中国空间科学技术

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基于小波方法的挠性空间结构模态参数的辨识

刘一武,张洪华,吴宏鑫   

  1. 北京控制工程研究所!北京100080,北京控制工程研究所!北京100080,北京控制工程研究所!北京100080
  • 发布日期:2001-08-25

Identification Based Wavelets for Closely Spaced Modes' Parameters of Flexible Space Structures

Liu Yiwu Zhang Honghua Wu Hongxin(Beijing Institute of Control Engineering,Beijing 100080)   

  • Online:2001-08-25
  • Supported by:
    国家自然科学基金重点项目 (60 0 3 4 0 1 0 );; 国防九五预研项目资助

摘要: 研究挠性空间结构密集模态参数的小波辨识方法。利用系统脉冲响应的小波变换 ,对挠性空间结构低频密集模态的频率、阻尼与增益参数进行辨识。当小波的分析频率较大时 ,小波变换具有分离密集低频的能力。仿真与实验验证了方法的有效性。

关键词: 挠性结构, 模态参数, 识别, 方法, 仿真试验

Abstract: An approach for identification of dense modes' parameters of flexible space structures is studied.Based on wavelet transformation of the system impulse response,when the selected wavelet's analysis frequency is enough high,the closely spaced low frequencies of flexible space structures can be accurately separated and mode parameters be estimated.Simulation results are given to demonstrate the effectiveness of the proposed approach.