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• W2023340018 abstract "Stochastic resonance (SR) is an important approach to detect weak vibration signals from heavy background noise. In order to increase the calculation speed and improve the weak feature detection performance, a new bistable model has been built. With this model, an adaptive and fast SR method based on dyadic wavelet transform and least square system parameters solving is proposed in this paper. By adding the second-order differential item into the traditional bistable model, noise utilization can be increased and the quality of SR output signal can be improved. The iteration algorithm for implementing the adaptive SR is given. Compared with the traditional adaptive SR method, this algorithm does not need to set up the searching range and searching step size of the system parameters, but only requires a few iterations. The proposed method, discrete wavelet transform and the traditional adaptive SR method are applied to analyzing simulated vibration signals and extracting the fault feature of a rotor system. The contrastive results verify the superiority of the proposed method, and it can be effectively applied to weak mechanical fault feature extraction." @default.
• W2023340018 created "2016-06-24" @default.
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• W2023340018 date "2014-12-01" @default.
• W2023340018 modified "2023-10-01" @default.
• W2023340018 title "Adaptive bistable stochastic resonance and its application in mechanical fault feature extraction" @default.
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• W2023340018 doi "https://doi.org/10.1016/j.jsv.2014.08.039" @default.
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