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The vibrational resonance (VR) method is used to analyze the simulated and experimental vibration signals with different bearing faults. At first, we get the curve of the response amplitude at the characteristic frequency versus the amplitude of the auxiliary signal to obtain the VR phenomenon. Based on the curve, we obtain the optimal amplitude of the auxiliary signal which can induce the strongest...
The stochastic resonance (SR) phenomenon is investigated in a typical bistable system that excited by the bounded noise and the weak low-frequency signal simultaneously. Based on numerical simulations, the main results are obtained. The SR performance mainly depends on the mean frequency and is influenced by the randomness level of the bounded noise. It occurs when the mean frequency is much larger...
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