Robust Output Feedback Control with Predefined State Boundaries for Multi-Rotor Systems

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This paper introduces a robust controller for multi-rotor systems that can effectively handle aggressive and high-magnitude disturbances, both in the orientation and position subsystems. Our control design uses only position and angular position vector information and comprises two primary algorithms: a state feedback controller and an extended high-gain observer. Moreover, the proposed controller provides asymptotic stability while satisfying user-imposed constraints on the position, velocity, and angular position error states. To achieve this goal, we introduce a barrier Lyapunov function, which guarantees that the tracking error trajectories of the system remain within the constraints. We evaluate the performance of our proposed control through numerical simulations and a comparison with a state-of-the-art popular controller. The results illustrate the effectiveness of our approach in coping with high-magnitude disturbances, especially in the positioning subsystem of the multi-rotor system.

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