Feng Kai, Liu Yuanyuan, Cheng Miaomiao
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, 2 Lushan Road South, Yuelu District, Changsha 410082, China.
College of Electrical and Information Engineering, Hunan University, 2 Lushan Road South, Yuelu District, Changsha 410082, China.
J Acoust Soc Am. 2015 Dec;138(6):3723-32. doi: 10.1121/1.4938220.
Owing to its distinct non-contact and oil-free characteristics, a self-running sliding stage based on near-field acoustic levitation can be used in an environment, which demands clean rooms and zero noise. This paper presents a numerical analysis on the lifting and transportation capacity of a non-contact transportation system. Two simplified structure models, namely, free vibration and force vibration models, are proposed for the study of the displacement amplitude distribution of two cases using the finite element method. After coupling the stage displacement into the film thickness, the Reynolds equation is solved by the finite difference method to obtain the lifting and thrusting forces. Parametric analyses of the effects of amplitude, frequency, and standing wave ratio (SWR) on the sliding stage dynamic performance are investigated. Numerical results show good agreement with published experimental values. The predictions also reveal that greater transportation capacity of the self-running sliding stage is generally achieved at less SWR and at higher amplitude.
