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Proceedings Paper

Analyzing dynamic characteristics of NC table with SVD
Author(s): Linhong Wang; Bo Wu
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Paper Abstract

This article employs SVD (singular value decomposition) method to study dynamic characteristics of NC (numerical control) table. Acceleration signals of the NC table at three directions were tested; the singular spectrum of the signals was acquired with SVD; principal components of the signals were found out; the dynamic characteristics of the signals and its contributing factors were studied through extracting dynamic characteristics of principal components; and quantitative analysis was made on signals and principal components through calculating signal energy. The results indicated that signal characteristics of the previous two principal components are apparent, based on which dynamic characteristics of chaotic signal can be extracted; signal at perpendicular direction of table is greatly correlated with that at the horizontal moving direction, indicating that they are excited from the same vibration source. But signals perpendicular to each other in terms of moving direction at the horizontal level is rarely correlated; total signal energy is maximum at moving direction, minimum at horizontal non-moving direction and in the middle at perpendicular non-moving direction; bending vibration of lead screw at perpendicular direction is far more violent than that at horizontal direction.

Paper Details

Date Published: 31 December 2008
PDF: 7 pages
Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 713057 (31 December 2008); doi: 10.1117/12.819747
Show Author Affiliations
Linhong Wang, Nanyang Institute of Technology (China)
Huazhong Univ. of Science and Technology (China)
Bo Wu, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7130:
Fourth International Symposium on Precision Mechanical Measurements
Yetai Fei; Kuang-Chao Fan; Rongsheng Lu, Editor(s)

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