A control method for multi-shaker half sine shock on random mixed vibration test is presented. The key parts of the multi-shaker shock on random vibration control are the generation of desired multi-input drive signals, separation of measured multi-output response signals and control of separated response signals. In this work, the classic half sine shock signal is recalled first and then a compensated half sine shock signal is presented to make sure the velocity and displacement at the end of the signal are zero. A shock on random separation method is proposed based on the kurtosis features of the mixed and separated signals. It is found that the kurtosis of a pure shock signal is only related to the durations of the shock and total signal. Afterwards, the multi-shaker mixed vibration control procedure is formulated. The reference values are composed of the reference spectral densities for the random component and reference amplitudes for the shock component. The shock interval between every two shocks and the time difference of shocks between different control channels can be defined. A simulation example using a cantilever beam system and a triaxial mixed vibration test are provided and the results indicate the validity and feasibility of the proposed methods.

提出了一种随机混合振动试验中多激振器半正弦冲击的控制方法。多激振器冲击随机振动控制的关键部分是期望的多输入驱动信号的产生、被测多输出响应信号的分离和分离响应信号的控制。在这项工作中，首先调用经典的半正弦冲击信号，然后呈现补偿后的半正弦冲击信号，以确保信号末端的速度和位移为零。基于混合和分离信号的峰态特征，提出了一种冲击随机分离方法。发现纯冲击信号的峰度仅与冲击持续时间和总信号有关。然后，制定了多激振器混合振动控制程序。参考值由随机分量的参考谱密度和冲击分量的参考幅度组成。可以定义每两次冲击之间的冲击间隔和不同控制通道之间冲击的时间差。提供了使用悬臂梁系统和三轴混合振动试验的仿真实例，结果表明了所提出方法的有效性和可行性。