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State estimation and decoupling of unknown inputs in uncertain LPV systems using interval observers

AuthorsRotondo, Damiano ; Cristofaro, Andrea; Arne Johansen, Tor; Nejjari, Fatiha; Puig, Vicenç
KeywordsUnknown input observers
Linear parameter varying (LPV) systems
Fault detection and isolation
Uncertain systems
Interval observers
Issue Date13-Jun-2018
PublisherTaylor & Francis
CitationInternational Journal of Control 91(8): 1944–1961 (2018)
AbstractThis paper proposes a linear parameter varying (LPV) interval observer for state estimation and unknown inputs decoupling in uncertain continuous-time LPV systems. Two different problems are considered and solved: (1) the evaluation of the set of admissible values for the state at each instant of time; and (2) the unknown input observation, i.e. the design of the observer in such a way that some information about the nature of the unknown inputs affecting the system can be obtained. In both cases, analysis and design conditions, which rely on solving linear matrix inequalities (LMIs), are provided. The effectiveness and appeal of the proposed method is demonstrated using an illustrative application to a two-joint planar robotic manipulator.
Publisher version (URL)https://doi.org/10.1080/00207179.2017.1335882
Appears in Collections:(IRII) Artículos
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