标题：
Control method for multi-input multi-output non-Gaussian random vibration test with cross spectra consideration
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所属单位：
航空学院
发表刊物：
CHINESE JOURNAL OF AERONAUTICS
关键字：
Cross spectra Kurtosis control Multi-input multi-output Non-Gaussian Random vibration test
摘要：
A control method for Multi-Input Multi-Output (MIMO) non-Gaussian random vibration test with cross spectra consideration is proposed in the paper. The aim of the proposed control method is to replicate the specified references composed of auto spectral densities, cross spectral densities and kurtoses on the test article in the laboratory. It is found that the cross spectral densities will bring intractable coupling problems and induce difficulty for the control of the multi output kurtoses. Hence, a sequential phase modification method is put forward to solve the coupling problems in multi-input multi-output non-Gaussian random vibration test. To achieve the specified responses, an improved zero memory nonlinear transformation is utilized first to modify the Fourier phases of the signals with sequential phase modification method to obtain one frame reference response signals which satisfy the reference spectra and reference kurtoses. Then, an inverse system method is used in frequency domain to obtain the continuous stationary drive signals. At the same time, the matrix power control algorithm is utilized to control the spectra and kurtoses of the response signals further. At the end of the paper, a simulation example with a cantilever beam and a vibration shaker test are implemented and the results support the proposed method very well. (C) 2017 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
ISSN号：
1000-9361
是否译文：
否
发表时间：
2017-12-01
合写作者：
Zheng, Ronghui,贺旭东
通讯作者：
陈怀海
发表时间：
2017-12-01
学位：工学博士学位
职称：教授
所在单位：航空学院