Concurrent Control Strategy Research for Non-Gaussian Random Vibration Test

Abstract

Abstract: Concurrent control strategy research for non-Gaussian random vibration test is proposed in order to solve the mutual interference between power spectrum and Kurtosis equilibrium in non-Gaussian random vibration test control, which affects the control accuracy. Both power spectrum equilibrium control algorithm and Kurtosis equilibrium control algorithm are presented based on the given control flow chart for whole system. The generation principle of random signal contained Kurtosis information is investigated, the flow chart for signal generation is given, subsequently, design parameters for random signal conforming to the control system is inferred. The filter is designed by using power spectrum and drive signal applied for control system is also modulated through convolution operation. The simulation and experiment based on concurrent control strategy for non-Gaussian random vibration tests indicate that the error between output response spectrum and reference spectrum satisfies the engineering requirement of ±3 dB, and kurtosis also conforms to demands in practice with high control accuracy, thus proving the validity of this control strategy.

Key words: Concurrent control, Kurtosis, Non-Gaussian, Random vibration test, Shot noise

CLC Number:

O324

CHEN Jiayan;CHEN Zhangwei;HE Huinong;ZHOU Jianchuan. Concurrent Control Strategy Research for Non-Gaussian Random Vibration Test[J]. , 2012, 48(4): 193-198.

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Concurrent Control Strategy Research for Non-Gaussian Random Vibration Test

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