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Communication Dans Un Congrès Année : 2013

Recent advances in fault diagnosis and fault tolerant control for nonlinear systems

Résumé

Despite a lot of works in the area of fault detection and isolation (FDI) and fault tolerant control (FTC) for nonlinear systems, this research topic remains still active. Indeed, the com-plexity of some theoretical methods allowing the inclusion of nonlinearities is clearly an obstacle to their diffusion and implementation on real processes. The proposed talk is dedicated to the presentation of some recent advances in this area using the so-called Takagi-Sugeno (TS) models (also called time-varying polytopic model or quasi-LPV model). Over the last three decades, the TS modeling framework have attracted a great attention in the control community. After a period of skepticism, justified by the absence of clear demonstrations of these model properties, this type of model is now part of the almost standard tools of control engineers. Indeed, Takagi-Sugeno modeling has proved its effectiveness in the study of nonlinear systems. TS models can be understood as polytopic systems, where the blending between subsystems is time varying according to the so-called weighting functions. Thanks to the convexity of the blending and to the linearity of the subsystems defining the vertices, some results can be established for nonli-near systems, using tools borrowed from the linear theory. In that sense, the stability study and the controller/observer design of nonlinear systems is simplified. The flexibility of that approach will be highlighted through its ability, during the control design, to take into account actuator saturations or, in the diagnosis framework, to estimate simultaneously the state and unknown time-varying parameter of the model.
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Dates et versions

hal-00914039 , version 1 (04-12-2013)

Identifiants

  • HAL Id : hal-00914039 , version 1

Citer

Didier Maquin. Recent advances in fault diagnosis and fault tolerant control for nonlinear systems. 3rd International Symposium on Security and Safety of Complex Systems, 2SCS'13, Nov 2013, Agadir, Morocco. ⟨hal-00914039⟩
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