Spacecraft Micro⁃vibration Signal Processing Method Based on Symplectic Geometry Hilbert Transform

被引：0
|
作者：
Chen J. [1 ,2 ,3 ]
Zhang H. [1 ,2 ,3 ,4 ]
机构：
[1] National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing
[2] CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing
[3] University of Chinese Academy of Sciences, Beijing
[4] School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing
来源：
Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | 2023年 / 43卷 / 06期
关键词：
Hilbert; marginal spectrum; micro-vibration; spacecraft; Symplectic geometry;
D O I：
10.16450/j.cnki.issn.1004-6801.2023.06.004
中图分类号：
学科分类号：
摘要：
Symplectic geometry Hilbert transform（SGHT）is proposed to improve current methods for space⁃ craft micro-vibration signal process. This proposed method is based on symplectic geometry mode decomposi⁃ tion（SGMD）and Hilbert spectrum analysis（HSA）. Firstly，the eigenvalues of Hamilton matrix are solved by symplectic geometry similarity transformation and the single component signal can be reconstructed by corre⁃ sponding eigenvectors. Then，by calculating normalized mutual information，similar components are merged into Symplectic geometry component（SGC）and the input signal is subtracted from the calculated SGC compo⁃ nent to obtain a new input signal for the next round of iteration until the termination condition is satisfied. Fi⁃ nally，Hilbert transform is performed on each SGC to calculate the Hilbert marginal spectrum. The simulation results show that，the proposed SGHT method has better decomposition performance and processing ability un⁃ der the non-stationary complex micro-vibration signal，compared with the common micro-vibration signal pro⁃ cessing methods. Using SGHT method to process the advanced space-based solar observatory（ASO-S）/ full-disk vector magneto graph（FMG）ground micro-vibration test signals，SGC components can be identified and the estimated angular displacement envelope is less than 0.015，showing practical engineering significance for satellite and payload development. © 2023 Nanjing University of Aeronautics an Astronautics. All rights reserved."
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页码：1073 / 1080
页数：7
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