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Lubricants 2015, 3(2), 132-141; doi:10.3390/lubricants3020132

Frictional Characteristics of a Small Aerostatic Linear Bearing

1
School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan
2
Faculty of Engineering, Rajamangala University of Technology Isan, No. 744 Suranarai Road, Muang, Nakhon Ratchasima 30000, Thailand
3
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Academic Editors: Romeo P. Glovnea and Michel Fillon
Received: 2 February 2015 / Revised: 9 March 2015 / Accepted: 16 March 2015 / Published: 2 April 2015
(This article belongs to the Special Issue Friction and Lubrication of Bearings)
View Full-Text   |   Download PDF [599 KB, uploaded 7 April 2015]   |  

Abstract

Frictional characteristics of a small aerostatic linear bearing are accurately evaluated by means of a method, in which the force acting on the moving part of the bearing is measured as the inertial force. An optical interferometer is newly developed to measure the Doppler shift frequency of the laser light reflected on the small moving part. From the measured time-varying Doppler shift frequency, the velocity, the position, the acceleration and the inertial force of the moving part are numerically calculated. It is confirmed that the dynamic frictional force acting inside the bearing is almost proportional to the velocity of the moving part and is similar to the theoretical value calculated under the assumption that the flow inside the bearing is the Couette flow. View Full-Text
Keywords: air bearing; aerostatic bearing; pneumatic bearing; inertial force; inertia mass; optical interferometer air bearing; aerostatic bearing; pneumatic bearing; inertial force; inertia mass; optical interferometer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Araki, R.; Takita, A.; Nachaisit, P.; Shu, D.-W.; Fujii, Y. Frictional Characteristics of a Small Aerostatic Linear Bearing. Lubricants 2015, 3, 132-141.

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