基于部分反馈的LQG模态半主动控制算法  

Partial feedback based LQG semiactive modal control algorithm for complex structure

作　　者：林伟[1] 陈尚鸿[1] 张根明[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《福建工程学院学报》2011年第6期542-545,共4页Journal of Fujian University of Technology

基　　金：福建省自然科学基金项目(2011J05128)

摘　　要：针对复杂结构半主动控制造价高、难以实现工程应用的缺点,对传统模态半主动控制算法改进并提出基于部分反馈的LQG模态半主动控制算法。算法中设计的Kalman滤波估计器可直接从结构的部分反馈信息对截断模态响应向量进行估计。通过在一安装有MR阻尼器的平板网架结构振动控制数值仿真表明,该算法对外部激励有很好的适应性,控制效果可以接近传统Clipped-optimal半主动控制算法,同时由于控制方程维数和所需传感器个数的降低,将更适合于复杂结构的工程应用。Semiactive control systems of complex structures are of high cost and are unfavourable to use in real projects. Based on the traditional semiactive modal control algorithm, a partial feedback based LQG semiactive modal control algorithm is proposed. A Kalman filter estimator in the control algorithm can estimate the truncated modal responses vectors directly through partial acceleration feedback. Numerical simulation is conducted on a lattice structure installed with MR damper. The results show that the proposed control algorithm has good adaptability to external excitations, that the control effectiveness is similar to the traditional clipped-optimal control algorithm. Moreover, the reduction in the number of sensors required in the control system and in the dimension of control equation makes the proposed control algorithm more suitable for complex engineering applications.

关 键 词：复杂结构 部分反馈 半主动控制 模态控制 KALMAN滤波 

分 类 号：TU311.3[建筑科学—结构工程]