Robust unknown input observer for state and fault estimation in discrete-time Takagi-Sugeno systems
In this paper, a robust unknown input observer (UIO) for the joint state and fault estimation in discrete-time Takagi-Sugeno (TS) systems is presented. The proposed robust UIO, by applying the H-infinity framework, leads to a less restrictive design procedure with respect to recent results found in...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/89070 |
| Acceso en línea: | https://hdl.handle.net/2117/89070 https://dx.doi.org/10.1080/00207721.2016.1165898 |
| Access Level: | acceso abierto |
| Palabra clave: | Failure analysis (Engineering) State estimation fault diagnosis unknown input observers (UIOs) Takagi-Sugeno (TS) fuzzy systems NONLINEAR UNCERTAIN SYSTEMS FUZZY CONTROL DESIGN DIAGNOSIS MODELS IDENTIFICATION STABILITY MATRICES Anàlisi de fallades (Enginyeria) Àrees temàtiques de la UPC::Informàtica::Automàtica i control |
| Sumario: | In this paper, a robust unknown input observer (UIO) for the joint state and fault estimation in discrete-time Takagi-Sugeno (TS) systems is presented. The proposed robust UIO, by applying the H-infinity framework, leads to a less restrictive design procedure with respect to recent results found in the literature. The resulting design procedure aims at achieving a prescribed attenuation level with respect to the exogenous disturbances, while obtaining at the same time the convergence of the observer with a desired bound on the decay rate. An extension to the case of unmeasurable premise variables is also provided. Since the design conditions reduce to a set of linear matrix inequalities that can be solved efficiently using the available software, an evident advantage of the proposed approach is its simplicity. The final part of the paper presents an academic example and a real application to a multi-tank system, which exhibit clearly the performance and effectiveness of the proposed strategy. |
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