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Bandstop filtering for interference removal in bearing fault detection

Interference components in the faulty bearing signals have been one of the major obstacles in detecting bearing faults featuring weak impulses in the vibration signals. This paper reports a band stop (BS) method to remove such interferences. The BS method is composed of two window merging schemes to identify the interference frequency bands and to preserve fault frequency bands. Our simulation analysis has shown that the proposed method compares favorably with several existing methods. Its effectiveness in bearing fault detection has also been demonstrated using experimental data.