期刊
JOURNAL OF SOUND AND VIBRATION
卷 376, 期 -, 页码 166-181出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2016.04.020
关键词
Ballscrew drive system; Dynamic substructuring; Receptance coupling; Position-dependent dynamics; Sensitivity analysis
资金
- National Natural Science Foundation of China [51235009]
An accurate model of the feed drive's high-order position-dependent dynamics is crucial for the analysis and controller design of a high-performance machine tool. In this paper, a new dynamic substructuring condition-multi-subsystem connected via a wedge mechanism is introduced, which is originated from the ballscrew-nut dynamic coupling interface. Receptance coupling equations were derived for the condition, and a dynamic modeling approach is developed for the ballscrew drive system based on the equations. The developed model accounts for the ballscrew's rotational and axial flexibilities and the dynamic couplings among these flexibilities and that of the sliding component. The model explicitly describes the dynamics variation with respect to the table position, and is particularly suitable for sensitivity based analysis. Based on the model, the position dependent dynamics of an example ballscrew drive was analyzed, by using the frequencies distribution, the modal shape, and especially the sensitivity of the frequency response functions with respect to the table position. (C) 2016 Elsevier Ltd. All rights reserved.
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