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| 航空发动机混叠振动信号的欠定盲源分离方法 |
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张 赟1,李本威1,贾舒宜2,王子斌3,孙 涛1,杨欣毅1
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(1. 海军航空工程学院 飞行器工程系,山东 烟台 264001;2. 海军航空工程学院 电子信息工程系,山东 烟台 264001;3. 海军装备航空技术保障部,北京 100074)
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| 摘要: |
| 针对传统欠定盲源分离方法难以有效处理具有时间延迟效应的发动机混叠振动信号分离问题,采用稀疏分量分析法研究了一种时间延迟混合信号的欠定盲源分离方法。该方法通过对混合信号的频域模值的线性聚类分析实现源数目及衰减矩阵的估计,并通过恢复混合信号的频域实部在混合空间的聚类性推断出时间延迟矩阵。实验结果表明,该方法在欠定条件下(传感器个数小于振动源个数)能够有效地将发动机混叠振动信号按照不同的激振源进行分离。 |
| 关键词: 欠定盲源分离 航空发动机 振动信号 时间延迟混合 |
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| 基金项目:军队科研基金项目(5130704023)。 |
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| Underdetermined Blind Source Separation of Aeroengine Vibration Signal Mixtures |
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ZHANG Yun, LI Ben-wei, JIA Shu-yi, WANG Zi-bin, SUN Tao, YANG Xin-yi
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(1. Department of Airborne Vehicle Engineering, Naval Aeronautical Engineering Institute, Yantai 264001, China;2. Department of Electronic and Information Engineering, Naval Aeronautical Engineering Institute, Yantai 264001, China;3. Department of Navy Aviation Technology Guarantee, Beijing 100074, China)
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| Abstract: |
| Aimed at the problem that the conventional underdetermined blind source separation (UBSS) methods are difficult to deal with the delayed aero-engine vibration mixture signals, an underdetermined blind source separation with delays was researched by using the sparse component analysis. The number of sources and attenuation matrix were estimated by clustering mixture signals magnitude on the line direction. The delay matrix was obtained by recovering the cluster of signals real. The experiment results show that the different vibration sources of aero-engine vibration mixture signals were separated effectively under the condition that the number of sensors is less than that of sources. |
| Key words: Underdetermined blind source separation Aero-engine Vibration signal Delayed mixture |
