Article Dans Une Revue IEEE Control Systems Letters Année : 2025

A Novel Unknown Input Observer Design for Nonlinear LPV Systems

Résumé

This paper presents the design of an unknown input observer (UIO) for linear parameter-varying (LPV) systems, including nonlinearities that are assumed to fulfill one-sided Lipschitz quadratically inner-bounded (OSL-QIB) conditions. The proposed approach introduces a novel extension of conventional LPV frameworks by directly incorporating nonlinear terms, aiming to improve observer performance and reduce the modeling errors typically introduced during the transformation of a nonlinear system into its LPV counterpart. A key contribution of this work is the development of a UIO design that avoids the state transformation step, which is often highly complex and only valid under restrictive assumptions such as a constant unknown input matrix D. By eliminating this constraint, the proposed observer design significantly enhances scalability and applicability to a broader class of systems. The performance and effectiveness of the approach are demonstrated through both a numerical example and a well-established open-channel flow benchmark: the Corning channel in California, USA. © 2017 IEEE.

Dates et versions

hal-05166661 , version 1 (17-07-2025)

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Citer

Juan Pablo Arango, Lucien Etienne, Eric Duviella, Kokou Langueh, Pablo Segovia, et al.. A Novel Unknown Input Observer Design for Nonlinear LPV Systems. IEEE Control Systems Letters, 2025, 9, pp.1658-1663. ⟨10.1109/LCSYS.2025.3580325⟩. ⟨hal-05166661⟩
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