| 用FFT和现代控制论方法恢复地面位移 |
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| 引用本文： | 李鸿吉.用FFT和现代控制论方法恢复地面位移[J].地球物理学报,1992,15(1):37-43. |
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| 作者姓名： | 李鸿吉 |
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| 作者单位： | 国家地震局地球物理研究所 北京 100081 |
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| 摘 要： | 直接使用FFT由数字地震记录来恢复地面位移可能产生包括虚假的长周期分量在内的不正确结果.本文介绍了根据FFT和现代控制论所建立起来的迭代方法.对FFT和所介绍的迭代方法所给出的恢复结果进行比较表明,本文所提出的方法确实改善了地面位移的估计.
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| 关 键 词： | 位移 数字地震记录 传递函数 FFT 现代控制论 |
| 收稿时间： | 1990-07-30 |
DETERMINATION OF THE GROUND DISPLACEMENT USING FFT AND MODERN CONTROL ENGINEERING |
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| LI HONG-JI.DETERMINATION OF THE GROUND DISPLACEMENT USING FFT AND MODERN CONTROL ENGINEERING[J].Chinese Journal of Geophysics,1992,15(1):37-43. |
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| Authors: | LI HONG-JI |
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| Institution: | Institute of Geophysics, State Seismological Bureau, Beijing 100081 |
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| Abstract: | It is possible to yield incorrect results including false long period components, during the restitution of the ground displacement from digital seismograms directly using FFT. An iteration technique based on FFT and modern control engineering is presented. Comparing the recovered results of FFT with the displacement obtained by the iteration method shows that the approach proposed in this paper indeed improves the estimation of the ground displacement. |
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| Keywords: | Displacement Digital seismogram Transfer function FFT Modern con-trol engineering |
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