航天器环境工程2018，Vol.35Issue(2)：135-140,6.DOI:10.3969/j.issn.1673-1379.2018.02.006
基于局域均值分解的冲击响应谱时域波形合成新方法
A new method for time domain waveform synthesis of shock response spectrum based on local mean decomposition
师培峰 1邱伟 1王振田 1吴瑞斌 1陈柯勋 1王晓斌1
作者信息
摘要
Abstract
The technique of time domain waveform synthesis of shock response spectrum is an important approach to simulate the complex shock environment in laboratory. The measured time domain waveform is decomposed by the local mean decomposition (LMD) method, and a set of PF signal components with different frequency distributions are obtained based on the LMD and the time domain waveform synthesis of the shock response spectrum. Then, a new set of PF signal components is reconstructed by using the data clustering analysis method for reconstructing the prior PF signal components. The frequency-amplitude characteristics of the new PF signal components are made to be consistent with the set of the shock response spectrum test conditions. The impulse signal can therefore be reconstructed by properly combining the reconstructed signal components. Simulation results show that the time domain waveform obtained from the shock response spectrum generated by the new method based on the LMD method can well represent the real shock environment, and the shock response spectrum has a good control accuracy.关键词
冲击响应谱/局域均值分解/波形合成/聚类分析/数值仿真Key words
shock response spectrum (SRS)/local mean decomposition (LMD)/waveform synthesis/data clustering analysis/numerical simulation分类
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师培峰,邱伟,王振田,吴瑞斌,陈柯勋,王晓斌..基于局域均值分解的冲击响应谱时域波形合成新方法[J].航天器环境工程,2018,35(2):135-140,6.
