Abstract
We report experimental control of complex (periodic and chaotic) oscillatory dynamics in an electrochemical system by applying a nonfeedback control method. By choosing an appropriate frequency for the periodic modulation of an accessible control parameter (e.g., circuit potential) not only are the chaotic dynamics converted to regular periodic behavior (controlling chaos) but also the character of the oscillatory dynamics is altered (for example, 11 → 10). This is different from previously reported experiments involving simple entrainment of oscillatory dynamics, since in our experiments the frequency of sinusoidal modulation is chosen such that the existing unstable dynamics are targeted and subsequently stabilized. Consequently, the maximum amplitude of the control signal is less than ±5% of its base value. Since resonant control strategy can be easily implemented without a complicated precontrol procedure it seems relevant for applications to real systems.
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