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	Three-dimensional Modeling for Predicting the Vibration Modes of Twin Ball Screw Driving Table
	WANG Renche ; ZHAO Tong ; YE Peiqing ; LIU Yan ; WANG Renche ; ZHAO Tong ; YE Peiqing ; LIU Yan
	2016-03-30 ; 2016-03-30
关键词	twin ball screw drive dynamic modeling vibration mode TG502.3
其他题名	Three-dimensional Modeling for Predicting the Vibration Modes of Twin Ball Screw Driving Table
中文摘要	As a redundant drive mechanism,twin ball screw feed system has the advantage of high stiffness and little yaw vibration in the feeding process,while leads to increased difficulty with vibration characteristics analysis and structure optimization.Only low-dimensional structure and dynamics parameters are considered in the existing research,the complete and effective model for predicting the table’s vibrations is lacked.A three-dimensional(3D)mechanical model of twin ball screw driving table is proposed.In order to predict the vibration modes of the table quantitatively,an analytical formulation following a comprehensive approach is developed,where the drive system is modeled as a lumped mass-spring system,and the Lagrangian method is used to obtain the table’s independent and coupled axial,yaw,and pitch vibration modes.The frequency variation of each mode is studied for different heights of the center of gravity,nut positions and table masses by numerical simulations.Modal experiment is carried out on the Z-axis feed table of the horizontal machining center MCH63.The results show that for each mode,the error between the estimated and the measured frequencies is less than 13%.The independent and coupled vibration modes are in accordance with the experimental results,respectively.The proposed work can serve a better understanding of the table’s dynamics and be beneficial for optimizing the structure parameters of twin ball screw drive system in the design stage.; As a redundant drive mechanism, twin ball screw feed system has the advantage of high stiffness and little yaw vibration in the feeding process, while leads to increased difficulty with vibration characteristics analysis and structure optimization. Only low-dimensional structure and dynamics parameters are considered in the existing research, the complete and effective model for predicting the table's vibrations is lacked. A three-dimensional(3D) mechanical model of twin ball screw driving table is proposed. In order to predict the vibration modes of the table quantitatively, an analytical formulation following a comprehensive approach is developed, where the drive system is modeled as a lumped mass-spring system, and the Lagrangian method is used to obtain the table's independent and coupled axial, yaw, and pitch vibration modes. The frequency variation of each mode is studied for different heights of the center of gravity, nut positions and table masses by numerical simulations. Modal experiment is carried out on the Z-axis feed table of the horizontal machining center MCH63. The results show that for each mode, the error between the estimated and the measured frequencies is less than 13%. The independent and coupled vibration modes are in accordance with the experimental results, respectively. The proposed work can serve a better understanding of the table's dynamics and be beneficial for optimizing the structure parameters of twin ball screw drive system in the design stage.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143815]
专题	清华大学
推荐引用方式 GB/T 7714	WANG Renche,ZHAO Tong,YE Peiqing,et al. Three-dimensional Modeling for Predicting the Vibration Modes of Twin Ball Screw Driving Table[J],2016, 2016.
APA	WANG Renche.,ZHAO Tong.,YE Peiqing.,LIU Yan.,WANG Renche.,...&LIU Yan.(2016).Three-dimensional Modeling for Predicting the Vibration Modes of Twin Ball Screw Driving Table..
MLA	WANG Renche,et al."Three-dimensional Modeling for Predicting the Vibration Modes of Twin Ball Screw Driving Table".(2016).

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