In this study, a novel modal control strategy by means of semi‐actively lockable joints is proposed. The control strategy allows for a directed flow of energy between vibrational modes, which makes it suitable not only for vibration attenuation purposes but also for energy scavenging driven by electromechanical energy harvesters. The proposed control strategy is an extension of the prestress‐accumulation release (PAR) technique; however, it introduces also new concepts that increase the efficiency of the overall control system. Contrary to the PAR, the proposed method requires measurement of both strains in the vicinity of the semi‐active joints and translational velocities that provide global information about system behavior. The latter aspect requires the control system to be organized within a hierarchical feedback architecture. The benefit from this higher complexity of the control system is its better performance compared to the PAR. The proposed semi‐active modal control not only attenuates structural vibration faster, but it also achieves this goal with a smaller number of switches implemented in the joints. The effectiveness of the proposed methodology has been demonstrated on structures equipped with two lockable joints. Two practical examples have been investigated: one employs the concept of vibration‐based energy harvesting for a two‐story frame structure, while the second one reduces vibration of an eight‐story frame structure subjected to kinematic excitation.

中文翻译：

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具有可锁缝的结构的半主动模态控制：一般方法和应用

在这项研究中，提出了一种通过半主动锁定关节的新型模态控制策略。控制策略允许能量在振动模式之间定向流动，这使其不仅适用于振动衰减目的，还适用于由机电式能量收集器驱动的能量清除。拟议的控制策略是对预应力-累积释放（PAR）技术的扩展。但是，它也引入了新概念，可以提高整个控制系统的效率。与PAR相反，所提出的方法需要测量半主动关节附近的应变以及提供有关系统行为的全局信息的平移速度。后一方面要求控制系统被组织在分级反馈体系结构内。与PAR相比，控制系统的更高复杂性带来的好处是其更好的性能。所提出的半主动模态控制不仅可以更快地衰减结构振动，而且还可以通过在关节中使用较少数量的开关来实现此目标。所提出的方法的有效性已在配备两个可锁定接头的结构上得到证明。研究了两个实际示例：一个对两层框架结构采用了基于振动的能量收集的概念，而第二个例子则减小了受运动激励作用的八层框架结构的振动。但也可以通过在关节中实施较少数量的开关来实现此目标。所提出的方法的有效性已在配备两个可锁定接头的结构上得到证明。研究了两个实际示例：一个对两层框架结构采用了基于振动的能量收集的概念，而第二个例子则减小了受运动激励作用的八层框架结构的振动。但也可以通过在关节中实施较少数量的开关来实现此目标。所提出的方法的有效性已在配备两个可锁定接头的结构上得到证明。研究了两个实际示例：一个对两层框架结构采用了基于振动的能量收集的概念，而第二个例子则减小了受运动激励作用的八层框架结构的振动。