Identification of Nonlinear Vibration System by Bispectrum Analysis.
Identification of Nonlinear Vibration System by Bispectrum Analysis.
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通过双谱分析识别非线性振动系统。
DOI：
10.1299/kikaic.61.3184
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Shinji Yamakawa
中科院分区：
文献类型：
--
作者：
H. Matsumoto;Shinji Yamakawa
作者在本文中提出了一种统计方法，用高阶谱 (HOS) 来识别遭受随机振动的非线性系统。作者首先计算输入和输出信号的自双谱和交叉双谱，然后估计基波的幅度以及它们之间的相位关系。最终从这些幅度和相位关系中获得代表非线性恢复力和阻尼力的多项式系数。数学表达式管理程序“REDUCE”用于确定系数之间的相互关系。这些分析是在模拟数据上执行的。
The authors propose in this paper a statistical method to identify nonlinear systems subjected to random vibration with the higher-order spectra (HOS). The authors calculate autobispectra and crossbispectra of input and output signals first, and then estimate amplitudes of the fundamentals and phase relations between them. Coefficients of polynomials which represent nonlinear restoring and damping forces are finally obtained from those amplitudes and phase relations. A mathematical expression management program "REDUCE" is used to determine mutual relationships among the coefficients. These analyses are executed on simulation data.