Paper Info
Title
The contribution of air to ultrasonic friction reduction
Abstract
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.
Year
DOI
Venue
2017
10.1109/WHC.2017.7989955
2017 IEEE World Haptics Conference (WHC)
Keywords
Field
DocType
ultrasonic friction reduction,ultrasonically vibrating plate,intermittent contact,vibrating surface,squeeze film levitation,artificial finger,vacuum chamber,glass plate,piezo-actuators
Ultrasonic sensor,Torque,Computer science,Atmospheric pressure,Control engineering,Levitation,Vacuum chamber,Vibration
Conference
ISBN
Citations 
PageRank 
978-1-5090-1426-2
0
0.34
References 
Authors
7
4
Name
Order
Citations
PageRank
Rebecca Fenton Friesen1111.85
Michaël Wiertlewski29811.99
Michael A. Peshkin3812104.61
J. Edward Colgate41268202.92