期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 200, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2023.110552
关键词
Spectrum reconstruction; Periodic nonuniform sampling; Delay sampling criterion; Minimal probe number; Sub-Nyquist; Blade tip timing
Rotating blades in turbomachinery play a functional role, but they are prone to failure due to harsh working conditions. Blade tip timing (BTT) is a potential technique for blade health monitoring, but the nonuniform and undersampling characteristics of the BTT signal challenge signal processing.
Rotating blades play a functional role during the working process of turbomachinery, but they are prone to failure due to harsh working conditions. Blade tip timing (BTT) is a potential technique for operational blade health monitoring due to its noncontact feature and efficiency. The critical issue in the application of BTT is extracting vibration parameters or reconstructing the spectrum for subsequent fault diagnosis. However, the nonuniform and undersampling characteristics of the BTT signal challenge signal processing. In this work, we developed an effective and efficient time delay-based spectrum reconstruction method. On this basis, we proposed the conditions (minimal probe number and delay sampling criterion) for the spectrum reconstruction. The proposed reconstruction conditions apply to most BTT methods for parameter identification or spectrum reconstruction and provide guidance for BTT measurement. Finally, the effectiveness of the proposed method and the correctness of the reconstruction conditions were demonstrated by a series of simulations and experiments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据