Three variants of narrowband coupling between two Chua's oscillators are considered. The oscillators are coupled via a device containing an oscillatory circuit and a resistor connected in series. Equations describing the processes in oscillators symmetrically through their oscillatory circuits and nonlinear elements and equations describing nonsymmetrically coupled oscillators are presented. Interaction of oscillations in the slightly detuned oscillators (subsystems) is numerically investigated. Chaotic oscillations excited in the coupled system and controlled by an external harmonic signal are analyzed.
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