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Journal of Control Science and Engineering
Volume 2009 (2009), Article ID 591506, 11 pages
http://dx.doi.org/10.1155/2009/591506
Research Article

Low-Latency Wireless Data Transfer for Motion Control

1Electromechanics and Power Electronics Group, Department of Electrical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
2Radiocommunications Group, Department of Electrical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands

Received 14 January 2009; Accepted 2 July 2009

Academic Editor: Benoit Boulet

Copyright © 2009 Jeroen de Boeij et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper discusses a new approach for wireless motion control. Existing wireless techniques suffer from large closed loop delays of several milliseconds, which is unacceptable in precision motion systems. These large delays are mainly caused by the protocol used, since these are optimized for transferring large amounts of data, not to minimize transmission delay. A new protocol and wireless system are proposed that reduce the closed loop transmission delay to less than 300 microseconds. The system has been verified in a real control system, and measurements show the performance, which is more than ten times better than existing techniques.