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Data-Driven Sliding Mode Control for Partially Unknown Nonlinear Systems (2403.16136v1)

Published 24 Mar 2024 in eess.SY and cs.SY

Abstract: This paper introduces a new design method for data-driven control of nonlinear systems with partially unknown dynamics and unknown bounded disturbance. Since it is not possible to achieve exact nonlinearity cancellation in the presence of unknown disturbance, this paper adapts the idea of sliding mode control (SMC) to ensure system stability and robustness without assuming that the nonlinearity goes to zero faster than the state as in the existing methods. The SMC consists of a data-dependent robust controller ensuring the system state trajectory reach and remain on the sliding surface and a nominal controller solved from a data-dependent semidefinite program (SDP) ensuring robust stability of the state trajectory on the sliding surface. Numerical simulation results demonstrate effectiveness of the proposed data-driven SMC and its superior in terms of robust stability over the existing data-driven control that also uses approximate nonlinearity cancellation.

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