Mechanism of Amplifying Distortion at Low Frequencies in Vibration Meadurement

doi:10.12382/bgxb.2021.0508

Abstract

Abstract: The reason for the amplifying distortion of vibration power spectrum at low frequencies is analyzed. It is validated through Matlab simulation that the combination of low-frequency signals and a specific analysis method are the cause. The physical reason for low frequencies is analyzed, and it is proved through tests that the bad contacts of the circuit, overranged sensors, poor connection of detected structures or sensors, and unidirectional pulse of special structures may cause distortion. The simulation results fit well with the experimental ones.

Key words: vibrationmeasurement, lowfrequency, amplifyingdistortion, powerspectrum

CLC Number:

TB123

YANG Weiyuan, HU Junqi. Mechanism of Amplifying Distortion at Low Frequencies in Vibration Meadurement[J]. Acta Armamentarii, 2022, 43(10): 2679-2686.

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