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26 January 2016 Blade synchronous vibration measurement based on tip-timing at constant rotating speed without once-per-revolution sensor
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Proceedings Volume 9903, Seventh International Symposium on Precision Mechanical Measurements; 990311 (2016) https://doi.org/10.1117/12.2211514
Event: Seventh International Symposium on Precision Mechanical Measurements, 2015, Xia'men, China
Abstract
In this article, a blade synchronous vibration measurement method based on tip-timing at constant rotating speed is presented. This method requires no once-per revolution sensor, which makes it more generally applicable, especially for high pressure compressors of the dual rotor engines. The vibration amplitude and engine order are identified with this method. The theoretical analysis is presented, and the least square method is utilized for vibration parameter identification. The method requires at least four tip-timing sensors if the Campbell diagram is previously known and five sensors if the Campbell diagram is unknown. The method has no strict requirement on the angles among sensors which facilitate the installation of the sensors in the measurement. In some special conditions the method will fail and these conditions are analyzed. Experiments are conducted on a high speed rotor with a fiber based tip-timing system, and the experimental results indicate that the theoretical analysis is correct and the method is feasible.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Haotian Guo, Fajie Duan, and Meng Wang "Blade synchronous vibration measurement based on tip-timing at constant rotating speed without once-per-revolution sensor", Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 990311 (26 January 2016); https://doi.org/10.1117/12.2211514
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