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Dynamic output feedback tracking control for discrete-time systems with multiple disturbances via disturbance observer and H∞ control

In this paper, a dynamic output feedback tracking controller is studied for a class of discrete-time system with multiple disturbances. A composite anti-disturbance tracking controller is proposed based on disturbance observer and H∞ control schemes, which can guarantee system have a good anti-disturbance performance. A solvable sufficient condition is given via linear matrix inequality. Finally, a numerical example is employed to demonstrate the effectiveness of the proposed control approach.