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An adaptive underdamped stochastic resonance based on NN and CS for bearing fault diagnosis

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Abstract

Bearing is very important for rotating machinery, whose faults even cause the fatal accident. However, the fault-induced impulses, which are in the vibration data, are too weak to be detected. To enhance the weak impulses and detect the bearing fault, a novel adaptive underdamped stochastic resonance (AUSR) based on neural network (NN) and cuckoo search algorithm (CS) called NNCS-AUSR is proposed. In the proposed method, local signal-to-noise ratio (LSNR) is used to evaluate the AUSR output, NN to predict the range of the integral step that is one of AUSR parameters, and CS to search the optimal AUSR parameters. To verify the proposed method, bearing fault signals under different fault types, different fault levels and different motor loads are analyzed. Adaptive overdamped stochastic resonance based on CS (CS-AOSR) and AUSR based on CS (CS-AUSR) and are also used for comparison. The results show that NNCS-AUSR enhances the weak fault-induced impulses under various conditions more effectively and takes less time than CS-AOSR and CS-AUSR.

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Abbreviations

AOSR:

Adaptive overdamped bi-stable SR

AUSR:

Adaptive underdamped bi-stable SR

CS:

Cuckoo search algorithm

CS-AOSR:

Adaptive overdamped bi-stable SR based on CS

CS-AUSR:

Adaptive underdamped bi-stable SR based on CS

GWN:

Gaussian white noise

LE:

Langevin equation

LSNR:

Local signal-to-noise ratio

NN:

Neural network

NNCS-AUSR:

Adaptive underdamped bi-stable SR based on NN and CS

OBSR:

Overdamped bi-stable SR

SR:

Stochastic resonance

UBSR:

Underdamped bi-stable SR

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Acknowledgements

This research is partially supported by the National Natural Science Foundation of China (No. 71701038).

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Correspondence to Fei Zhao.

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Chi, K., Kang, J., Zhao, F. et al. An adaptive underdamped stochastic resonance based on NN and CS for bearing fault diagnosis. Int J Syst Assur Eng Manag 10, 437–452 (2019). https://doi.org/10.1007/s13198-019-00816-7

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  • DOI: https://doi.org/10.1007/s13198-019-00816-7

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