| 基于参数模型的频响函数估计方法 |
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| 引用本文： | 曹坚.基于参数模型的频响函数估计方法[J].振动．测试与诊断,2011,31(1):70-73. |
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| 作者姓名： | 曹坚 |
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| 作者单位： | 广西工业职业技术学院机械系,南宁,530003 |
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| 摘 要： | 针对传统的非参数频响函数估计方法不适用于短记录数据的情况,提出了一种基于公分母模型的参数化频响函数估计方法.该方法使用输入输出信号的快速傅里叶变换(输入输出谱)作为主要数据,通过最小二乘法求解参数,利用奇异熵技术对系统进行定阶.最后采用一个二层框架的仿真算例对所提出的算法进行了验证.仿真算例结果表明,通过响应信号的奇异...
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| 关 键 词： | 频响函数估计 参数化估计模型 短记录数据 输入输出谱 奇异熵 |
| 收稿时间： | 2009/5/25 0:00:00 |
| 修稿时间： | 2009/8/3 0:00:00 |
Estimation of Frequency Response Function Using Parameter Model |
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| Cao Jian.Estimation of Frequency Response Function Using Parameter Model[J].Journal of Vibration,Measurement & Diagnosis,2011,31(1):70-73. |
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| Authors: | Cao Jian |
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| Affiliation: | Cao Jian(Mechanical Department,Guangxi Vocational Technical Institute of Industry Nanning,530003,China) |
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| Abstract: | If the test data is a short data sequence,it is not suitable to perform conventional non-parametric estimation of frequency response function(FRF). Aimed at the problems,a new FRF estimation using the parameterized model was presented.A common denominator transfer function model was employed and the input and output spectrums were used as the primary data.The parameters were solved by the least square estimator.The technology of singular entropy was adopted to determine the order of system.A simulation case... |
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| Keywords: | frequency response function estimation parameterized estimation model short data sequence input and output spectrums singular entropy |
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