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Adaptive multimodal vibration suppression using fuzzy-based control with limited structural data

机译:有限结构数据的基于模糊控制的自适应多模态振动抑制

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摘要

We propose a novel fuzzy-based method of adaptive multimodal vibration suppression with limited structural data. The adaptive control consists of fuzzy inference and a semi-active switching approach. We demonstrate it to be applicable to multimodal vibration suppression for vibrating structures, where a single piezoelectric actuator suppresses two modal vibrations simultaneously. Our fuzzy-based semi-active control requires only the structural information of natural frequencies for real-time adaptive feedback, whereas common adaptive controls require highly precise structural models or complete equations of motion. We conduct experiments in semi-active vibration suppression using the proposed fuzzy-based control, and compare the suppression performance of our fuzzy-based approach with conventional controls. The experiments indicate that the proposed fuzzy-based control demonstrates good adaptability when experiencing sudden changes in disturbance excitation, and also demonstrates high suppression performance. The fuzzy-based control can adapt to a wide range of disturbance conditions, both within and outside the range of vibration excitations assumed when the controller is designed.
机译:我们提出了一种新的基于模糊的自适应多模态振动抑制方法,结构数据有限。自适应控制包括模糊推理和半主动切换方法。我们证明了它适用于振动结构的多模式振动抑制,其中单个压电致动器可以同时抑制两个模式振动。我们基于模糊的半主动控制仅需要固有频率的结构信息即可进行实时自适应反馈,而常见的自适应控制则需要高精度的结构模型或完整的运动方程。我们使用提出的基于模糊的控制进行半主动振动抑制的实验,并将基于模糊的方法的抑制性能与常规控制进行比较。实验表明,所提出的基于模糊的控制在遇到扰动激励的突然变化时表现出良好的适应性,并且还表现出较高的抑制性能。基于模糊的控制可以适应各种干扰条件,无论是在设计控制器时所假定的振动激励范围之内还是之外。

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