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Multirate control in internet-based control systems

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posted on 2007-03-29, 11:02 authored by Lili Yang, Shuang-Hua Yang
One of the major challenges in Internet-based control systems is how to overcome the Internet transmission delay. In this paper, we investigate the potential of using the multirate control scheme and the time-delay compensation to overcome the Internet transmission delay. A two-level hierarchy is used for the Internet-based control systems.At the lower level, a local controller is implemented to control the plant at a higher frequency. At the higher level, a remote controller is employed to remotely regulate the desirable set-point at a lower frequency for the local controller. A compensator located at the feedback channel is designed to overcome the time delay occurring in the transmission from the local site to a remote site. Another compensator in the feedforward channel is designed to compensate the time-delay occurring in the control action transmission. The simulation and experimental application results illustrate that the multirate control scheme with the time delay compensation offers a promising way to efficiently reduce the effect of Internet time delay on control performance.



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YANG, L. and YANG, S.H., 2007. Multirate control in internet-based control systems. IEEE Transactions on Systems, Man and Cybernetics. Part C, Applications and Reviews, 37 (2), pp. 185-192


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This article was published in the journal, IEEE Transactions on Systems, Man and Cybernetics. Part C, Applications and Reviews [© IEEE Systems Man & Cybernetics Society] and is also available at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=5326 Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.




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