《万方数据-数字化期刊群》全文上网期刊
CNKI《中国学术期刊(网络版)》全文收录期刊
《中文科技期刊数据库》(维普网)全文收录期刊
超星期刊域出版平台、博看网全文收录期刊
日本科学技术振兴机构数据库收录

基于STFT的最大预示环境波形重构新方法

邱伟, 师培峰, 任燕, 樊孝春

邱伟, 师培峰, 任燕, 樊孝春. 基于STFT的最大预示环境波形重构新方法[J]. 航天器环境工程, 2016, 33(1): 42-45 DOI: 10.12126/see.2016.01.007
引用本文: 邱伟, 师培峰, 任燕, 樊孝春. 基于STFT的最大预示环境波形重构新方法[J]. 航天器环境工程, 2016, 33(1): 42-45 DOI: 10.12126/see.2016.01.007
Qiu Wei, Shi Peifeng, Ren Yan, Fan Xiaochun. A new waveform reconstruction method based on STFT in the maximum expectant environment[J]. Spacecraft Environment Engineering, 2016, 33(1): 42-45. DOI: 10.12126/see.2016.01.007
Citation: Qiu Wei, Shi Peifeng, Ren Yan, Fan Xiaochun. A new waveform reconstruction method based on STFT in the maximum expectant environment[J]. Spacecraft Environment Engineering, 2016, 33(1): 42-45. DOI: 10.12126/see.2016.01.007

基于STFT的最大预示环境波形重构新方法

详细信息
  • 中图分类号: V416.2

A new waveform reconstruction method based on STFT in the maximum expectant environment

  • 摘要: 振动过程的最大预示环境(MEE)是指在某个关心的结构区域内,通过测量或预示手段获得的以谱形式表示的振动环境数据保守极限。然而,很多振动试验方法,特别是用振动台模拟低频瞬态环境时(低于100 Hz),需要给出试验信号的参考波形。文章结合振动模拟试验及短时傅里叶变换(STFT)时频分析,提出一种振动过程最大预示波形(MEW)的重构新方法。数值仿真结果表明,与传统方法相比,使用新方法重构的MEW误差更小,且试验控制更加灵活、高效,更适合于工程应用。
    Abstract: The maximum expectant environment(MEE) of a vibration process means that in an area of a structure, the conservative limit of the vibration environmental data is obtained in the form of a spectrum by measurement or prediction methods. However, for many test methods, especially when the vibration table is used to simulate the low frequency transient environment (with frequency less than 100 Hz), the test reference signal waveforms have to be given. Based on the MEE of the vibration process besides the time and frequency analysis, a new method is proposed to reconstruct rapidly the maximum expectant environmental waveform(MEW) in the vibration simulation test. The numerical simulation results show that the error of the calculations by the new method is reduced, and the control is more flexible and efficient as compared with the traditional method, thus the new waveform reconstruction method can be used in the vibration environment test.
  • [1]

    Hughes W O, McNelis A M, Himelblau H. Investigation of acoustic fields for the Cassini spacecraft:reverberant versus launch environments[C]//5th AIAA/CEAS Aeroacoustics Conference and Exhibit. Bellevue, WA, 1999:1193-1203

    [2]

    Wilby J F, Piersol A G. Analytical prediction of aerospace vehicle vibration environments, ASME Paper 81-DET-29[R], 1981

    [3]

    Scharton T D. Force limited vibration testing monograph, NASA Reference Publication RP-1403[R], 1997

    [4]

    Quyang X, Amin M. Short-time Fourier transform receiver for nonstationary interference excision in direct sequence spread spectrum communication[J]. IEEE Trans on Signal Proc, 2001, 49(4):851-863

    [5] 李亚安, 王军. 自适应核时频分布在抑制交叉项中的应用[J]. 系统工程与电子技术, 2004, 26(11):1567-1569 Li Ya'an, Wang Jun. Application of adaptive kernel time-frequency distribution in cross-components suppression[J]. System Engineering and Electronics, 2004, 26(11):1567-1569
    [6] 张资达. 现代信号处理[M]. 北京:清华大学出版社, 2002:1-528
    [7]

    Worth D B. A method for implementing force-limited vibration control[J]. Journal of the Institute of Environment Sciences, 1997, 16(4):34-41

计量
  • 文章访问数:  11006
  • HTML全文浏览量:  2
  • PDF下载量:  15884
  • 被引次数: 0
出版历程
  • 收稿日期:  2015-04-06
  • 修回日期:  2016-01-14
  • 发布日期:  2016-02-29

目录

    /

    返回文章
    返回