Identification of the excitation source's circumferential position for rotating blades based on vibration phase

Niu, Guangyue; Duan, Fajie; Liu, Zhibo; Zhi, Fengyao; Fu, Xiao; Jiang, Jiajia; Guo, Guangsheng; Xiong, Bing

doi:10.1016/j.jsv.2021.116628

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…However, BTT is a severely undersampled measurement method, which provides great challenges for the parameters identification of vibration based on BTT. In order to extract blade vibration parameters from undersampled signals, parameters identification methods such as Circumferential Fourier Fitting (CFF) method, single-parameter method, double-parameter method, and spatial methods have been developed [8][9][10][11][12][13]. The CFF method is simple and requires less data, so it is widely used in engineering.…”

Section: Introductionmentioning

confidence: 99%

Parameters Identification of Blade Multi-mode Coupled Vibration Based on Blade Tip Timing

Zhi

Duan

Li³

et al. 2023

J. Phys.: Conf. Ser.

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Health monitoring is crucial for the safe operation of rotating machinery. As an effective technique for measuring the vibration of rotating blades, blade tip timing (BTT) is widely used since its advantages of non-contact and low intervention. During the operation of high-speed blades, the multi-mode coupled synchronous vibration will occur. However, the existing BTT-based methods cannot identify the multi-mode coupled vibration parameters. To solve the problem, a multi-mode coupled vibration model of the blade based on a slender cantilever beam is established, and the contribution of each mode to the blade vibration response is considered. A new Circumferential Fourier Fit (CFF) method for parameters identification of blade multi-mode coupled synchronous vibration is proposed. According to the proposed method, the reconstruction of multi-mode coupled synchronous vibration signals can be realized. Finally, the accuracy of the proposed method is verified by simulation data.

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