| 单传感叶端定时信号固有频率动态提取方法 |
| Dynamic extraction method for natural frequency of single⁃probe blade based tip timing signal |
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| 中文摘要: |
| 为解决叶端定时采样信号的欠采样问题并应对传感器的局限性，提出了一种使用单传感器测量数据的叶片固有频率提取方法，通过构造多种虚拟信号将测量信号进行频移，提取动态变化信号的频率成分，结合先验信息提取叶片的固有频率信息。基于仿真和实验验证了该方法在固有频率提取上的有效性和准确性，同时展示了其在小样本数据处理上的潜力。该方法仅使用一支叶端定时传感器，克服了传感器布局的限制，在传感器使用数量最低的情况下，解决了欠采样带来的频率混叠问题，有望为航空发动机转子叶片在线监测提供技术支持。 |
| 英文摘要: |
| To address the under?sampling issue in blade tip?timing signals and overcome probe limitations, a novel method for extracting blade natural frequencies using single?sensor measurement data is proposed. By constructing multiple virtual signals to frequency?shift the measured signal, the frequency components of dynamically varying signals are extracted, and the natural frequency information of the blades is retrieved in conjunction with prior knowledge. Simulation and experimental results validated the effectiveness and accuracy of this method in natural frequency extraction, and also demonstrated the potential for processing small?sample data. This approach uses only a single blade tip?timing probe, overcoming the restrictions in probe placement. With the minimum number of probes, it resolves the frequency aliasing caused by under?sampling, offering the promising technical support for online monitoring of rotor blades in aero?engines. |
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| 中文关键词: 单传感 叶端定时 欠采样 频谱混叠 叶片健康监测 |
| 英文关键词:single⁃probe blade tip timing under⁃sampling frequency aliasing blade health monitoring |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2024.05.02 |
| 引用本文：胡华辉, 杨志勃, 金若尘, 杨来浩, 田绍华.单传感叶端定时信号固有频率动态提取方法[J].计测技术,2024,44(5):. |
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