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Bending and Torsional Vibration Control of a Flexible Structure Using H-infinity Based Robust Control

机译:基于H-∞的鲁棒控制的挠性结构的弯曲和扭转振动控制

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摘要

This paper proposes a method for controlling the bending and torsional vibration of a flexible structure using H _∞based optimal control. For this propose, we make a reduced order lumped mass model expressed by 3-DOF systems, considering the first three vibration modes and neglecting all the other high frequency modes. These neglected modes are regarded as unstructured uncertainties in the design stage. To prevent spillover instability caused by neglected mode, a modeling method based on the occurrence of uncontrollability and unobservability realized structurally at the nodes of the vibration modes is applied. Then, a static state feedback controller is designed based on the reduced order model and the approximate knowledge of the unmodeled uncertainties. The first three vibration modes of the flexible structure are controlled using a hybrid dynamic absorber. The discrete model and the controller design are verified through numerical simulations and experimental studies.
机译:提出了一种基于H_∞的最优控制方法来控制柔性结构的弯曲和扭转振动。对于此建议,我们考虑了前三个振动模式并忽略了所有其他高频模式,制作了一个由3-DOF系统表示的降阶集总质量模型。这些被忽略的模式在设计阶段被视为非结构化的不确定性。为了防止由于忽略模式引起的溢出不稳定性,采用了一种基于在振动模式的节点上结构上实现的不可控制性和不可观测性的建模方法。然后,基于降阶模型和未建模不确定性的近似知识,设计了一种静态反馈控制器。柔性结构的前三个振动模式是使用混合动力吸收器控制的。通过数值模拟和实验研究验证了离散模型和控制器设计。

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