【摘要】 在斜拉索-阻尼器减振控制系统数学建模基础上,以某斜拉索桥主桥C20号索为研究对象,基于Halmiton原理建立了斜拉索-磁流变阻尼器减振控制系统的状态空间方程,采用Rayleigh阻尼理论对状态空间方程进行矩阵参数分析计算。运用随机系统控制理论和减振控制器设计,引入了表征斜拉索振幅约束的状态方差性能指标,建立了系统的减振控制算法。数值仿真结果表明,给出的减振控制算法能保证斜拉索在外界激励下的稳定性,系统振幅得到了有效抑制,减振控制效果良好。更多还原

【Abstract】 State space model of stayed cable-magnetorheological damper vibration reduction control system was constructed based on Halmiton principle.Taking the main bridge C20 stayed-cable in Ningbo as the research object,the matrix parameters of the state space equations was analyzed and calculated by using the Rayleigh theory.Thus,based on the state space equation and stochastic control system theory,the vibration reduction control algorithm with state variance performance constrain for stayed cablemagnetorheological damper system was analyzed in detail.Simulation results showed that the given vibration reduction control algorithm could guarantee the stability of stayed cable-magnetorheological damper system and receive effective constraint of the system vibration amplitude.The vibration reduction control effect was good.更多还原