Modal shapes optimization and feasibility analysis of NFAL platform

• Main Authors: Bin WEI, I BUCHER, M ATHERTON, T A STOLASKI
• Format: Article
• Language: zho
• Published: Hebei University of Science and Technology 2017-08-01
• Series: Journal of Hebei University of Science and Technology
• Subjects: tribology; near field ultrasound levitation; resonance; modal shapes; orthogonal waves
• Online Access: http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201704001&flag=1&journal_

In order to avoid friction and scratching between the conveyor and the precision components when conveying object, an compact non-contact acoustic levitation prototype is designed, and the feasibility is theoretically and experimentally verified. The symmetry model is established through kinetic analysis with ANSYS. The modal and the coupled field computation at the central point of the transfer platform are simulated. The simulation results show that pure flexural or mixed flexural wave shapes appear with different wave numbers on the platform. Sweep frequency test is conducted on the compact platform prototype. The levitation experimental results confirm the feasibility of the ultrasound transfer process, the levitation frequency range and the mode of vibration. The theoretical and experimental results show that the optimal design of the modal and the carrying capacity of the driving platform is necessary according to different conditions. The research results provide a reference for the design of the mode and bandwidth of the ultrasonic levitation platform.