An Enhanced Ultrasonic Frequency Closed-Loop Control System for Biological Decomposition

DOI

10.2991/eame-15.2015.13How to use a DOI?

Keywords

frequency tracking; DDS; PI control; biological decomposition

Abstract

Frequency automatic tracking is a main characteristic of ultrasonic power system, especially in the field of biological decomposition. In this paper, after analysing characteristics of multiple peaks of transducer, a reliable power control and frequency tracking strategy is introduced. It is based on an accurate and fast strategy of frequency tracking; by taking samples of the error of phase difference with small resistance method, two control strategies of DDS (Direct Digital Synthesizer) and PI (proportional-integral) adjustment associate with each other to reduce the error. Then the transducer array keeps an effective working state, the whole system realizes low distortion, variable resonance frequencies and adjustable amplitude. The system improves power factor and meets the needs for dealing with different kinds of biological samples.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - E. Shi
AU  - C. Hu
AU  - Y.S. Xu
PY  - 2015/07
DA  - 2015/07
TI  - An Enhanced Ultrasonic Frequency Closed-Loop Control System for Biological Decomposition
BT  - Proceedings of the 2015 International Conference on Electrical, Automation and Mechanical Engineering
PB  - Atlantis Press
SP  - 47
EP  - 51
SN  - 2352-5401
UR  - https://doi.org/10.2991/eame-15.2015.13
DO  - 10.2991/eame-15.2015.13
ID  - Shi2015/07
ER  -