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Power spectrum and kurtosis separation method for multi-shaker non-Gaussian random vibration control

机译：多振动筛非高斯随机振动控制的功率谱和峰峰分离方法

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摘要

An innovative power spectrum and kurtosis separation control strategy for a non-Gaussian random vibration test is proposed in this work. In the existing non-Gaussian random vibration test method, the spectrum and kurtosis control channels are identical and the responses of non-control channels usually approach Gaussian. This work aims at the practical situation where the spectrum and kurtosis control channels are not completely coincident. The key ideas of the proposed non-Gaussian separation control strategy are that the predefined reference spectral densities of the spectrum control channels are used to generate equivalent reference spectral densities of the kurtosis control channels, then the equivalent reference spectral densities combined with the reference kurtoses are used to obtain the desired drive signals. For the single-shaker separation control, the non-Gaussian separation control method can be implemented. When it comes to the multi-shaker case, the coupling problems caused by the cross spectra and inherent multi-input multi-output physical system have an influence on the setting between the reference spectra and reference kurtoses and on the simultaneous control of the response spectra and response kurtoses. Simulation examples with a mass-spring-damping system are carried out and the results are discussed. Finally, biaxial separation and non-separation non-Gaussian random vibration tests are provided to verify the feasibility of the proposed control method.
机译：在这项工作中提出了一种用于非高斯随机振动试验的创新的功率谱和峰值分离控制策略。在现有的非高斯随机振动试验方法中，光谱和峰氏症控制通道是相同的，并且非控制信道的响应通常接近高斯。这项工作旨在实现频谱和刚度控制通道不完全一致的实际情况。所提出的非高斯分离控制策略的关键思想是，频谱控制通道的预定义参考光谱密度用于产生峰值控制通道的等效参考光谱密度，然后与参考kurtoss结合的等效参考光谱密度是用于获得所需的驱动信号。对于单振动筛分离控制，可以实现非高斯分离控制方法。涉及到多振动筛的情况下，由跨光谱和固有的多输入多输出物理系统引起的耦合问题对参考光谱和参考库纹之间的设置以及对响应光谱的同时控制产生了影响和响应kurtoss。进行具有质量弹簧阻尼系统的仿真实例，并讨论了结果。最后，提供了双轴分离和非分离的非高斯随机振动试验，以验证所提出的控制方法的可行性。

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  • 来源
    《Mechanical systems and signal processing》 |2022年第1期|108015.1-108015.11|共11页
  • 作者

    Ronghui Zheng; Guoping Chen; Huaihai Chen;

  • 作者单位

    State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China;

    State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Multi-shaker vibration; Separation control; Non-Gaussian random; Power spectral density; Kurtosis;

    机译：多瓶振动;分离控制;非高斯随机;功率谱密度;Kurtosis.;

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