摘要
利用三阶谱对高斯噪声不敏感的特点,本文提出一种频响函数新的估计方法。理论分析、数字仿真及实物试验结果表明,在零均值高斯噪声干扰下,新估计比现有的等更接近真值。
A new approach to estimate frequency response function (FRF) is proposed in this paper. We will demonstrate this through utilizing the feature that the third order spectrum is insensitive to Gaussian white noise (GWN) via the analysis of the third order spectrum. Theoretical analysis and results of digital simulation and specimen test show that this estimate, H_b, is more approximate to the true value of FRF than other existing estimates. H_1, H_2 H_3, H_v under the contamination of GWN with a zero-mean value.
出处
《振动与冲击》
EI
CSCD
北大核心
1992年第4期29-35,共7页
Journal of Vibration and Shock
