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Published on: May 29, 2014
Subharmonic transitions in a bistable oscillator with bimodal periodic excitation
1Russian Academy of Sciences, Space Research Institute, Moscow 117997, Russia.
Abstract:
We analyze the phenomenon of low-frequency signal enhancement in a bistable system excited by a sum of low-frequency and high-frequency harmonic signals. A mechanism alternate to chaotic resonance is discussed. It is shown that a high-frequency signal may generate interwell transitions of subharmonic frequency. If the frequency of the slow signal is equal or close to a subharmonic frequency of the fast signal, then the improvement of the low-frequency constituent in the output spectrum is due to sustained subharmonic resonance.
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