Improved polyreference time domain method for modal identification using local or global noise removal techniques
Improved polyreference time domain method for modal identification using local or global noise removal techniques
复制标题
使用局部或全局噪声消除技术进行模态识别的改进多参考时域方法
DOI:
10.1007/s11433-011-4625-1
复制
发表时间:
2012-06
期刊:
影响因子:
--
通讯作者:
HuaJun Li
中科院分区:
文献类型:
--
作者:
Sau-Lon James Hu;Sau-Lon James Hu;XingXian Bao;XingXian Bao;HuaJun Li;HuaJun Li
Modal identification involves estimating the modal parameters, such as modal frequencies, damping ratios, and mode shapes, of a structural system from measured data. Under the condition that noisy impulse response signals associated with multiple input and output locations have been measured, the primary objective of this study is to apply the local or global noise removal technique for improving the modal identification based on the polyreference time domain (PTD) method. While the traditional PTD method improves modal parameter estimation by over-specifying the computational model order to absorb noise, this paper proposes an approach using the actual system order as the computational model order and rejecting much noise prior to performing modal parameter estimation algorithms. Two noise removal approaches are investigated: a “local” approach which removes noise from one signal at a time, and a “global” approach which removes the noise of multiple measured signals simultaneously. The numerical investigation in this article is based on experimental measurements from two test setups: a cantilever beam with 3 inputs and 10 outputs, and a hanged plate with 4 inputs and 32 outputs. This paper demonstrates that the proposed noise-rejection method outperforms the traditional noise-absorption PTD method in several crucial aspects.
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DOI:
--
发表时间:
1994
期刊:
--
影响因子:
--
作者:
莊哲男
通讯作者:
莊哲男
影响因子:
4.4
作者:
Markovsky, Ivan;Van Huffel, Sabine
通讯作者:
Van Huffel, Sabine
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