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Design and Performance Analysis of Networked Predictive Control Systems Based on Input-Output Difference Equation Model

Zhong-Hua Pang*, Guo-Ping Liu, Donghua Zhou, and Dehui Sun
International Journal of Control, Automation, and Systems, vol. 15, no. 1, pp.416-426, 2017

Abstract : "This paper is concerned with the design and performance analysis of networked control systems, where random network-induced delay, packet disorder, and packet dropout in the feedback and forward channels are considered simultaneously and further treated as the round-trip time (RTT) delay. To actively compensate for the RTT delay, a networked predictive control scheme is designed based on the input-output difference equation model. For time-varying reference signals, the resulting closed-loop system can achieve the same output tracking performance and closed-loop stability as the corresponding local control system. Specifically, for the step reference input, it can provide a zero steady-state output tracking error. The controller design problem is solved by using the augmented state-space model as well as the static output feedback strategy. In addition, the stability of the closed-loop system is also discussed for the plant subject to bounded disturbances and modelling errors. Finally, simulation and experimental results are given to demonstrate the effectiveness of the proposed method."

Keyword : "Input-output model, networked control systems (NCSs), performance analysis, predictive control, round-trip time delay, stability analysis."

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