors of a workpiece in precision machining. It is very significant to study how to accurately simulate the spindle thermal errors. In this paper a novel concept of thermal error modes analysis is proposed to develop a better understanding of the thermal deformation on a machine tool.
null Zhu Rui +4 more
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Error Analysis of Thermal Response Tests
Applied Energy, 2013Abstract The ground thermal conductivity and borehole thermal resistance are essential parameters for the design of a ground source heat pump system. As it is hardly possible to obtain sufficiently accurate values of these parameters from geological or soil-profile information, thermal response tests have been developed that provide measurements in ...
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Recent Patents of Thermal Error Modeling and Thermal Error Prediction of CNC Machine Tool Spindle
Recent Patents on Engineering: With the development of machine tools to high precision and high automation, thermal error has become the key reason to hinder the improvement of thermal stability of machine tools. The spindle electrothermal error is an important factor affecting the machining accuracy of highspeed CNC machine tools.
Zhaolong Li, Benchao Sun
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Autonomously triggered model updates for self-learning thermal error compensation
, 2021The presented method significantly increases the self-optimization ability of thermal error compensation models by triggering on-machine measurements when unknown thermal conditions occur.
Nico Zimmermann +3 more
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Thermal Error Modelling in CNC Machines
Applied Mechanics and Materials, 2014Latest trend in increasing the performance characteristics of precision machines is reducing error in machines. Today research is focused on Machine tool accuracy. The effect of thermal error contributes to major part of 70% of volumetric error. The present study aims to establish a new compensation method for CNC Turning centre.
R. Jamuna, U. Natarajan
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Machine-Tool Error Observer Design With Application to Thermal Error Tracking
Journal of Manufacturing Science and Engineering, 2018AbstractA parameter identification procedure for identifying the parameters of a volumetric error model of a large machine tool requires hundreds of random volumetric error components in its workspace and thus takes hours of measurement time. It causes thermal errors of a large machine difficult to be tracked and compensated periodically.
Hua-Wei Ko +6 more
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Thermal modelling of an HSC machining centre to predict thermal error of the feed system
Production Engineering, 2012Machine tools equipped with linear motors can achieve high feed speed as well as high accuracy. However, the direct feed drive system generates heat through power loss and friction. In combination with environmental influences such as machine shop climate, this can lead to a local deformation of the machine tool structure and induce a direct ...
Eckart Uhlmann, Jiangmin Hu
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