Abstract
The role of the number of breakpoints N in the sawtooth form of the characteristic function in the modified Chua's circuit model equation on vibrational and ghost-vibrational resonances is investigated in this paper. To observe vibrational resonance, the system should be driven by two periodic forces of frequencies ω and Ω, with Ω ≫ ω. Resonance occurs at the frequency ω when the amplitude of the high-frequency force is varied. When the system is subjected to an input signal containing multifrequencies which are of higher-order than a certain (missing) fundamental frequency, then a resonance at the missing fundamental frequency is induced by the high-frequency input signal and is called ghost-vibrational resonance. In both types of resonances, the number of resonances is N and hysteresis occurs in each resonance region. There are some similarities and differences in these two resonance phenomena. We report in detail the influence of the role of number of breakpoints N on the features of vibrational and ghost-vibrational resonances.
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