Rapid mode-switching for acoustic manipulation

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Abstract

Acoustic manipulation techniques are becoming increasingly common with a range of applications in the biomedical research, microassembly, and lab-on-a-chip. Recently, a class of devices have attracted considerable attention which utilize dynamic and reconfigurable acoustic fields, known as dynamic-field acoustic devices. A common method of applying dynamic fields is to use mode-switching by rapidly altering the excitation frequency. Such methods generally rely on the switching being performed faster than the time constant associated with the particle motion. Nevertheless, it remains a grand challenge to eliminate or at least reduce the switching time to a minimal value. In this paper, we suggest employing a high-speed controller to minimize the switching time, enabling continuous particle manipulation in a dynamic-field acoustic device. As a proof-of-concept, we apply such idea to a classic acoustic manipulation device, a Chladni plate which consists of a centrally-actuated vibrating plate. By employing a closed-loop real-time controller, we show successful manipulation of particles on the plate on predefined trajectories. The high-speed switching methodology can also be applied to other dynamic-field acoustic methods, such as surface acoustic wave (SAW) devices, acoustic levitators, and in-fluid acoustic devices. This can result in faster and smoother particle manipulation in such devices.

Details

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Manipulation, Automation, and Robotics at Small Scales, MARSS 2019
EditorsSinan Haliyo, Albert Sill, Quan Zhou, Pasi Kallio, Sergej Fatikow
Publication statusPublished - 1 Jul 2019
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Manipulation, Automation and Robotics at Small Scales - TUAS, Maarintie 8, Espoo, Finland
Duration: 1 Jul 20195 Jul 2019
http://marss-conference.org/

Conference

ConferenceInternational Conference on Manipulation, Automation and Robotics at Small Scales
Abbreviated titleMARSS
CountryFinland
CityEspoo
Period01/07/201905/07/2019
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    Research areas

  • Acoustic manipulation, Chladni plate, Dynamic-filed acoustic device, Mode-switching, Model predictive control, Real-time control

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