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.
| Original language | English (US) |
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| Title of host publication | 2017 IEEE World Haptics Conference, WHC 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 517-522 |
| Number of pages | 6 |
| ISBN (Electronic) | 9781509014255 |
| DOIs | |
| State | Published - Jul 21 2017 |
| Event | 7th IEEE World Haptics Conference, WHC 2017 - Munich, Germany Duration: Jun 6 2017 → Jun 9 2017 |
Publication series
| Name | 2017 IEEE World Haptics Conference, WHC 2017 |
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Other
| Other | 7th IEEE World Haptics Conference, WHC 2017 |
|---|---|
| Country/Territory | Germany |
| City | Munich |
| Period | 6/6/17 → 6/9/17 |
Funding
This work was made possible by funding from NSF Grant IIS-1302422. MW acknowledges the support of ANR-16-CE33-0002-01.
ASJC Scopus subject areas
- Instrumentation
- Cognitive Neuroscience
- Sensory Systems
- Human Factors and Ergonomics
- Human-Computer Interaction