Networked Real-Time Control Strategy Dealing With Stochastic Time Delays and Packet Losses
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A novel model-predictive-control strategy with a timeout scheme and p-step-ahead state estimation is presented in this paper to overcome the adverse influences of stochastic time delays and packet losses encountered in network-based distributed real-time control. An open-loop unstable magnetic-levitation (maglev) test bed was constructed and employed for its experimental verification. The compensation algorithms developed in this paper deal with the network-induced stochastic time delays and packet losses in both the forward path and the feedback path simultaneously. With the p-sampling-period delay upper bound, the networked control system (NCS) can also accommodate up to p-1 successive packet losses. Experimental results demonstrate the feasibility and effectiveness of this networked real-time control strategy. Copyright © 2006 by ASME.
author list (cited authors)
Kim, W., Ji, K., & Ambike, A.