The Contribution of Air to Ultrasonic Friction Reduction

被引：0

作者：

Friesen, Rebecca Fenton ^{[1
]}

Wiertlewski, Michael ^{[2
]}

Peshkin, Michael A. ^{[1
]}

Colgate, J. Edward ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[2] Aix Marseille Univ, CNRS, ISM, Marseille, France

来源：

2017 IEEE WORLD HAPTICS CONFERENCE (WHC) | 2017年

基金：

美国国家科学基金会;

关键词：

SQUEEZE FILMS;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The origin of friction reduction on an ultrasonically vibrating plate has been the subject of debate. Recent work suggests that friction may be reduced due to intermittent contact caused by bouncing upon the vibrating surface [1], leaving the question of whether other phenomena such as levitation on a squeeze film of air also play a role. To probe the contribution of squeeze film levitation, we investigated the dependence of the friction reduction effect upon air pressure. An artificial finger was placed inside a vacuum chamber, touching an ultrasonic friction reduction device composed of a glass plate vibrated by piezo-actuators. Friction between the finger and the glass was measured by rotating the finger with a motor, and measuring the motor's torque load. Decreased friction is signaled by decreased motor current. Compared to atmospheric pressure, a 98% vacuum inside the chamber was observed to markedly diminish the friction reduction effect, suggesting that squeeze film levitation does indeed play a substantial role in ultrasonic friction reduction.

引用

页码：517 / 522

页数：6

共 15 条

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Wiertlewski, Michael
Friesen, Rebecca Fenton
Colgate, J. Edward
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