Results 121 to 130 of about 52,646 (158)
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Volumetric error compensation for multi-axis machines
[Proceedings] 1992 IEEE International Conference on Systems, Man, and Cybernetics, 2003A general error prediction and compensation scheme which implicitly includes the non-rigid body condition is developed for an arbitrary multi-axis machine. The accuracy and precision of tasks performed by multi-axis machines are profoundly affected by their volumetric accuracy. The volumetric accuracy of a machine depends on numerous factors, including
S.M. Wang, K.F. Ehmann
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Volumetric efficiency and experimental errors of rotary compressors
International Journal of Refrigeration, 1980Resume Theoretical and experimental investigations of the factors which affect the volumetric efficiency of a rolling piston compressor have been made. The results show that a trend in the theoretical volumetric efficiency agrees fairly well with the experimental one, and that gas leakage through clearances, as well as the temperature rise of the ...
T. Shimizu, M. Kobayashi, T. Yanagisawa
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The International Journal of Advanced Manufacturing Technology, 2003
This paper proposes a modified volumetric error model that includes spindle error motions as well as geometric errors. The model is constructed using rigid-body kinematics and homogeneous transformation matrices and an additional error matrix describing spindle error motions is included.
J.-P. Choi, S.-J. Lee, H.-D. Kwon
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This paper proposes a modified volumetric error model that includes spindle error motions as well as geometric errors. The model is constructed using rigid-body kinematics and homogeneous transformation matrices and an additional error matrix describing spindle error motions is included.
J.-P. Choi, S.-J. Lee, H.-D. Kwon
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International Journal of Machine Tools and Manufacture, 1997
This paper presents a useful technique for assessing the volumetric errors in multiaxis machine tools using a kinematic double ball bar. This system has been developed based on a volumetric error model which describes the three-dimensional errors of machine tools.
Heui Jae Pahk +2 more
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This paper presents a useful technique for assessing the volumetric errors in multiaxis machine tools using a kinematic double ball bar. This system has been developed based on a volumetric error model which describes the three-dimensional errors of machine tools.
Heui Jae Pahk +2 more
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Analyzing sampled terrain volumetrically with regard to error and geologic variation
SPIE Proceedings, 2007Most terrain models are created based on a sampling of real-world terrain, and are represented using linearly-interpolated surfaces such as triangulated irregular networks or digital elevation models. The existing methods for the creation of such models and representations of real-world terrain lack a crucial analytical consideration of factors such as
Thomas Butkiewicz +3 more
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Analysis of systematic and random error in MR volumetric flow measurements
Magnetic Resonance in Medicine, 1993AbstractThe spatial aspects of error in 2D MR cine phase‐velocity mapping are considered in order to define acquisition strategies which will minimize error in measuring volumetric flow. Error was separated into two categories: systematic and random. Potential sources of systematic error examined were intravoxel phase dispersion (IVPD), partial volume ...
R L, Wolf +3 more
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Volumetric compensation of accuracy errors in a multi-robot surgical platform
2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2015A multi-robot platform, made of a hybrid parallel kinematic machine and 2 KUKA LWR arms, is dedicated to open skull neuro-surgical tasks. Sub-millimeter accuracy is clearly required for both the absolute tool tracking and for good performances in motion compensation when the head is set free to move.
Vicentini Federico +3 more
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A comprehensive error analysis of horizontal machining center based on volumetric error model
2011 International Conference on Consumer Electronics, Communications and Networks (CECNet), 2011The machine tool accuracy is comprehensively affected by geometric, thermal, and cutting force-induced errors. A key step in accuracy design and error compensation is error origins analysis. The object of this study is a MCH63 Precision Horizontal Machining Center.
Dong Zhai +3 more
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Maximizing Machine Volumetric Performance by Minimizing Plane Squareness Error
NCSLI Measure, 2014In a 3 axis orthogonal machine frame, there are 21 parametric error sources: 3 linear positioning, 6 straightness, 9 angular, and 3 plane squareness errors. Of all the sources of error, the squareness errors can quickly dominate the volumetric performance of the machine.
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Remark on Volumetric Errors in Kinematic Chain of MCV 754 Quick
2020In this article we assemble kinematic machine chains using homogeneous matrices and we get error vector DX, DY, DZ. At the same time we are working with error vector obtained using standard software tools by multilateration method. We compare the resulting values of both approaches and we are discussing.
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