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Proceedings Paper

Driving property of twist-roller friction mechanism in ultraprecision positioning system
Author(s): Bing Luo; Zhe-hui Lin; Shengyi Li; Yi-fan Dai
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Paper Abstract

Twist-roller friction drive is a new kind of feeding way that can achieve both high motion resolution and long stroke, however its further property analysis is seldom seen on any reports. Firstly, by analyzing lead-load property of the mechanism theoretically, this paper shows that microelastic deformation of the contact region caused by load is the reason why load can affect the lead. Then the relationship between change load and lead is deduced theoretically. Subsequently, experiments are carried out to prove the formula. Finally, a method, which accurately measures the lead, is given. Further study shows that lead and load present a near-linear relationship under small twist angle condition, which is fundamental case in twist-roller friction driving systems. Based on some linear approximation, a physical model is obtained and then analyzed. The precise model is nonlinear, it is near to a inertial system in the form of the transform function, but its time constant varies with the angle velocity of the motor, so reasonable simplifications are made and then we can easy to find good control method for the system for the case.

Paper Details

Date Published: 15 October 2001
PDF: 6 pages
Proc. SPIE 4601, Micromachining and Microfabrication Process Technology and Devices, (15 October 2001); doi: 10.1117/12.444714
Show Author Affiliations
Bing Luo, National Univ. of Defense Technology (China)
Zhe-hui Lin, National Univ. of Defense Technology (China)
Shengyi Li, National Univ. of Defense Technology (China)
Yi-fan Dai, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 4601:
Micromachining and Microfabrication Process Technology and Devices

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