Xi'an Jiaotong University

Jiahui Cao

Xuefeng Chen

Laihao Yang

Shaohua Tian

Zhibo Yang

Haoqi Li

Wenbo Li

Zengkun Wang

The present disclosure discloses a method for extracting a natural frequency difference between blades by a single blade tip timing sensor or uniformly distributed blade tip timing sensors. The method includes the following steps: acquiring actual arrival time of a rotating blade by using a single blade tip timing sensor or uniformly distributed blade tip timing sensors, and converting a difference between theoretical arrival time and the actual arrival time into displacement data of a blade tip according to a rotational speed and a blade length of the rotating blade; selecting displacement data of blade tips of two rotating blades with the same blade length at the same rotational speed; intercepting the displacement data, performing discrete Fourier transform respectively, and making a sampling frequency approximate to an average rotational speed to obtain spectrum data.

Method for extracting natural frequency difference between blades by single blade tip timing sensor or uniformly distributed blade tip timing sensors

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Shaanxi, China

Jiahui Cao