RESEARCH PAPER
Hybrid Passivity Based and Fuzzy Type-2 Controller for Chaotic and Hyper-Chaotic Systems
1
Central American Technical University (UNITEC), Tegucigalpa, Zona Jacaleapa, Honduras
2
Department of Mathematics, Universitat Politècnica de Catalunya (UPC), Av. Bases de Manresa, 61-73 , 08242-, Manresa, Spain
Submission date: 2016-01-06
Acceptance date: 2017-05-12
Online publication date: 2017-06-15
Publication date: 2017-06-01
Acta Mechanica et Automatica 2017;11(2):96-103
KEYWORDS
ABSTRACT
In this paper a hybrid passivity based and fuzzy type-2 controller for chaotic and hyper-chaotic systems is presented. The proposed control strategy is an appropriate choice to be implemented for the stabilization of chaotic and hyper-chaotic systems due to the energy considerations of the passivity based controller and the flexibility and capability of the fuzzy type-2 controller to deal with uncertainties. As it is known, chaotic systems are those kinds of systems in which one of their Lyapunov exponents is real positive, and hyper-chaotic systems are those kinds of systems in which more than one Lyapunov exponents are real positive. In this article one chaotic Lorentz attractor and one four dimensions hyper-chaotic system are considered to be stabilized with the proposed control strategy. It is proved that both systems are stabilized by the passivity based and fuzzy type-2 controller, in which a control law is designed according to the energy considerations selecting an appropriate storage function to meet the passivity conditions. The fuzzy type-2 controller part is designed in order to behave as a state feedback controller, exploiting the flexibility and the capability to deal with uncertainties. This work begins with the stability analysis of the chaotic Lorentz attractor and a four dimensions hyper-chaotic system. The rest of the paper deals with the design of the proposed control strategy for both systems in order to design an appropriate controller that meets the design requirements. Finally, numerical simulations are done to corroborate the obtained theoretical results.
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| eISSN: | 2300-5319 |
| ISSN: | 1898-4088 |
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