Abstract Tower cranes have, in general, low structural damping, leading to challenges with respect to vibrations induced by natural hazards. Crane failures due to wind excitations are very common around the world. In the present research work, a smart tower crane equipped with pairs of collocated sensors and actuators is proposed to mitigate turbulent wind. A three-dimensional finite element model of the crane is created using MATLAB®/Structural Dynamics Toolbox. Modal analysis is performed to calculate natural frequencies and corresponding mode shapes. Dynamic analysis of the crane is carried out under turbulent wind excitation. A decentralized active vibration control method is then used to prevent collapse of the crane. Active damping is added to the tower crane using pairs of force actuators–displacement sensors collocated on selected elements. A robust control strategy based on decentralized direct velocity feedback is implemented. The vibrations of the tower crane in all directions are significantly damped. It is concluded that the proposed smart tower crane model is highly efficient in mitigating the turbulent wind loads.

中文翻译：

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减轻湍流风载荷的智能塔式起重机

摘要 塔式起重机通常具有较低的结构阻尼，导致在自然灾害引起的振动方面面临挑战。由于风力激励引起的起重机故障在世界范围内非常普遍。在目前的研究工作中，提出了一种配备成对的传感器和执行器的智能塔式起重机来减轻湍流风。起重机的三维有限元模型是使用 MATLAB®/Structural Dynamics Toolbox 创建的。执行模态分析以计算固有频率和相应的模态振型。起重机的动力学分析是在湍流风激励下进行的。然后使用分散的主动振动控制方法来防止起重机倒塌。使用配置在选定元件上的成对的力致动器 - 位移传感器为塔式起重机添加主动阻尼。实现了基于分散直接速度反馈的稳健控制策略。塔式起重机在各个方向的振动都得到了显着的阻尼。得出的结论是，所提出的智能塔式起重机模型在减轻湍流风载荷方面非常有效。