The bridge stay cable, one of the most critical components in cable-stayed bridges, is vulnerable to vibrations owing to its low inherent damping capacity. Thus effective vibration control technology for bridge stay cables is extremely critical to safe operations of cable-stayed bridges. Several countermeasures have been presented and/or implemented to mitigate this vibration; however the passive method can only add a small amount of damping to the cables, excessive energy demand of active control devices severely limits its practicality, the semi-active control methods still have the drawbacks of complex state estimation module and a large amount of control algorithm calculation. This paper proposes a practical magnetorheological pseudo negative stiffness (MR-PNS) control system coupled with control strategy for bridge stay cables. The current reference point is introduced in the dynamic modeling of the MR-PNS control system to characterize the current control strategy. This paper investigates the adjustable of MR-PNS control system performance and energy consumption caused by different current strategies. Taking the vibration control of the Nanjing Second Yangtze River Bridge J20 cable as an example, the simulation results highlight the advantages of the MR-PNS control system that the failure area is small, the quasi-optimal area is wide, and it can still keep sort of vibration damping performance in the degenerate area. The model cable vibration control test proves the feasibility and efficiency of the single input MR-PNS bridge stay cables control method.

斜拉索是斜拉桥中最关键的组件之一，由于其固有的阻尼能力低，因此容易受到振动的影响。因此，用于斜拉桥的有效振动控制技术对于斜拉桥的安全运行至关重要。已经提出和/或实施了一些对策来减轻这种振动。但是被动方式只能给电缆增加少量的阻尼，主动控制装置的过多能量需求严重限制了其实用性，半主动控制方式仍然存在状态估计模块复杂，控制算法繁琐的缺点。计算。本文提出了一种实用的磁流变拟负刚度（MR-PNS）控制系统，并结合了斜拉索的控制策略。在MR-PNS控制系统的动态建模中引入了当前参考点，以表征当前的控制策略。本文研究了由不同电流策略引起的MR-PNS控制系统性能和能耗的可调性。以南京第二长江大桥J20电缆的振动控制为例，仿真结果突出了MR-PNS控制系统的优点，即故障面积小，准最优​​区域宽，仍能保持退化区域的减震性能。模型振动控制试验证明了单输入MR-PNS桥拉索控制方法的可行性和有效性。