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Proceedings Paper

Blade synchronous vibration measurement based on tip-timing at constant rotating speed without once-per-revolution sensor
Author(s): Haotian Guo; Fajie Duan; Meng Wang
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Paper 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.

Paper Details

Date Published: 26 January 2016
PDF: 7 pages
Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 990311 (26 January 2016); doi: 10.1117/12.2211514
Show Author Affiliations
Haotian Guo, Tianjin Univ. (China)
Fajie Duan, Tianjin Univ. (China)
Meng Wang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 9903:
Seventh International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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