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Robust Model Predictive Control with Time-Varying Tubes

Pornchai Bumroongsri* and Soorathep Kheawhom
International Journal of Control, Automation, and Systems, vol. 15, no. 4, pp.1479-1484, 2017

Abstract : "This paper focuses on the problem of robustly stabilizing uncertain discrete-time systems subject to bounded disturbances. The proposed tube-based model predictive controller ensures that all possible realizations of the state trajectory lie in the time-varying tubes so robust stability and satisfaction of the state and input constraints are guaranteed. The time-varying tubes are computed off-line so the on-line computational time is tractable. At each sampling time, the precomputed time-varying tubes are included in the optimal control problem as the constraints in the prediction horizon and only a quadratic programming problem is solved. In comparison to the algorithm that calculates the time-varying tubes on-line, the proposed algorithm can achieve the same level of control performance while the on-line computational time is greatly reduced."

Keyword : Bounded disturbances, model predictive controller, robust stability, time-varying tubes.

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