基于磁致伸缩作动器的拉索主动控制时滞补偿研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (14) : 208-215.

论文

孙洪鑫，李建强，王修勇，方聪

作者信息 +

Time delay compensation research of active cable vibration control with giant magnetostrictive actuator

SUN hongxin LI jianqiang WANG xiuyong FANG cong

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文章历史 +

摘要

拉索的大幅振动给斜拉桥安全运营带来威胁，采用磁致伸缩作动器施加轴向控制力抑制拉索横向振动是一种可行的方法，由于控制系统时滞的存在，会影响拉索控制效果和结构的稳定性。本文建立了磁致伸缩作动器动力学模型和拉索-磁致伸缩作动器面内控制系统方程，提出了基于移相法的拉索控制时滞补偿理论和拉索非线性控制系统的线性化方法，通过仿真分析得到了拉索振动控制时滞补偿效果。研究表明，在拉索-磁致伸缩作动器时滞控制系统中，移相法能够取得良好的时滞补偿效果，接近无时滞最优控制减振率。

Abstract

The large amplitude vibration of stay cables will give rise to the safe operation risk on the cable-stayed bridges. It is a kind of feasible method for cable vibration control using axial force provided by giant magnetostrictive actuator（GMA）. However, time delays are frequently encountered in the actual control system, which can diminish the performance and stability of the stay cable vibration control system. In this paper, the dynamic model of GMA and motion equation of the stay cable coupling GMA control system are established. Focus to the cable coupling GMA control system with time delay and nonlinear, the time delay compensation theory is proposed based on the phase shift method, and the linearization method of is put forward. The delay compensation effect of the cable coupling GMA control system is obtained by simulation analysis. Results show that phase shift method can achieve good effect of time-delay compensation in above system, which is close to the vibration reduction rate without delay optimal control.

导出引用

孙洪鑫，李建强，王修勇，方聪. 基于磁致伸缩作动器的拉索主动控制时滞补偿研究[J]. 振动与冲击, 2017, 36(14): 208-215

SUN hongxin LI jianqiang WANG xiuyong FANG cong. Time delay compensation research of active cable vibration control with giant magnetostrictive actuator[J]. Journal of Vibration and Shock, 2017, 36(14): 208-215

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