A modified phase space warping method for tracking damage evolution of rotating machineries

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (1) : 14-21.

NIU Qian YANG Shixi GAN Chunbiao

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Abstract

Monitoring in real time and tracking damage evolution of rotating mechanical systems can effectively reduce their operation risk and unnecessary maintenance costs to improve equipment efficiency.Here, based on the phase space warping theory and the periodic characteristic of rotating machineries, a modified damage-tracking method was proposed to reduce computation cost and tracking error of the original phase space warping method, and realize tracking the system’s damage evolution in real time.Numerical simulations and tests of cracked rotors and bearing degradation verified the effectiveness of the proposed method.The results showed that compared to the original phase space warping method, the computation time of the proposed method obviously decreases, the tracking result is more smooth and accurate, and the proposed method has a better distinguish ability for similar damage states.

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rotating machinery / damage evolution / phase space warping / damage tracking

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NIU Qian YANG Shixi GAN Chunbiao . A modified phase space warping method for tracking damage evolution of rotating machineries[J]. Journal of Vibration and Shock, 2019, 38(1): 14-21

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