奇异谱分解在超声速无人机声振试验数据处理中的应用

刘鎏;闫云聚;李鹏博

振动与冲击 ›› 2015, Vol. 34 ›› Issue (3) : 28-34.

PDF(2285 KB)
PDF(2285 KB)
振动与冲击 ›› 2015, Vol. 34 ›› Issue (3) : 28-34.
论文

奇异谱分解在超声速无人机声振试验数据处理中的应用

  • 刘鎏,闫云聚,李鹏博
作者信息 +

Singular Value Spectrum Decomposition and Its Application to the acoustic vibration test parameters’ processing of supersonic aircraft

  • Liu Liu Yan Yunju Li Pengbo Zhang Guojun
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文章历史 +

摘要

将相空间重构和奇异谱分解相结合对受强气动噪声影响的超声速飞行器测试数据进行滤波,以实现对于试验参数的精确识别。首先通过数值仿真论证该方法的可行性,然后针对某型超声速无人机的声振试验对试验采集数据进行相空间重构,并对重构后的轨迹矩阵进行奇异值分解,得到反映真实信号信息的信号子空间和反映噪声信息的噪声子空间。通过定义奇异值差分谱这一指标来判定真实信号信息子空间维数,并针对现有最大差分谱理论缺陷提出了优选差分谱峰值理论,利用奇异谱分解的逆过程对真实信号进行重构。重构结果表明,该方法适用于超声速飞行下的飞行器声振试验数据处理,为超声速飞行器飞行状态的精确描述提供了良好的思路。

Abstract

In order to realize the precise identification of the acoustic vibration test parameters about the supersonic aircraft, a new filtering method combining phase space reconstruction and singular spectrum decomposition is proposed. Firstly, feasibility of this method is demonstrated through numerical simulation. Secondly, in order to separate the signal subspace and the noise subspace, phase space reconstruction of the test parameters is processed, and the attractor track matrix is also decomposed with singular value decomposition (SVD). Finally, aiming at the shortage of the maximum difference spectrum theory, the concept of optimizing difference spectrum theory is given, and reconstruction is proposed on the basis of the peak position of the optimizing difference spectrum. Reconstruction results show that the proposed method is suitable for processing the acoustic vibration test data of the supersonic aircraft, providing a solution for the precise description of the supersonic aircraft flying state.

 

 

 

关键词

相空间重构 / 奇异值分解 / 超声速 / 声振试验 / 信号滤波

Key words

phase space reconstruction / singular value decomposition / supersonic / acoustic vibration test / signal processing

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导出引用
刘鎏;闫云聚;李鹏博. 奇异谱分解在超声速无人机声振试验数据处理中的应用[J]. 振动与冲击, 2015, 34(3): 28-34
Liu Liu Yan Yunju Li Pengbo Zhang Guojun. Singular Value Spectrum Decomposition and Its Application to the acoustic vibration test parameters’ processing of supersonic aircraft[J]. Journal of Vibration and Shock, 2015, 34(3): 28-34

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