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1 International Journal of Applied Mathematics and Computer Science

1 2020

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Discrete-time sliding mode control of linear systems with input saturation

Veselić Boban, Milosavljević Čedomir, Peruničić-Draženović Branislava, Huseinbegović Senad, Petronijević Milutin

International Journal of Applied Mathematics and Computer Science

2020

Vol. 30, no. 3

517--528

The paper proposes a discrete-time sliding mode controller for single input linear dynamical systems, under requirements of the fast response without overshoot and strong robustness to matched disturbances. The system input saturation is imposed during the design due to inevitable limitations of most actuators. The system disturbances are compensated by employing nonlinear estimation by integrating the signum of the sliding variable. Hence, the proposed control structure may be regarded as a super-twisting-like algorithm. The designed system stability is analyzed as well as the sliding manifold convergence conditions are derived using a discrete-time model of the system in the δ-domain. The results obtained theoretically have been verified by computer simulations.