| 多变量频域极大似然辨识算法研究 |
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| 引用本文： | 王永,李旺,梁青.多变量频域极大似然辨识算法研究[J].东南大学学报(自然科学版),2005(Z2). |
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| 作者姓名： | 王永 李旺 梁青 |
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| 作者单位： | 中国科学技术大学自动化系 合肥230027 |
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| 摘 要： | 提出了多变量频域极大似然辨识算法.在单变量频域极大似然辨识算法的基础之上,得出多变量系统的频域极大似然辨识算法,并且优化设计多正弦辨识输入信号.针对大型挠性结构的模型进行了仿真,验证了算法的有效性,同时仿真结果表明:对于挠性结构,多变量频域极大似然辨识算法是有效的,而且能够在较大的频宽、较低信噪比的情况下得到良好的辨识结果.
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| 关 键 词： | 多变量系统 极大似然法 频域辨识 挠性结构 |
Multivariable system identification using maximum likelihood method in the frequency domain |
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| Wang Yong Li Wang Liang Qing.Multivariable system identification using maximum likelihood method in the frequency domain[J].Journal of Southeast University(Natural Science Edition),2005(Z2). |
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| Authors: | Wang Yong Li Wang Liang Qing |
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| Abstract: | The algorithm of maximum likelihood identification of single-variable systems in the frequency domain was extended to multivariable systems,and the new multivariable system identification is obtained using maximum likelihood method in the frequency domain.Moreover,the multisine input signals were optimized in the simulation,in which the model of a large flexible structure is identified and the validity of this algorithm is also verified.The results of simulations indicate: multivariable maximum likelihood system identification is valid for flexible structure,and good results can be gained even when the bandwidth is wide and SNR(signal to noise ratio) is low. |
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| Keywords: | multivariable system maximum likelihood method frequency-domain system identification flexible structures |
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