Active Vibration Control of a Double-Curved Shell Structure Using the Example of Stuttgart Smartshell
Active Vibration Control of a Double-Curved Shell Structure Using the Example of Stuttgart Smartshell
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以 Stuttgart Smartshell 为例的双曲壳体结构的主动振动控制
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
W. Sobek
中科院分区：
文献类型：
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作者：
Martin Weickgenannt;O. Sawodny;Stefan Neuhaeuser;W. Sobek
目前的贡献涉及薄双曲壳结构主动振动控制的概念。该结构名为 Stuttgart SmartShell，位于斯图加特大学。它由软木制成，并配备应变计以确定静态和动态负载的状态。此外，使用液压缸在结构的支撑处提供力输入。这里提出了基于模型的振动阻尼二自由度控制概念，该概念基于从有限元模拟导出的动态模型。该控制策略使用系统状态的模态解耦来实现单特征模态的操纵和阻尼。选择最佳控制策略来尽快抑制振荡，同时考虑力输入和峰值应力的限制。所提出的控制算法应用于所考虑的壳结构，并通过仿真和实验结果证明了其适用性。版权所有 © 2012 by ASME
The present contribution deals with concepts for active vibration control of a thin double-curved shell structure. The structure, Stuttgart SmartShell, is located at the University of Stuttgart. It is made of softwood and is equipped with strain gages to determine the state of static and dynamic loading. Furthermore a force input is provided at the supports of the structure using hydraulic cylinders. Here a model-based two-degree-of-freedom control concept for vibration damping is presented which is based on a dynamical model derived from Finite Element simulations. The control strategy uses modal decoupling of the system states to enable the manipulation and damping of single eigenmodes. An optimal control strategy is chosen to dampen oscillations as quickly as possible while considering limitations on the force input and peak stresses. The proposed control algorithms are applied to the shell structure under consideration and their applicability is demonstrated by simulation and experimental results.Copyright © 2012 by ASME