Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (8): 1818-1824.doi: 10.16182/j.issn1004731x.joss.20-0267

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A Signal Decomposition Method Based on Multi-Layer Iteration Structured Singular Spectrum Analysis

Wei Yumiao1, Zhang Zhili1, Li Hongguang2, Li Shuqing2   

  1. 1. Rocket Force University of Engineering, Xi'an 710025, China;
    2. Unit 92786 of the Chinese PLA, Hanzhong 723000, China
  • Received:2020-05-21 Revised:2020-06-29 Published:2021-08-19

Abstract: To process the complex signals with concentrated frequency distribution, an adaptive decomposition method based on singular spectrum analysis with multi-layer iteration structure is researched. The traditional singular spectrum analysis is improved by frequency band subdivision and iterative filtering approach. A high-precision decomposition algorithm base on recursive structure is therefore designed, solving the problems such as insufficient adaptive capability and unsatisfied decomposition. Simulation results show that adaptive decomposition capability of the proposed method is effectively enhanced. For the multi-mode vibration signal with 0.2% ratio of spitting frequency to center frequency, the components are all accurately extracted, and consistent well with the theoretical value.

Key words: singular spectrum analysis, multi-layer iteration, adaptive decomposition, multi-mode vibration

CLC Number: