scholarly journals Stiffness modeling for near field acoustic levitation bearings

2021 ◽  
Vol 118 (20) ◽  
pp. 204102
Author(s):  
Yaoke Wang ◽  
Ping Guo
Keyword(s):  
Near Field ◽  
Acoustic Levitation ◽  
Stiffness Modeling

Acoustic radiation simulation and pre-stress effect on compact acoustic levitation platform

2019 ◽  
Vol 33 (07) ◽  
pp. 1950080 ◽  
Author(s):  
Bin Wei ◽  
Yongyong He ◽  
Wei Wang
Keyword(s):  
Pressure Distribution ◽  
Acoustic Radiation ◽  
Near Field ◽  
Parameters Optimization ◽  
Squeeze Film ◽  
Acoustic Levitation ◽  
Stress Effect ◽  
Biological Engineering ◽  
Loop Control ◽  
Close Loop Control

In order to satisfy the requirements of precise components with tidiness, low power and high stability in the field of biological engineering, medical equipment and semiconductors etc. a pre-stress acoustic transport prototype without horn was proposed in this paper. The mechanism of levitation and transport which is driven by orthogonal waves was revealed by the analysis of waveform and squeeze film characteristics in high-frequency exciting condition; also, the electric, solid and acoustic coupled finite element method (FEM) was established to investigate the effect of pre-stress and acoustic pressure distribution in the near field. The levitation and driving capacity of near field acoustic levitation (NFAL) transport platform without horns can be proved in this experiment and further to achieve the goal of parameters optimization. The theoretical and experimental results indicate that the pre-stress has a significant effect on resonant frequency and levitating stability, the pre-stress are determined by the DC voltage offset which is related to the system working point so that we cannot increase the offset and exciting voltage unlimitedly to improve the stability. At the same time, the calculated pressure distribution of acoustic radiation can generally reflect the regional bearing capacity in near and far field for levitation. These achievements can partly solve the problem of accuracy design of prototype and thickness of gas film, supporting for accuracy close loop control of levitating height.

scholarly journals Near-field acoustic levitation and applications to bearings: a critical review

2019 ◽  
Vol 1 (3) ◽  
pp. 032002 ◽  
Author(s):  
Minghui Shi ◽  
Kai Feng ◽  
Junhui Hu ◽  
Jiang Zhu ◽  
Hailong Cui
Keyword(s):  
Critical Review ◽  
Near Field ◽  
Acoustic Levitation

Non-contact Transportation Using Near-Field Acoustic Levitation

2008 ◽  
Vol 111 (1074) ◽  
pp. 420-423 ◽  
Author(s):  
Yoshikazu KOIKE ◽  
Sadayuki UEHA
Keyword(s):  
Near Field ◽  
Acoustic Levitation

scholarly journals Contactless pick-and-place of millimetric objects using inverted near-field acoustic levitation

2020 ◽  
Vol 116 (5) ◽  
pp. 054104 ◽  
Author(s):  
Marco A. B. Andrade ◽  
Tiago S. Ramos ◽  
Julio C. Adamowski ◽  
Asier Marzo
Keyword(s):  
Near Field ◽  
Acoustic Levitation ◽  
Pick And Place

INTERVAL UNCERTAINTY AND SENSITIVITY ANALYSES DEDICATED TO THE NEAR-FIELD ACOUSTIC LEVITATION FORCE

2019 ◽  
Author(s):  
Geisa Zuffi ◽  
Fabian Andres Lara-Molina ◽  
Fran Lobato ◽  
Aldemir Ap Cavalini Jr ◽  
Valder Steffen Jr
Keyword(s):  
Levitation Force ◽  
Near Field ◽  
Interval Uncertainty ◽  
Sensitivity Analyses ◽  
Acoustic Levitation
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