Single-sensor rotating blade monitoring method under non-stationary conditions based on velocity and displacement

• Published in: ISA transactions Vol. 152; pp. 385 - 407
• Main Authors: Bian, Zifang, Yang, Yongmin, Guan, Fengjiao, Hu, Haifeng, Shen, Guoji, Pan, Minghao
• Format: Journal Article
• Language: English
• Published: United States Elsevier Ltd 01.09.2024
• Subjects: Blade tip displacement; Blade tip vibration velocity; Non-stationary condition; Single sensor; Vibration parameters identification; Vibration parameters identification; Single sensor; Blade tip vibration velocity; Blade tip displacement; Non-stationary condition
• ISSN: 0019-0578; 1879-2022; 1879-2022
• DOI: 10.1016/j.isatra.2024.06.017

A novel single-sensor method for monitoring rotating blade vibration is proposed and utilized to identify vibration parameters under the non-stationary condition. By analyzing the pulse-signal waveform, the blade tip displacement and vibration velocity are extracted. Then, the motion equation under the non-stationary condition is further developed to provide a theoretical basis. Finally, the optimization technology is applied to extract vibration parameters. Compared with multiple-sensor methods, the proposed method has lower installation difficulty, less equipment cost, fewer sensors, and no strict sensor layout requirement. Numerical simulations and experiments are conducted to validate the effectiveness and robustness of the proposed method. The relative error in the natural frequency does not exceed 0.1 %. Additionally, errors in other parameters are less than 8 % in the experiment. •A novel single-sensor method is proposed to identify the vibration parameters of the blade under non-stationary condition.•A novel measurement approach is proposed, which is based on the blade tip vibration velocity (BTVV).•Dynamic characteristic of the non-stationary vibration is investigated by the theoretical analysis. And the formula expression of BTVV under non-stationary condition is first derived.•Simulations and the experiment are performed to validate the proposed method.