To better control engineering structures subjected to external disturbances, such as earthquakes of varying magnitudes, a smart compound damper is developed and its performance is investigated in this paper. Unlike devices for passive control systems without adjustable control force, the dynamic responses of the engineering structure can be more effectively suppressed under seismic excitation by using devices for active control systems that feature active input to the actuators. A compound damper designed in this vein consists of shape memory alloy (SMA) wires and a variable-friction damper that can provide an adjustable control force according to the level of ground motion by changing the voltage of piezoelectric ceramic (PZC) actuators. Numerical simulations of a seismically excited two-storey steel frame structure were implemented to evaluate the performance of the proposed SMA/PZC compound damper. A back-propagation neural network model was developed using experimentally obtained data to describe the hysteretic behaviour of the SMA wires. A Takagi–Sugeno (T-S) fuzzy controller was used to determine the command voltage of the PZC actuators, such that the compound damper could perform well when applied to structural control. The resulting solution, hybrid control modulated with a T-S fuzzy control strategy, was found to be more effective than passive control.

中文翻译：

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智能复合阻尼器工程结构动态响应控制

为了更好地控制工程结构受到外部干扰，例如不同幅度的地震，本文开发了一种智能复合阻尼器并对其性能进行了研究。与没有可调节控制力的被动控制系统设备不同，通过使用具有对执行器的主动输入的主动控制系统设备，可以更有效地抑制地震激发下的工程结构的动态响应。这种设计的复合阻尼器由形状记忆合金 (SMA) 线和可变摩擦阻尼器组成，该阻尼器可以通过改变压电陶瓷 (PZC) 致动器的电压来根据地面运动水平提供可调节的控制力。对地震激发的两层钢框架结构进行了数值模拟，以评估所提出的 SMA/PZC 复合阻尼器的性能。使用实验获得的数据开发了反向传播神经网络模型来描述 SMA 线的滞后行为。使用 Takagi-Sugeno (TS) 模糊控制器来确定 PZC 执行器的指令电压，这样复合阻尼器在应用于结构控制时可以表现良好。由此产生的解决方案，即用 TS 模糊控制策略调制的混合控制，被发现比被动控制更有效。使用 Takagi-Sugeno (TS) 模糊控制器来确定 PZC 执行器的指令电压，这样复合阻尼器在应用于结构控制时可以表现良好。由此产生的解决方案，即用 TS 模糊控制策略调制的混合控制，被发现比被动控制更有效。使用 Takagi-Sugeno (TS) 模糊控制器来确定 PZC 执行器的指令电压，这样复合阻尼器在应用于结构控制时可以表现良好。由此产生的解决方案，即用 TS 模糊控制策略调制的混合控制，被发现比被动控制更有效。