MODAL PARAMETERS EXTRACTION WITH CROSS- CORRELATION FUNCTION AND CROSS-POWER SPECTRUM UNDER UNKNOWN EXCITATION

ZHENG Min; SHEN Fan; CHEN Huai-hai

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MODAL PARAMETERS EXTRACTION WITH CROSS- CORRELATION FUNCTION AND CROSS-POWER SPECTRUM UNDER UNKNOWN EXCITATION

机译：未知激发下具有互相关函数和跨功率谱的模态参数提取

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In most of real operational conditions only response data are measurable while the actual excitations are unknown, so modal parameter must be extracted only from responses. This paper gives a theoretical formulation for the cross-correlation functions and cross-power spectra between the outputs under the assumption of white-noise excitation. It widens the field of modal analysis under ambient excitation because many classical methods by impulse response functions or frequency re- sponse functions can be used easily for modal analysis under unknown excitation.

机译：在大多数实际运行条件下，仅可测量响应数据，而实际激励未知，因此只能从响应中提取模态参数。本文为白噪声激励下的输出之间的互相关函数和互功率谱提供了理论公式。它扩展了环境激励下的模态分析领域，因为许多基于脉冲响应函数或频率响应函数的经典方法可以轻松地用于未知激励下的模态分析。

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《Chinese journal of aeronautics》 |2000年第1期|p.19-23|共5页
作者
ZHENG Min; SHEN Fan; CHEN Huai-hai;
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原文格式 PDF
正文语种 eng
中图分类航空;
关键词
modal analysis; cross-correlation function; cross-power spectrum;

机译：模态分析互相关函数交叉功率谱;

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1. MODAL PARAMETERS EXTRACTION WITH CROSS-CORRELATION FUNCTION AND CROSS-POWER SPECTRUM UNDER UNKNOWN EXCITATION [J] . 中国航空学报（英文版） . 2000,第001期

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机译：基于自然激励响应数据的模态参数提取

MODAL PARAMETERS EXTRACTION WITH CROSS- CORRELATION FUNCTION AND CROSS-POWER SPECTRUM UNDER UNKNOWN EXCITATION

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