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Multi-mode vibration control of a flexible cantilever beam using adaptive resonant control

机译:使用自适应共振控制的柔性悬臂梁多模式振动控制

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摘要

In this paper, an adaptive resonant controller is used to attenuate multi-mode vibrations in a flexible cantilever beam structure with varying loading conditions. This controller is particularly designed for structures that are exposed to previously unmodelled dynamics. On-line estimation of the structure's natural frequencies is used to update the, adaptive resonant controller's parameters. The estimation of the natural frequencies is achieved using a parallel set of second-order recursive least squares estimators, each of which is designed for a specific vibration mode of concern. To achieve the desired estimation accuracy for each mode frequency, a different sampling rate suitable for that mode is used for the corresponding estimator. Experiment results show that the proposed adaptive strategy can achieve better performance, as measured by attenuation level, over its fixed-parameter counterpart for a range of unmodelled dynamics.
机译:在本文中,自适应谐振控制器用于衰减具有可变载荷条件的柔性悬臂梁结构中的多模振动。该控制器专为暴露于先前未建模动力学的结构而设计。结构固有频率的在线估计用于更新自适应谐振控制器的参数。使用一组并行的二阶递归最小二乘估计器可以实现自然频率的估计,每个估计器都针对特定的振动模式进行设计。为了获得每个模式频率的期望估计精度,将适合于该模式的不同采样率用于相应的估计器。实验结果表明,对于一系列未建模的动力学,所提出的自适应策略在其固定参数对应物上,以衰减水平衡量,可以获得更好的性能。

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