Model order determination and noise removal for modal parameter estimation
Model order determination and noise removal for modal parameter estimation
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模态参数估计的模型阶数确定和噪声消除
DOI:
10.1016/j.ymssp.2010.01.005
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发表时间:
2010-08
影响因子:
8.4
通讯作者:
Li, Huajun
中科院分区:
文献类型:
--
作者:
Hu, Sau-Lon James;Bao, Xingxian;Li, Huajun
Given a noisy impulsive response function (IRF) that has been contributed by an unknown number of modes, this article proposes a different approach from the traditional methods for estimating modal parameters from this noisy IRF. The major difference lies in the way of handling noise and choosing the computational model order. Whereas the traditional approach accommodates noise by purposely increasing the computational model order, the proposed approach uses the actual system order as the computational model order and rejects noise prior to performing the modal parameter estimation. The proposed approach includes three steps: (1) model order (or number of modes) determination from the measured IRF—by finding the rank of a Hankel matrix constructed from the measured IRF, (2) noise removal from the measured IRF to obtain a filtered IRF—by implementing Cadzow's algorithm for the structured low rank approximation (SLRA) on the Hankel matrix, and (3) modal parameters estimation from the filtered IRF—by using the complex exponential method (Prony's method). Numerical studies include both synthesized and experimental data. While measured IRFs with mild and strong noise levels are simulated for a 5 degree-of-freedom mass-spring-dashpot system, the modal parameter estimations based on the filtered IRFs are very good for both noise levels. While experimental data are measured from two accelerometers mounted at a cantilever beam, the modal parameters estimated from the filtered IRFs of the two accelerometers are in excellent agreement.
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影响因子:
4.4
作者:
Markovsky, Ivan;Van Huffel, Sabine
通讯作者:
Van Huffel, Sabine
DOI:
10.1201/9780429493393
发表时间:
2018-12
期刊:
--
影响因子:
--
作者:
Mohamed Ismail;M. Hessein
通讯作者:
Mohamed Ismail;M. Hessein
DOI:
10.1109/78.330370
发表时间:
1994-11
期刊:
IEEE Trans. Signal Process.
影响因子:
--
作者:
B. Moor
通讯作者:
B. Moor
DOI:
10.1109/78.212753
发表时间:
1993-04
期刊:
IEEE Trans. Signal Process.
影响因子:
--
作者:
D. Tufts;A. A. Shah-A.
通讯作者:
D. Tufts;A. A. Shah-A.
DOI:
10.1109/29.1488
发表时间:
1988-01-01
期刊:
IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING
影响因子:
--
作者:
CADZOW, JA
通讯作者:
CADZOW, JA