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Nanometer Positioning System Based on Ball Screw

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Abstract:

This paper deals with nanometer positioning in the presence of friction. The object researched is a ball-screw-driven and linear-ball-guide-supported table system. For such system, models that do not account for friction can only be applicable to describe the macrodynamic behavior which is significantly different from the microdynamic one. A PID controller is designed with high-loop gain to suppress the effect of friction. The controller parameters are calculated by pole placement according to macrodynamics, no identification of friction and friction model are necessary. Experiment and simulation results indicate that nanometer positioning can be realized in this system by the controller. In point-to-point (PTP) positioning for step heights from 0.1μm to 1mm, the positioning error is within ±5 nm and the response characteristics are satisfactory.

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Periodical:

Key Engineering Materials (Volumes 315-316)

Pages:

710-714

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.315-316.710

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Online since:

July 2006

Authors:

Li Hua Lu, Ying Chun Liang, H. Tachikawa, Yong Feng Guo, Akira Shimokohbe

Keywords:

Ball Screw, Friction, Nanometer Positioning, PID Controller

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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