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Control method for multi-axis stationary non-Gaussian random vibration test
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Rong-hui ZHENG1, Jin-peng LI2, Xiao-hui WEI1, Huai-hai CHEN1
Journal of Vibration Engineering | 2024, 37(3) : 522 - 527
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Journal of Vibration Engineering | 2024, 37(3): 522-527
Control method for multi-axis stationary non-Gaussian random vibration test
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Rong-hui ZHENG1, Jin-peng LI2, Xiao-hui WEI1, Huai-hai CHEN1
Affiliations
  • 1State Key Laboratory of Mechanics and Control for Aerospace Structures，College of Aerospace Engineering， Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
  • 2Defense Technology Research and Test Center，China Aerospace Science and Industry Co.，Ltd.，Beijing 100854，China
Published: 2024-03-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.03.017
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Multi-axial stationary non-Gaussian random vibration control tests can simultaneously control the time-frequency characteristics of the specified response signals. A fast method for generating stationary non-Gaussian random vibration signals with specified power spectral density，skewness and kurtosis is proposed. The target power spectral density is designed as a filter by frequency sampling method. The non-Gaussian random signal is obtained by nonlinear transformation method and then it passes through the designed filter to obtain the desired non-Gaussian random signals. This method is computationally efficient and overcomes the shortcoming of the traditional nonlinear transformation methods. This proposed method is applied to the three-axis stationary non-Gaussian random vibration test，and the closed-loop equalization step of the three-axis non-Gaussian random vibration control is given，which can decouple the power spectrum auto spectrum，coherence coefficient，phase difference，skewness and kurtosis of the signal at the same time. A three-axis stationary non-Gaussian random vibration control test is carried out. The control results of power spectral density，skewness and kurtosis in three directions are satisfactory which meet the requirements of engineering application.

random vibration  /  stationary non-Gaussian  /  multi-axial vibration  /  skewness  /  kurtosis  /  power spectral density
Rong-hui ZHENG, Jin-peng LI, Xiao-hui WEI, Huai-hai CHEN. Control method for multi-axis stationary non-Gaussian random vibration test[J]. Journal of Vibration Engineering, 2024 , 37 (3) : 522 -527 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.03.017
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Year 2024 volume 37 Issue 3
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doi: 10.16385/j.cnki.issn.1004-4523.2024.03.017
  • Receive Date：2022-06-08
  • Online Date：2026-02-10
  • Published：2024-03-28
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  • Received：2022-06-08
  • Revised：2022-07-24
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Affiliations
    1State Key Laboratory of Mechanics and Control for Aerospace Structures，College of Aerospace Engineering， Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China
    2Defense Technology Research and Test Center，China Aerospace Science and Industry Co.，Ltd.，Beijing 100854，China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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