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An experimental study of the impulse response of a vibro-impacting cantilever beam

机译:振动冲击悬臂梁脉冲响应的实验研究

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摘要

The dynamics of a vibro-impacting cantilever beam experiment using an impact load cell is considered. The signal recorded from the cell produces spike train -type data. The issues related to the analysis of such data are discussed; particularly the sampling rate and threshold values. For vibro-impact motion of the beam, the duration of impacts is investigated by using a time of contact measure. The implications are discussed for vibro-impact systems mathematically modelled by using instantaneous impact assumptions (coefficient of restitution). Using the load cell to measure impact forces for the beam system is also considered. Then a delay reconstruction of the dynamics of the system by using interspike intervals is considered. It is demonstrated how this process is effected by the influence of noise and the data-acquision process using numerical simulations of the experimental data. It is shown how simple periodic motions can be identified by using a probability density approach and possible future research is highlighted.
机译:考虑了使用冲击力传感器的振动冲击悬臂梁实验的动力学。从单元记录的信号产生尖峰序列型数据。讨论了与此类数据分析有关的问题;特别是采样率和阈值。对于梁的振动冲击运动,通过使用接触时间来研究冲击的持续时间。讨论了对于通过使用瞬时影响假设(恢复系数)进行数学建模的振动影响系统的含义。还考虑使用测力传感器测量梁系统的冲击力。然后,考虑使用尖峰间间隔对系统动力学进行延迟重构。使用实验数据的数值模拟证明了此过程如何受到噪声和数据采集过程的影响。它显示了如何使用概率密度方法识别简单的周期性运动,并着重指出了可能的未来研究。

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