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Nonlinear optimal control and synchronization for chaotic electronic circuits

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Abstract

To achieve control and synchronization of chaotic electronic circuits, a nonlinear optimal (H-infinity) control method is developed and is tested on Chua’s circuit. Although this electronic circuit is deterministic, for specific values of its parameters its phase diagrams may change in a random-like manner, thus exhibiting a chaotic behavior. In the article’s control approach, an approximate linearization procedure is applied first to the dynamic model of the circuit. The linearization takes place around a temporary operating point which is recomputed at each iteration of the control method. It actually uses Taylor series expansion and the computation of the system’s Jacobian matrices. At a next stage, an H-infinity feedback controller is developed for the approximately linearized model of the circuit. This controller is obtained after solving an algebraic Riccati equation at each time step of the control method. To prove the stability properties of the control scheme and the elimination of the synchronization error, Lyapunov analysis is used. The proposed control scheme is demonstrated to satisfy the H-infinity tracking performance condition, and this indicates elevated robustness against model uncertainty and external perturbations. Moreover, the global asymptotic properties of the control method are proven. Finally, under the proposed nonlinear optimal control approach, it is shown that different Chua’s circuits can get synchronized and that chaotic behavior can be replicated by them.

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Authors and Affiliations

  1. Unit of Industrial Automation, Industrial Systems Institute, 26504, Rion, Patras, Greece

    G. Rigatos

  2. General Electric, GE Global Research, Niskayuna, NY, 12309, USA

    M. Abbaszadeh

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  1. G. Rigatos
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  2. M. Abbaszadeh
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Rigatos, G., Abbaszadeh, M. Nonlinear optimal control and synchronization for chaotic electronic circuits. J Comput Electron 20, 1050–1063 (2021). https://doi.org/10.1007/s10825-021-01655-1

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  • DOI: https://doi.org/10.1007/s10825-021-01655-1

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