一种基于旋转行波的悬浮装置外文文献.pdfVIP

Sensors and Actuators A 255 (2017) 34–45 Contents lists available at ScienceDirect Sensors and Actuators A: Physical j o u r na l h o me p a ge : w w w. elsev /locate/sna A rotational traveling wave based levitation device – Modelling, design, and control Ran Gabai a,∗ , Dotan Ilssar a , Ran Shaham a , Nadav Cohen b , Izhak Bucher a a Dynamics Laboratory, Faculty of Mechanical Engineering, Technion, Israel Institute of Technology, Haifa 3200003, Israel b Nadav Cohen, Engineering Consulting and Research, Hatchelet 232, Haifa, Israel a r t i c l e i n f o a b s t r a c t Article history: Described is a device acting on an acoustically levitated object by manipulating the pressure and flow Received 9 August 2016 of a thin layer of air such that its rotation can be precisely controlled without mechanical contact. Vir- Received in revised form tual work analysis assists in simplifying the multi-actuator control problem into one governed by a single 14 December 2016 controllable parameter. Actuation is accomplished by a vibrating annulus capable of producing ultrasonic Accepted 15 December 2016 Available online 28 December 2016 standing and traveling waves. Thus creating the acoustic excitation that affects the pressure in a thin, intermediate layer of gas. A distinctive vibration pattern is required to generate the temporal and spatial pressure field of the squeezed air layer that gives rise to both acoustic le