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Steady-State Error Band Improvement Using Dead-Beat Terminal Sliding Mode Control

2022; Institute of Electrical and Electronics Engineers; Volume: 69; Issue: 8 Linguagem: Inglês

10.1109/tcsii.2022.3169834

1558-3791

Lingwei Wu, Bicheng Lei, Mingxuan Sun,

Multilevel Inverters and Converters

This brief presents the development of a dead-beat terminal sliding mode control strategy, based on the smooth terminal sliding function and the dead-beat reaching law (RL). By means of the dead-beat RL, the sliding mode occurrence is always guaranteed and the desired tracking error dynamics can be achieved by the chosen smooth terminal sliding function. A finite-order backward-difference uncertainty compensator is incorporated into the controller design to improve the uncertainty rejection capability. The steady-state error band is analyzed in detail, for characterizing the attractivity and steady-state tracking performance with respect to control parameters. Effectiveness of the proposed control strategy is illustrated by simulation results on a DC-DC buck converter.